like if you wanted to mix paint to get a color from a computer would you do the opposite of what the RGB value is? I’m confused

like if I wanted to take the RBG code R:99, G: 66, B, 33 wouldn’t it look more lightful than if I mixed paint into 1 part blue, 2 part green, 3 part red? how would you paint a color code?

  • HatchetHaro@pawb.social
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    9 hours ago

    paint and light are different. for light, you are adding colours onto black to make it brighter; for paint, you are subtracting colours from white to make it darker. thus, respectively, additive and subtractive colours.

    red, yellow, and blue being “primary colours” is there because people probably think “magenta” and “cyan” are too complex of concepts to teach young kids. it is cool to have a way to make orange and purple without delving into paint ratios, though. it’s good enough for general use for sure, but if you want to get into colour accuracy for print, CMY is the way to go.

    here’s a quick and simple cheat sheet to help you out!

    additive colours (RGB; screen pixels, LEDs):

    • nothing = black
    • red + green = yellow
    • green + blue = cyan
    • blue + red = magenta
    • red + green + blue = white

    subtractive colours (CMY(K); paint, prints, colouring pencils):

    • nothing = white
    • cyan + magenta = blue
    • magenta + yellow = red
    • yellow + cyan = green
    • cyan + magenta + yellow = black