#51371E
Closest named color: Mud Brown (#60460F). oklch(36.1% 0.053 63.7), rgb(81, 55, 30).
Aa
White text reads best on this color (10.96:1).
About this color
#51371E is a dark, muted brown. In OKLCH its lightness is 36%, its chroma 0.053 and its hue 64°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.060 away. White text reads best on it, at 10.96:1.
| Hue family | Browns |
| Lightness | dark (36%) |
| Chroma | muted (0.053) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 1.91:1 |
| White text | 10.96:1 |
Values
| HEX | #51371E |
| RGB | rgb(81, 55, 30) |
| HSL | hsl(29, 46%, 22%) |
| OKLCH | oklch(36.1% 0.053 63.7) |
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 #51371E | 10.96:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #51371E | 1.91:1 | Fails | Lc 8.6 | Not readable |
| #51371E text on white | 10.96:1 | AAA | Lc 95.3 | Preferred for body text |
| #51371E text on black | 1.91:1 | Fails | Lc -7.4 | 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
#F8F5F2
oklch(97.2% 0.005 67.8)
-
Step 100
100
#F0E8E2
oklch(93.6% 0.012 59.6)
-
Step 200
200
#E4D6CA
oklch(88.4% 0.022 63.2)
-
Step 300
300
#D4BCA7
oklch(81% 0.04 63.4)
-
Step 400
400
#BD9977
oklch(70.8% 0.064 64.9)
-
Step 500
500
#AD7F54
oklch(63.2% 0.082 63.5)
-
Step 600
600
#986738
oklch(55.6% 0.089 63)
-
Step 700
700
#81562A
oklch(49.1% 0.082 64.4)
-
Step 800
800
#694624
oklch(42.6% 0.068 63.3)
-
Step 900
900 (this color)
#51371E
oklch(36.1% 0.053 63.7)
-
Step 950
950
#322315
oklch(27% 0.033 63.7)
#51371E 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) | #3F391C | 0.035 |
| Deuteranopia (no green cones) | #453F1E | 0.032 |
| Tritanopia (no blue cones) | #583131 | 0.041 |
| Achromatopsia (no color) | #3C3C3C | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51371E
#51371E
oklch(36.1% 0.053 63.7)
- #234057
#234057
oklch(36% 0.053 244)
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 #51371E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.060
- Charcoal Grey #3C4142 ΔE 0.060
- Dark Olive #373E02 ΔE 0.064
- Purple Brown #673A3F ΔE 0.068
- Onyx #343A40 ΔE 0.068
- Chestnut #742802 ΔE 0.074
- Pakistan Green #283618 ΔE 0.076
- Green Brown #544E03 ΔE 0.080
Use #51371E 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.