#21781B
Closest named color: Tree Green (#2A7E19). oklch(50.3% 0.151 142.2), rgb(33, 120, 27).
Aa
White text reads best on this color (5.57:1).
About this color
#21781B is a medium-dark, vivid green. In OKLCH its lightness is 50%, its chroma 0.151 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Tree Green (#2A7E19), ΔE 0.021 away. White text reads best on it, at 5.57:1.
| Hue family | Greens |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.151) |
| Temperature | in between |
| Nearest name | Tree Green (#2A7E19) |
| Black text | 3.76:1 |
| White text | 5.57:1 |
Values
| HEX | #21781B |
| RGB | rgb(33, 120, 27) |
| HSL | hsl(116, 63%, 29%) |
| OKLCH | oklch(50.3% 0.151 142.2) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #21781B | 5.57:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #21781B | 3.76:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #21781B text on white | 5.57:1 | AA | Lc 77.4 | Fine for body text |
| #21781B text on black | 3.76:1 | AA large text | Lc -24.4 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#F2F7F1
oklch(97.1% 0.01 140.5)
-
Step 100
100
#E2EEE1
oklch(93.7% 0.021 143.2)
-
Step 200
200
#CBE0C8
oklch(88.4% 0.039 141.7)
-
Step 300
300
#A6CDA2
oklch(80.9% 0.073 142.4)
-
Step 400
400
#75B36E
oklch(70.7% 0.117 141.9)
-
Step 500
500
#4D9F46
oklch(63% 0.149 142.1)
-
Step 600
600
#2B8925
oklch(55.5% 0.162 142.2)
-
Step 700
700 (this color)
#21781B
oklch(50.3% 0.151 142.2)
-
Step 800
800
#1B5F16
oklch(42.7% 0.125 142.1)
-
Step 900
900
#1D4E1A
oklch(37.7% 0.097 142.4)
-
Step 950
950
#122E10
oklch(27.1% 0.063 142.4)
#21781B with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #7B6C08 | 0.106 |
| Deuteranopia (no green cones) | #716525 | 0.107 |
| Tritanopia (no blue cones) | #097466 | 0.098 |
| Achromatopsia (no color) | #686868 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21781B
#21781B
oklch(50.3% 0.151 142.2)
- #8A4096
#8A4096
oklch(50.2% 0.151 321.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #21781B, closest first.
No curated palette has a color within ΔE 0.04 of #21781B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tree Green #2A7E19 ΔE 0.021
- Green #008000 ΔE 0.031
- Dark Grass Green #388004 ΔE 0.034
- Jungle Green #048243 ΔE 0.042
- Forest Green #228B22 ΔE 0.058
- Dark Green #006400 ΔE 0.067
- Emerald Green #028F1E ΔE 0.069
- Dark Olive Green #556B2F ΔE 0.070
Use #21781B in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.