#21663B
Closest named color: Spruce (#0A5F38). oklch(45.5% 0.098 152.6), rgb(33, 102, 59).
Aa
White text reads best on this color (6.93:1).
About this color
#21663B is a medium-dark, moderately saturated green. In OKLCH its lightness is 46%, its chroma 0.098 and its hue 153°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Spruce (#0A5F38), ΔE 0.027 away. White text reads best on it, at 6.93:1.
| Hue family | Greens |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.098) |
| Temperature | in between |
| Nearest name | Spruce (#0A5F38) |
| Black text | 3.02:1 |
| White text | 6.93:1 |
Values
| HEX | #21663B |
| RGB | rgb(33, 102, 59) |
| HSL | hsl(143, 51%, 26%) |
| OKLCH | oklch(45.5% 0.098 152.6) |
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 #21663B | 6.93:1 | AA | Lc -88.7 | Fine for body text |
| Black text on #21663B | 3.02:1 | AA large text | Lc 20.3 | Dividers and decoration only |
| #21663B text on white | 6.93:1 | AA | Lc 83.7 | Fine for body text |
| #21663B text on black | 3.02:1 | AA large text | Lc -18.3 | 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 800.
-
Step 50
50
#F2F7F3
oklch(97.1% 0.007 151.9)
-
Step 100
100
#E2EDE5
oklch(93.6% 0.016 154.5)
-
Step 200
200
#CAE0CF
oklch(88.6% 0.033 152.4)
-
Step 300
300
#A5CCAF
oklch(80.9% 0.058 152.8)
-
Step 400
400
#73B185
oklch(70.6% 0.091 152.7)
-
Step 500
500
#4A9E66
oklch(63.2% 0.118 152.5)
-
Step 600
600
#26884D
oklch(55.6% 0.127 152.5)
-
Step 700
700
#16733E
oklch(49% 0.118 152.6)
-
Step 800
800 (this color)
#21663B
oklch(45.5% 0.098 152.6)
-
Step 900
900
#1B4D2D
oklch(37.7% 0.077 152.6)
-
Step 950
950
#122D1B
oklch(27% 0.047 152.8)
#21663B 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) | #665D38 | 0.085 |
| Deuteranopia (no green cones) | #5D573E | 0.083 |
| Tritanopia (no blue cones) | #04655B | 0.050 |
| Achromatopsia (no color) | #5A5A5A | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21663B
#21663B
oklch(45.5% 0.098 152.6)
- #76406E
#76406E
oklch(45.5% 0.098 332.7)
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 #21663B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Spruce #0A5F38 ΔE 0.027
- Pine #2B5D34 ΔE 0.027
- Dark Green Blue #1F6357 ΔE 0.047
- Camouflage Green #4B6113 ΔE 0.050
- Army Green #4B5D16 ΔE 0.051
- Camo Green #526525 ΔE 0.052
- Dark Green #006400 ΔE 0.058
- Dark Olive Green #556B2F ΔE 0.059
Use #21663B 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.