#51591E
Closest named color: Army Green (#4B5D16). oklch(44.4% 0.082 116.4), rgb(81, 89, 30).
Aa
White text reads best on this color (7.50:1).
About this color
#51591E is a dark, moderately saturated brown. In OKLCH its lightness is 44%, its chroma 0.082 and its hue 116°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Army Green (#4B5D16), ΔE 0.018 away. White text reads best on it, at 7.50:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.082) |
| Temperature | in between |
| Nearest name | Army Green (#4B5D16) |
| Black text | 2.79:1 |
| White text | 7.50:1 |
Values
| HEX | #51591E |
| RGB | rgb(81, 89, 30) |
| HSL | hsl(68, 50%, 23%) |
| OKLCH | oklch(44.4% 0.082 116.4) |
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 #51591E | 7.50:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #51591E | 2.79:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #51591E text on white | 7.50:1 | AAA | Lc 86.0 | Fine for body text |
| #51591E text on black | 2.79:1 | Fails | Lc -16.0 | 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
#F5F6F1
oklch(97.1% 0.007 115.7)
-
Step 100
100
#E9EBE1
oklch(93.6% 0.013 115.8)
-
Step 200
200
#D8DCC8
oklch(88.6% 0.027 116.1)
-
Step 300
300
#BEC5A2
oklch(80.9% 0.048 116.7)
-
Step 400
400
#9DA76F
oklch(70.7% 0.077 116.7)
-
Step 500
500
#869148
oklch(63.1% 0.098 116.4)
-
Step 600
600
#707B28
oklch(55.7% 0.107 116.4)
-
Step 700
700
#5E671A
oklch(49% 0.099 116)
-
Step 800
800 (this color)
#51591E
oklch(44.4% 0.082 116.4)
-
Step 900
900
#40461B
oklch(37.8% 0.064 116.2)
-
Step 950
950
#252911
oklch(27% 0.04 117)
#51591E 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) | #5F5417 | 0.025 |
| Deuteranopia (no green cones) | #5F5522 | 0.027 |
| Tritanopia (no blue cones) | #56544D | 0.072 |
| Achromatopsia (no color) | #555555 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51591E
#51591E
oklch(44.4% 0.082 116.4)
- #58497C
#58497C
oklch(44.3% 0.083 296.4)
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 #51591E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Army Green #4B5D16 ΔE 0.018
- Camouflage Green #4B6113 ΔE 0.030
- Olive Brown #645403 ΔE 0.032
- Green Brown #544E03 ΔE 0.033
- Camo Green #526525 ΔE 0.036
- Pine #2B5D34 ΔE 0.047
- Greeny Brown #696006 ΔE 0.047
- Navy Green #35530A ΔE 0.050
Use #51591E 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.