user1324: As part of implementing the new unified themes across the network, we're gradually rolling out updated site themes for each site. As of today, we have enabled your updated site theme for testing. 
If you can't see it right now, that's by design! This is a very early test implementation of your design and we need your help finding issues with it before we make it live for everyone permanently. So, keep in mind, there will be things that need fixing! We'll address those things as we can.
If you'd like to review it, here's how:
How do I enable it?
Click here and check the "Beta test new themes" option. This will turn on the new theme for all sites that have one in testing, including this one. Here's more info on how to opt in. You can uncheck the box to revert to the older theme until the site is live for everyone. Note, while turning it on is immediate, it will take a few minutes to revert to the old view - but it will go through!
What type of feedback do we need?
On this post: Bugs related to this site's design elements
Please help us look for issues/bugs related to the theme design and how we have mapped the old theme to the new. This needs to be done within the limits of the new unified theme.
This could include colors of sections of the design or text, problems with JavaScript add-ons (if applicable), the logo or top banner appearance or other artwork.
You can also feel free to ask questions about the new layout if you're unsure how to navigate it.
On Meta Stack Exchange: General concerns about left nav or theming
There are some things that are definitely changing everywhere and can't really be adjusted on a per-site basis. A few of them include:

Top banner is shorter in height, so some artwork has to be adjusted along with some logos.
Left Navigation is active everywhere (but can be collapsed into a menu by visiting your site preferences - instructions here).
Responsive layout is active, which lets the site adjust as browser widths change - no side scrolling (some pages haven't been updated, yet, though). For now, if you prefer the scrolling, you can disable this by clicking the "disable responsiveness" link in the footer.
Many site elements including tags and voting arrows are standardized across the network.
Link underlining is active. In an effort to make links more visible, they are now being underlined.

If you have concerns or issues regarding the left nav or the overall approach we are taking to theming, then this Meta Stack Exchange post is the right place for feedback. 
As I mentioned earlier, there are some unique design elements like voting arrows and tags that are being standardized in this process. Keeping these custom elements makes our ability to maintain the sites too complex and, while we're very sad to see them go, we're in a difficult position of needing to make the site designs work together so that we can continue to address feature requests and bugs that will make your Q&A experience better. This is addressed in a Meta Stack Exchange post if you want more detail.
What new themes?
If you're like, "What the heck are you talking about?", then you should read the Meta Stack Exchange post entitled Rollout of new network site themes (and maybe the posts it links to for the full background). To follow along with the rollout of these new themes, go here.
Thanks so much for your constructive feedback!
Oh, Who am I?
If you don't know me, I'm one of the Community Managers here at Stack Exchange. I'm here to listen to your input and convey it to our Design team for responses and fixes to bugs. I'll do my best to respond to your concerns and explain whether changes we've made are bugs that can be changed or if they're by design and why.

user16866: My current thoughts: 

I agree with other responses that the new Ask Question button location is, well, silly given all the "wasted" white space it generates. 
80% of my navigation on the site is via the buttons (Questions, Tags, Users,....Ask Question) currently found on the main site header (i.e., on the green background), so removal of those buttons would be quite an annoying transition for me.

I assume their removal was to account for other site's more intricate title bars??

I agree with @canadianer that an ability to hide the left menu is desirable since I find it robs too much screen space. 
I also wish to repeat other's concern about the contrast of new color schemes. 


user9943: It's OK, but:

The background design has lost its contrast and is indeed faded as stated by one of our rocks on this site, canadianer;
Something that has been bothering me for a long time (i.e., not just in this new theme) - on many displays, especially pc monitors, the yellow-highlighted questions (favorited tags etc) are barely discernable from the 'regular' questions; this is also a contrast issue. It's only on my mobile device that colors are displayed in sufficient contrast. With a new theme this might be a good moment to change that, especially given the comments by canadianer. Contrast should be maximized, especially given that low-vision people may also wish to enjoy our site.


user806: I'm not a fan of the changes to the design, but I like the changes to the behaviour when window size is modified.
tl;dr: Please leave the design as it is and just modify the resizing behaviour.
The only visual aspect that I like about the new design is that the top bar stretches wider (but why does the Search box stay the same size?). All other visual changes make the design less appealing than it is currently for me. Specifically I dislike: smaller title icon and oversized "Top Questions" heading, smaller patterned top-bar background (the bit behind the title icon), paler background colour, pale link colours (barely any contrast to the background), square-shaped accepted-answer highlight, square borders around non-accepted answers, painfully green accepted-answer highlight, button-look of the Active/Hot/New nav. The last few nicely cooperate to make the site look as boxy as the 2000s
I appreciate that I can at least hide the side navigation.
I don't see any reason why you can't make the changes to the resizing behaviours and leave the colours, font sizes, and borders/shapes as they are.

