Android Oreo(

4 years ago from Raffaello Sanzio, "Designers Should Code" Activist

  • Marc EdwardsMarc Edwards, 4 years ago

    I am working on some articles on the topic right now.

    Probably the simplest explanation I can give is: Colour management means colours are defined within a colour space. It helps different devices attempt to represent the same apparent colour, even if the values used on those devices are different.

    A colour with a colour space (“#ff0000 in sRGB”) means it can be mapped to a precise location in the visible spectrum.

    A colour without a colour space (“#ff0000”) doesn’t have much meaning. It’s probably a bright red, but we can’t really know unless we also know the colour space it is defined in.

    I hope that makes some sense.

    4 points
    • Cristian MoiseiCristian Moisei, 4 years ago

      to my knowledge, a monitor has 3 LEDs for each pixel, one for red, one for green and one for blue, and depending on the intensity at which each of them shines, you get a specific colour.

      Where do the differences come from? What other factors are there in the way displays render colours?

      0 points
      • Marc EdwardsMarc Edwards, 4 years ago

        You can definitely consider each pixel to be three little lights. There’s many subpixel patterns used in displays, so they’re not all red, green and blue elements alongside each other.

        LCD displays (branded as IPS, TN and “LED” for related tech) have a white backlight with filters to block the light, so each pixel doesn’t generate light, it blocks the light behind it. OLED is closer to your description, where each element produces light (organic light emitting diode).

        There’s many reasons why there’s differences between displays. Maybe the best way to explain it is with light bulbs. If you bought lots of different kinds of white light bulbs, they’d all look a bit different. This would be especially true if you the bulbs were based on different tech — LED, compact fluorescent, tungsten. They’d have different maximum brightnesses, some would be more orange, some would be bluer. And, if you attached them to a dimmer, they would have different characteristics as you changed the dimmer’s position.

        That’s not a perfect analogy, but should help demonstrate that different displays have different abilities.

        Colour management is an attempt to get the same actual colour to appear across many displays, despite the differences in the displays.

        1 point