Use the sliders to increase and decrease the red, green, blue, and A (transparency) values. The higher the color slider is the more of that color will be represented. The higher the A slider is, the more opaque it will be. Press S to see the values in numbers and S to hide them again. Press G to toggle the grid on or off. If you set the red blue and green values to the same value then it will make grey. 255, 255, 255, 0-1 is white. 0, 0, 0, 1 is black.
I used a tiny bit of code from the scratch wiki page but the rest was me. If you want you can check on and RGBA color picker and all the colors are 100% accurate.
