#21783B Color
#21783B is rgb(33, 120, 59) in RGB, hsl(138, 57%, 30%) in HSL, and about cmyk(73%, 0%, 51%, 53%) in CMYK. It has no registered color name of its own — the closest is Dartmouth Green (#00703C), clearly related but distinguishable side by side at ΔE 5.9. White text is the more readable choice on this background.
#21783Brgb(33, 120, 59)hsl(138, 57%, 30%)hsv(138, 73%, 47%)cmyk(73%, 0%, 51%, 53%)oklch(50.7% 0.125 149.3)lab(44.33% -37.32 25.63)lch(44.33% 45.28 145.52)What #21783B 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 #21783B, 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.
#21783B Channel Values
How #21783B 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 33 · G 120 · B 59 | 8-bit channels as sent to the display |
| HSL | H 138° · S 57% · L 30% | Easiest model for building lighter and darker variants |
| HSV | H 138° · S 73% · V 47% | Matches the picker in most design tools |
| CMYK | C 73% · M 0% · Y 51% · K 53% | Approximate ink mix; confirm with an ICC profile before printing |
| Luminance | 5.51:1 vs white · 3.81:1 vs black | WCAG 2.2 relative-luminance contrast ratios |
Text Contrast & Accessibility
WCAG 2.2 contrast ratios for text on a #21783B 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 #21783B in the contrast checker.
Colors That Go With #21783B
Pairings derived from color-wheel relationships. The complementary color sits opposite #21783B; 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 #21783B
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 #21783B.
How #21783B 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.
#21783B#6F6F3C#5A733B#65653E#526D3D#337272#2D7561#696969Using #21783B in Code
Copy-ready declarations for the places this color usually ends up.
--color-21783b: #21783B;background-color: #21783B;colors: { 'color-21783b': '#21783B' }Color(red: 0.129, green: 0.471, blue: 0.231)<color name="color_21783b">#21783B</color>fill="#21783B"More Green Colors
#21783B sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.
#21783B Frequently Asked Questions
What color is #21783B?
#21783B is a dark green — rgb(33, 120, 59) in RGB and hsl(138, 57%, 30%) in HSL. It carries no registered color name of its own; the closest named color is Dartmouth Green (#00703C), which is clearly related but distinguishable side by side at a CIE76 distance of 5.9.
What is the RGB value of #21783B?
#21783B is rgb(33, 120, 59) — red 33, green 120, and blue 59 on the 0-255 scale.
What is the CMYK value of #21783B?
#21783B converts to approximately cmyk(73%, 0%, 51%, 53%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.
Should text on #21783B be black or white?
White text is the more readable choice. #21783B scores 5.51:1 against white and 3.81:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.
Can I write #21783B as a CSS color keyword?
No. #21783B 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 seagreen (#2E8B57) at a CIE76 distance of 9.39, which is clearly related but distinguishable side by side.
Open #21783B in a Tool
Keep exploring: every green in the color library, the guide to shades of green, or the full color library.