user6307: 
It looks strange that the main site header (ie the logo) is smaller than the sub-header "Top Questions". Compare with the old design. When viewing individual questions, the same applies to their titles.
I prefer the darker greens of the old design. The new design looks washed out / faded.
The "Top Questions" text is almost black. Too black. Nearly all other text is a lighter grey or green.
The "Ask Question" and "Active"/"Featured"/etc buttons look out of place. As far as I can tell, the green of the "Ask Question" button and the grey background of the "Active" button are not used anywhere else on the site. They are also positioned in such a way that there is a lot of wasted space around both them and the "Top Questions" header. In the old design, the looked like they belonged. At the very least, perhaps the "Active"/"Featured"/etc buttons need to be on the same line as the "Top Questions" header and "Ask Question" button.
Disabling the left navigation bar (thank you for this option) condenses the links into a hamburger menu in the top navigation bar. However, the top line of this menu button is one pixel narrower than the bottom two. This may sound silly, but it is noticeable. This is on Edge in Windows 10, if it makes a difference. If I zoom-in with the browser, the button is rendered correctly.




1324: <p>As part of implementing the new unified themes across the network, we're gradually rolling out updated site themes for each site. As of today, we have enabled your updated site theme for testing. </p>

<p>If you can't see it right now, that's by design! This is a very early test implementation of your design and we need your help finding issues with it before we make it live for everyone permanently. So, keep in mind, there will be things that need fixing! We'll address those things as we can.</p>

<p>If you'd like to review it, here's how:</p>

<h2>How do I enable it?</h2>

<p><a href="https://biology.meta.stackexchange.com/users/preferences">Click here</a> and check the "Beta test new themes" option. This will turn on the new theme for all sites that have one in testing, including this one. <em>Here's <a href="https://meta.stackexchange.com/questions/314542/opt-in-to-beta-testing-new-themes">more info</a> on how to opt in.</em> You can uncheck the box to revert to the older theme until the site is live for everyone. <strong>Note, while turning it on is immediate, it will take a few minutes to revert to the old view - <em>but it will go through!</em></strong></p>

<h2>What type of feedback do we need?</h2>

<h3>On this post: Bugs related to this site's design elements</h3>

<p>Please help us look for issues/bugs related to the theme design and how we have mapped the old theme to the new. This needs to be done within the <a href="https://meta.stackexchange.com/questions/307862/ch-ch-ch-changes-left-nav-responsive-design-themes">limits of the new unified theme</a>.</p>

<p>This could include colors of sections of the design or text, problems with JavaScript add-ons (if applicable), the logo or top banner appearance or other artwork.</p>

<p>You can also feel free to ask questions about the new layout if you're unsure how to navigate it.</p>

<h3>On Meta Stack Exchange: General concerns about left nav or theming</h3>

<p>There are some things that are definitely changing everywhere and can't really be adjusted on a per-site basis. A few of them include:</p>

<ul>
<li>Top banner is shorter in height, so some artwork has to be adjusted along with some logos.</li>
<li>Left Navigation is active everywhere (but can be collapsed into a menu by visiting your site preferences - <a href="https://meta.stackexchange.com/a/311237/284336">instructions here</a>).</li>
<li>Responsive layout is active, which lets the site adjust as browser widths change - no side scrolling (some pages haven't been updated, yet, though). For now, if you prefer the scrolling, you can disable this by clicking the "disable responsiveness" link in the footer.</li>
<li>Many site elements including tags and voting arrows are standardized across the network.</li>
<li>Link underlining is active. In an effort to make links more visible, they are now being underlined.</li>
</ul>

<p>If you have concerns or issues regarding the left nav or the overall approach we are taking to theming, then <a href="https://meta.stackexchange.com/questions/310908/live-left-nav-new-theming-and-responsiveness">this Meta Stack Exchange post</a> is the right place for feedback. </p>

<p>As I mentioned earlier, there are some unique design elements like voting arrows and tags that are being standardized in this process. Keeping these custom elements makes our ability to maintain the sites too complex and, while we're very sad to see them go, we're in a difficult position of needing to make the site designs work together so that we can continue to address feature requests and bugs that will make your Q&amp;A experience better. This is addressed in a <a href="https://meta.stackexchange.com/questions/314799/why-we-initiated-the-latest-round-of-design-changes-and-the-role-of-meta">Meta Stack Exchange post</a> if you want more detail.</p>

