system
Given the following post, respond as if you're commenting on Reddit:
human
Are organelles inside cells actually colored?

In cell models you can see the organelles colored in certain ways. Are they actually colored like this, or are they colored that way so we can differentiate them.
gpt
Some are colored, but most are not*. Chloroplasts are a good example of organelles that are colored due to the presence of chlorophyll. Melanosomes are also colored due to the presence of melanin, just to name a couple examples.

*Technically, proteins and DNA absorb light, so you might consider calling them colored. However, most proteins absorb at 280nm (barring the presence of a chelated metal), so they would generally have absorbance outside of the visible spectrum.