Color - Achromatic (Without hue)

About

achromatic colors are colors without hue:

• white
• black
• gray
• and all colors on the grayscale

They does not come from the visible light spectrum.

They shows:

• the totale absence of light reflection (black)
• or the highly reflecting/transmitting characteristic of the object surface of all colors (white).
• or a mix of (gray)

From Hue to Achromatic Color

To create an achromatic color from a hue color, you mix at equal quantity:

• two opponent color
• or three primary or secondary colors
• …

They cancel each other and create a grayscale color.

Example: A greyscale of 4 colors, with the Rgb colorspace:

• when the channels are equal, the function gives a grayscale color.
• the higher the percentage, the higher the lightness

<div id="swatches">
    <div style="background-color:rgb(10%,10%,10%)"> </div>
    <div style="background-color:rgb(80%, 80%, 80%)"> </div>
    <div style="background-color:rgb(95%, 95%, 95%)"> </div>
</div>