#21731B
Closest named color: Tree Green (#2A7E19). oklch(48.8% 0.145 142.1), rgb(33, 115, 27).
Aa
White text reads best on this color (5.94:1).
About this color
#21731B is a medium-dark, vivid green. In OKLCH its lightness is 49%, its chroma 0.145 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 0.036 away. White text reads best on it, at 5.94:1.
| Hue family | Greens |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.145) |
| Temperature | in between |
| Nearest name | Tree Green (#2A7E19) |
| Black text | 3.53:1 |
| White text | 5.94:1 |
Values
| HEX | #21731B |
| RGB | rgb(33, 115, 27) |
| HSL | hsl(116, 62%, 28%) |
| OKLCH | oklch(48.8% 0.145 142.1) |
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 #21731B | 5.94:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #21731B | 3.53:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #21731B text on white | 5.94:1 | AA | Lc 79.3 | Fine for body text |
| #21731B text on black | 3.53:1 | AA large text | Lc -22.5 | 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
#E3EEE1
oklch(93.7% 0.021 140.9)
-
Step 200
200
#CBE0C9
oklch(88.5% 0.038 142.8)
-
Step 300
300
#A7CDA3
oklch(81% 0.071 142.4)
-
Step 400
400
#77B271
oklch(70.6% 0.111 142.2)
-
Step 500
500
#519E4A
oklch(63% 0.142 142.1)
-
Step 600
600
#31892A
oklch(55.7% 0.156 142.1)
-
Step 700
700 (this color)
#21731B
oklch(48.8% 0.145 142.1)
-
Step 800
800
#1F5E1A
oklch(42.6% 0.119 142.1)
-
Step 900
900
#204D1C
oklch(37.6% 0.092 142)
-
Step 950
950
#142D11
oklch(26.9% 0.058 141.6)
#21731B 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) | #76680B | 0.101 |
| Deuteranopia (no green cones) | #6C6124 | 0.102 |
| Tritanopia (no blue cones) | #0D6F62 | 0.095 |
| Achromatopsia (no color) | #646464 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21731B
#21731B
oklch(48.8% 0.145 142.1)
- #853E8F
#853E8F
oklch(48.9% 0.145 322.6)
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 #21731B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tree Green #2A7E19 ΔE 0.036
- Green #008000 ΔE 0.045
- Dark Grass Green #388004 ΔE 0.048
- Jungle Green #048243 ΔE 0.051
- Dark Green #006400 ΔE 0.052
- Camouflage Green #4B6113 ΔE 0.063
- Dark Olive Green #556B2F ΔE 0.064
- Camo Green #526525 ΔE 0.065
Use #21731B 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.