Use 35-50 on main, or use 50-75 to be more blatant on main. 50-100 and more should be fine on alts. Ik it's undetectable on the max settings on some servers but using 35-50 on main is less suspicious and still gives you advantage.
If you want the RGB you need to click on the settings icon then select the color. There is a button on the color picker. Click on that then you have RGB. (It looks like you already have it)