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Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] What are the helmets the rebel soldiers are wearing on Tantive IV? And how effective are they?

Also why couldn't the rebels have armor as effective as storm trooper armor? Even stolen storm trooper armor painted a different color or something wasn't a thing for them.
gpt
Rebel troopers of various units spread across the galaxy were often equipped with uniforms bearing a striking resemblance to the uniforms of the Alderaanian armed forces. Alliance sympathizers within the Alderaanian government helped fund, train and equip many militant groups outside the Alderaan system. The unadmitted military support of the Alliance was to such an extent that it helped shape the look of Rebel troopers for years to come. Even after the Destruction of Alderaan in 0 BBY, and perhaps because of it, many Rebel units began showing up in uniforms greatly inspired by the former Alderaanian armed forces. Much of the uniforms and equipment came from the Galactic Republic's Planetary Security Forces.

The Alderaanian-looking and most common uniform of the Rebel troopers consisted of blue shirts, black combat vests, gray trousers and black calf length boots. To protect officers and general infantry from head injuries, white blast helmets with blast visors and extended neck guards were issued as standard head-wear. They, however, lacked the level of armor utilized by their imperial counterparts. This basic uniform was seen all over the galaxy, often with smaller differences in design and coloring.