Colors
Describing continuous phenomenon like light with discrete increments always requires a little flexibility. For example, at what point on the spectrum does the color change from yellow to green? Different people will place that point in different places. You can see from figure 1 the basic Kryptonian color words, and approximately where they lie on the electromagnetic spectrum.
Nuances of Color
In Kryptonian, there are two color prefixes. gAd moves a color towards the red end of the spectrum, while kü moves a color towards the violet end of the spectrum. So, for example, English "yellow-green" would be riz in Kryptonian, while English "yellow" would be Kryptonian gAdriz. As can be expected, this gets fuzzy at the color boundaries—at what point does küâ (orange) become gAdriz (yellow)?
Note: When forming the word /kur + riz/, you only use one /r/: küiz.
Brown
Not pictured above is the color brown: SOtev. This color word does not take the gAd or kü prefixes, but it does take the bright/dark prefixes (see below).
Black, White, and Gray
Black, dol, and white, kriG, each have a prefixing form (leave off the final consonant) that can be applied to any color for "bright" or "dark". For example, red: â, can become bright red (or pink): kriâ, or dark red: doâ.