#51581F
Closest named color: Army Green (#4B5D16). oklch(44.1% 0.08 115.6), rgb(81, 88, 31).
Aa
White text reads best on this color (7.59:1).
About this color
#51581F is a dark, moderately saturated brown. In OKLCH its lightness is 44%, its chroma 0.080 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 0.021 away. White text reads best on it, at 7.59:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.080) |
| Temperature | in between |
| Nearest name | Army Green (#4B5D16) |
| Black text | 2.76:1 |
| White text | 7.59:1 |
Values
| HEX | #51581F |
| RGB | rgb(81, 88, 31) |
| HSL | hsl(67, 48%, 23%) |
| OKLCH | oklch(44.1% 0.08 115.6) |
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 #51581F | 7.59:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #51581F | 2.76:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #51581F text on white | 7.59:1 | AAA | Lc 86.3 | Fine for body text |
| #51581F text on black | 2.76:1 | Fails | Lc -15.7 | 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
#BFC5A3
oklch(81% 0.047 115.6)
-
Step 400
400
#9EA771
oklch(70.8% 0.075 116)
-
Step 500
500
#87914A
oklch(63.2% 0.096 115.8)
-
Step 600
600
#717A2B
oklch(55.5% 0.103 115.3)
-
Step 700
700
#5F671D
oklch(49.2% 0.096 115.3)
-
Step 800
800 (this color)
#51581F
oklch(44.1% 0.08 115.6)
-
Step 900
900
#40461C
oklch(37.8% 0.063 116.3)
-
Step 950
950
#262911
oklch(27.1% 0.04 115)
#51581F 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) | #5E5318 | 0.024 |
| Deuteranopia (no green cones) | #5E5423 | 0.025 |
| Tritanopia (no blue cones) | #56534C | 0.070 |
| Achromatopsia (no color) | #545454 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51581F
#51581F
oklch(44.1% 0.08 115.6)
- #57497A
#57497A
oklch(44.1% 0.08 296.1)
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 #51581F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Army Green #4B5D16 ΔE 0.021
- Green Brown #544E03 ΔE 0.030
- Olive Brown #645403 ΔE 0.032
- Camouflage Green #4B6113 ΔE 0.033
- Camo Green #526525 ΔE 0.039
- Pine #2B5D34 ΔE 0.047
- Navy Green #35530A ΔE 0.050
- Greeny Brown #696006 ΔE 0.050
Use #51581F 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.