<h2>What new themes?</h2>

<p>If you're like, "What the heck are you talking about?", then you should read the Meta Stack Exchange post entitled <a href="https://meta.stackexchange.com/questions/312365/rollout-of-new-network-site-themes">Rollout of new network site themes</a> (and maybe the posts it links to for the full background). To follow along with the rollout of these new themes, go <a href="https://meta.stackexchange.com/questions/314979/rollout-of-responsive-design-site-themes-tracking-post">here</a>.</p>

<h2>Thanks so much for your constructive feedback!</h2>

<h3>Oh, Who am I?</h3>

<p>If you don't know me, I'm one of the <a href="https://meta.stackexchange.com/questions/99338/who-are-the-community-team-and-what-do-they-do?s=1%7C141.4591">Community Managers</a> here at Stack Exchange. I'm here to listen to your input and convey it to our Design team for responses and fixes to bugs. I'll do my best to respond to your concerns and explain whether changes we've made are bugs that can be changed or if they're by design and why.</p>
 16866: <p>My current thoughts: </p>

<ol>
<li><p>I agree with other responses that the new Ask Question button location is, well, silly given all the "wasted" white space it generates. </p></li>
<li><p>80% of my navigation on the site is via the buttons (Questions, Tags, Users,....Ask Question) currently found on the main site header (i.e., on the green background), so removal of those buttons would be quite an annoying transition for me.</p>

<ul>
<li>I assume their removal was to account for other site's more intricate title bars??</li>
</ul></li>
<li><p>I agree with @canadianer that an ability to hide the left menu is desirable since I find it robs too much screen space. </p></li>
<li><p>I also wish to repeat other's concern about the contrast of new color schemes. </p></li>
</ol>
 9943: <p>It's OK, but:</p>

<ul>
<li>The background design has lost its contrast and is indeed faded as stated by one of our rocks on this site, canadianer;</li>
<li>Something that has been bothering me for a long time (<em>i.e.</em>, not just in this new theme) - on many displays, especially pc monitors, the yellow-highlighted questions (favorited tags etc) are barely discernable from the 'regular' questions; this is also a contrast issue. It's only on my mobile device that colors are displayed in sufficient contrast. With a new theme this might be a good moment to change that, especially given the comments by canadianer. Contrast should be maximized, especially given that low-vision people may also wish to enjoy our site.</li>
</ul>
 806: <p>I'm not a fan of the changes to the design, but I like the changes to the behaviour when window size is modified.</p>

<p>tl;dr: Please leave the design as it is and just modify the resizing behaviour.</p>

<p>The only visual aspect that I like about the new design is that the top bar stretches wider (but why does the Search box stay the same size?). All other visual changes make the design less appealing than it is currently for me. Specifically I dislike: smaller title icon and oversized "Top Questions" heading, smaller patterned top-bar background (the bit behind the title icon), paler background colour, pale link colours (barely any contrast to the background), square-shaped accepted-answer highlight, square borders around non-accepted answers, painfully green accepted-answer highlight, button-look of the Active/Hot/New nav. The last few nicely cooperate to make the site look as boxy as the 2000s</p>

<p>I appreciate that I can at least hide the side navigation.</p>

<p>I don't see any reason why you can't make the changes to the resizing behaviours and leave the colours, font sizes, and borders/shapes as they are.</p>
 6307: <ul>
<li>It looks strange that the main site header (ie the logo) is smaller than the sub-header "Top Questions". Compare with the old design. When viewing individual questions, the same applies to their titles.</li>
<li>I prefer the darker greens of the old design. The new design looks washed out / faded.</li>
<li>The "Top Questions" text is almost black. Too black. Nearly all other text is a lighter grey or green.</li>
<li>The "Ask Question" and "Active"/"Featured"/etc buttons look out of place. As far as I can tell, the green of the "Ask Question" button and the grey background of the "Active" button are not used anywhere else on the site. They are also positioned in such a way that there is a lot of wasted space around both them and the "Top Questions" header. In the old design, the looked like they belonged. At the very least, perhaps the "Active"/"Featured"/etc buttons need to be on the same line as the "Top Questions" header and "Ask Question" button.</li>
<li>Disabling the left navigation bar (thank you for this option) condenses the links into a hamburger menu in the top navigation bar. However, the top line of this menu button is one pixel narrower than the bottom two. This may sound silly, but it is noticeable. This is on Edge in Windows 10, if it makes a difference. If I zoom-in with the browser, the button is rendered correctly.</li>
</ul>

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