Between Security and Insurgent customizable clothing, the Insurgent clothing has access to bright, saturated clothing. When playing against Insurgents, I find and target Insurgent players in P.V.P. wearing Red, Yellow, and White-colored clothing faster than Insuregent players wearing the usual Dark or camo-colored clothing.
I believe that either the colors need to be less saturated or that those colors are taken off completely. I find some of the available colors ridiculous for battle-harden Insurgents wearing them that obviously stands out in the environment. There will be players who will go for the most expensive clothing with the brighter colors just to look cool or show off that they have credits to spend, affecting their chances of survival and how they become easy targets to spot.
I know that smart players won't touch or customize their characters wearing bright-colored clothing and that those brightly-colored options are expensive at the moment, but to keep the general asyemmtric design compared with Security's customization and to keep clothing styles realistic in a middle of a faded-colored war-torn environment, bright colors don't fit.