#166A21 Color
#166A21 is rgb(22, 106, 33) in RGB, hsl(128, 66%, 25%) in HSL, and about cmyk(79%, 0%, 69%, 58%) in CMYK. It has no registered color name of its own — the closest is La Salle Green (#087830), clearly related but distinguishable side by side at ΔE 6.96. White text is the more readable choice on this background.
#166A21rgb(22, 106, 33)hsl(128, 66%, 25%)hsv(128, 79%, 42%)cmyk(79%, 0%, 69%, 58%)oklch(46% 0.133 144.8)lab(38.90% -37.23 32.34)lch(38.90% 49.31 139.02)What #166A21 Is Called
Most hex codes have no name: there are 16.7 million of them and a few thousand registered names. These are the named colors nearest to #166A21, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.
Browse the full index of named colors A-Z or every green in the library.
#166A21 Channel Values
How #166A21 breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.
| Model | Channels | Notes |
|---|---|---|
| RGB | R 22 · G 106 · B 33 | 8-bit channels as sent to the display |
| HSL | H 128° · S 66% · L 25% | Easiest model for building lighter and darker variants |
| HSV | H 128° · S 79% · V 42% | Matches the picker in most design tools |
| CMYK | C 79% · M 0% · Y 69% · K 58% | Approximate ink mix; confirm with an ICC profile before printing |
| Luminance | 6.74:1 vs white · 3.12:1 vs black | WCAG 2.2 relative-luminance contrast ratios |
Text Contrast & Accessibility
WCAG 2.2 contrast ratios for text on a #166A21 background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Contrast is one check, not a full accessibility review.
Need a specific ratio against another background? Open #166A21 in the contrast checker.
Colors That Go With #166A21
Pairings derived from color-wheel relationships. The complementary color sits opposite #166A21; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.
Tints & Shades of #166A21
Lighter tints and darker shades built by moving the lightness channel while holding hue and saturation, which is what you want for hover states, backgrounds, and text variants.
Want a full 50-950 ramp with semantic roles? Generate design tokens from #166A21.
How #166A21 Looks with Color Vision Deficiency
Simulated with the Viénot, Brettel & Mollon LMS projection model. Anomalous types are rendered as partial versions of the matching dichromacy, which is an approximation rather than a per-person clinical model.
#166A21#626222#4E6521#595926#476024#2B6464#246751#5C5C5CUsing #166A21 in Code
Copy-ready declarations for the places this color usually ends up.
--color-166a21: #166A21;background-color: #166A21;colors: { 'color-166a21': '#166A21' }Color(red: 0.086, green: 0.416, blue: 0.129)<color name="color_166a21">#166A21</color>fill="#166A21"More Green Colors
#166A21 sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.
#166A21 Frequently Asked Questions
What color is #166A21?
#166A21 is a dark green — rgb(22, 106, 33) in RGB and hsl(128, 66%, 25%) in HSL. It carries no registered color name of its own; the closest named color is La Salle Green (#087830), which is clearly related but distinguishable side by side at a CIE76 distance of 6.96.
What is the RGB value of #166A21?
#166A21 is rgb(22, 106, 33) — red 22, green 106, and blue 33 on the 0-255 scale.
What is the CMYK value of #166A21?
#166A21 converts to approximately cmyk(79%, 0%, 69%, 58%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.
Should text on #166A21 be black or white?
White text is the more readable choice. #166A21 scores 6.74:1 against white and 3.12:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.
Can I write #166A21 as a CSS color keyword?
No. #166A21 is not one of the CSS color keywords, so it has to be written as a hex, rgb() or hsl() value. The closest keyword is darkgreen (#006400) at a CIE76 distance of 9.22, which is clearly related but distinguishable side by side.
Open #166A21 in a Tool
Keep exploring: every green in the color library, the guide to shades of green, or the full color library.