#21510B
Closest named color: Forest (#0B5509). oklch(38.7% 0.111 138.2), rgb(33, 81, 11).
Aa
White text reads best on this color (9.34:1).
About this color
#21510B is a dark, moderately saturated green. In OKLCH its lightness is 39%, its chroma 0.111 and its hue 138°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Forest (#0B5509), ΔE 0.018 away. White text reads best on it, at 9.34:1.
| Hue family | Greens |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.111) |
| Temperature | in between |
| Nearest name | Forest (#0B5509) |
| Black text | 2.24:1 |
| White text | 9.34:1 |
Values
| HEX | #21510B |
| RGB | rgb(33, 81, 11) |
| HSL | hsl(101, 76%, 18%) |
| OKLCH | oklch(38.7% 0.111 138.2) |
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 #21510B | 9.34:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #21510B | 2.24:1 | Fails | Lc 12.7 | Not readable |
| #21510B text on white | 9.34:1 | AAA | Lc 91.3 | Preferred for body text |
| #21510B text on black | 2.24:1 | Fails | Lc -11.1 | Not readable |
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 900.
-
Step 50
50
#F2F7F0
oklch(97% 0.011 136.6)
-
Step 100
100
#E2EEDF
oklch(93.6% 0.024 139.4)
-
Step 200
200
#CBE1C4
oklch(88.6% 0.046 138.1)
-
Step 300
300
#A6CE9A
oklch(80.9% 0.083 138.5)
-
Step 400
400
#75B460
oklch(70.7% 0.133 138.3)
-
Step 500
500
#4EA02C
oklch(63.1% 0.17 138.2)
-
Step 600
600
#358900
oklch(55.6% 0.173 138.2)
-
Step 700
700
#2B7300
oklch(49% 0.152 138.2)
-
Step 800
800
#225F00
oklch(42.8% 0.133 138.3)
-
Step 900
900 (this color)
#21510B
oklch(38.7% 0.111 138.2)
-
Step 950
950
#132E08
oklch(27% 0.07 138)
#21510B 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) | #544900 | 0.072 |
| Deuteranopia (no green cones) | #4E4513 | 0.072 |
| Tritanopia (no blue cones) | #1D4E44 | 0.076 |
| Achromatopsia (no color) | #474747 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21510B
#21510B
oklch(38.7% 0.111 138.2)
- #5C2D6A
#5C2D6A
oklch(38.7% 0.112 318)
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 #21510B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Forest #0B5509 ΔE 0.018
- Navy Green #35530A ΔE 0.024
- Deep Green #02590F ΔE 0.028
- Bottle Green #044A05 ΔE 0.033
- Darkgreen #054907 ΔE 0.035
- British Racing Green #05480D ΔE 0.038
- Pine Green #0A481E ΔE 0.042
- Racing Green #014600 ΔE 0.046
Use #21510B 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.