X11 Color Names - Color Variations

Color Variations

For 78 colors as listed above, rgb.txt offers four variants ‘color 1’, ‘color 2’, ‘color 3’, and ‘color 4’, with ‘color 1’ corresponding to ‘color’, so e.g. ‘Snow 1’ is the same as ‘Snow’. These variations are neither supported by popular browsers nor adopted by W3C standards.

The formulae used to determine the RGB values for these variations appear to be somewhere near

color 2 := color × 93.2%
color 3 := color × 80.4%
color 4 := color × 54.8%

Examples:

  • 205.2 = 255 × 80.4/100 and 192.96 = 240 × 80.4/100 explain ‘Ivory 3’ (205, 205, 196)  based on ‘Ivory’ (255, 255, 240) .
  • 139.74 = 255 × 54.8/100 and 131.52 = 240 × 54.8/100 are close to ‘Azure 4’ (131, 139, 139)  based on ‘Azure’ (240, 255, 255) .
  • 237.66 = 255 × 93.2/100 yields ‘Yellow 2’ (238, 238, 0)  based on ‘Yellow’ (255, 255, 0) .

Read more about this topic:  X11 Color Names

Famous quotes containing the words color and/or variations:

    When a bachelor of philosophy from the Antilles refuses to apply for certification as a teacher on the grounds of his color I say that philosophy has never saved anyone. When someone else strives and strains to prove to me that black men are as intelligent as white men I say that intelligence has never saved anyone: and that is true, for, if philosophy and intelligence are invoked to proclaim the equality of men, they have also been employed to justify the extermination of men.
    Frantz Fanon (1925–1961)

    I may be able to spot arrowheads on the desert but a refrigerator is a jungle in which I am easily lost. My wife, however, will unerringly point out that the cheese or the leftover roast is hiding right in front of my eyes. Hundreds of such experiences convince me that men and women often inhabit quite different visual worlds. These are differences which cannot be attributed to variations in visual acuity. Man and women simply have learned to use their eyes in very different ways.
    Edward T. Hall (b. 1914)