#51631B
Closest named color: Camo Green (#526525). oklch(46.9% 0.098 122.4), rgb(81, 99, 27).
Aa
White text reads best on this color (6.66:1).
About this color
#51631B is a medium-dark, moderately saturated brown. In OKLCH its lightness is 47%, its chroma 0.098 and its hue 122°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Camo Green (#526525), ΔE 0.010 away. White text reads best on it, at 6.66:1.
| Hue family | Browns |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.098) |
| Temperature | in between |
| Nearest name | Camo Green (#526525) |
| Black text | 3.15:1 |
| White text | 6.66:1 |
Values
| HEX | #51631B |
| RGB | rgb(81, 99, 27) |
| HSL | hsl(75, 57%, 25%) |
| OKLCH | oklch(46.9% 0.098 122.4) |
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 #51631B | 6.66:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #51631B | 3.15:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #51631B text on white | 6.66:1 | AA | Lc 82.8 | Fine for body text |
| #51631B text on black | 3.15:1 | AA large text | Lc -19.1 | 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
#F4F6F1
oklch(97% 0.007 124.4)
-
Step 100
100
#E8EBE1
oklch(93.5% 0.014 120.3)
-
Step 200
200
#D6DCC9
oklch(88.5% 0.026 121.2)
-
Step 300
300
#BBC6A4
oklch(80.9% 0.048 122)
-
Step 400
400
#98A973
oklch(70.8% 0.077 122.6)
-
Step 500
500
#7F934E
oklch(63.1% 0.097 122.5)
-
Step 600
600
#687D30
oklch(55.6% 0.106 122.7)
-
Step 700
700 (this color)
#51631B
oklch(46.9% 0.098 122.4)
-
Step 800
800
#47561E
oklch(42.7% 0.082 122.6)
-
Step 900
900
#3C471E
oklch(37.8% 0.064 122)
-
Step 950
950
#232A13
oklch(27.1% 0.04 123)
#51631B 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) | #695D10 | 0.039 |
| Deuteranopia (no green cones) | #675C21 | 0.041 |
| Tritanopia (no blue cones) | #555E55 | 0.082 |
| Achromatopsia (no color) | #5C5C5C | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51631B
#51631B
oklch(46.9% 0.098 122.4)
- #654C88
#654C88
oklch(46.9% 0.098 302)
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 #51631B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Camo Green #526525 ΔE 0.010
- Camouflage Green #4B6113 ΔE 0.013
- Army Green #4B5D16 ΔE 0.021
- Mud Green #606602 ΔE 0.027
- Dark Olive Green #556B2F ΔE 0.028
- Greeny Brown #696006 ΔE 0.036
- Dark Moss Green #606C38 ΔE 0.045
- Olive Brown #645403 ΔE 0.048
Use #51631B 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.