#51381A
Closest named color: Mud Brown (#60460F). oklch(36.2% 0.057 69.3), rgb(81, 56, 26).
Aa
White text reads best on this color (10.87:1).
About this color
#51381A is a dark, muted brown. In OKLCH its lightness is 36%, its chroma 0.057 and its hue 69°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.056 away. White text reads best on it, at 10.87:1.
| Hue family | Browns |
| Lightness | dark (36%) |
| Chroma | muted (0.057) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 1.93:1 |
| White text | 10.87:1 |
Values
| HEX | #51381A |
| RGB | rgb(81, 56, 26) |
| HSL | hsl(33, 51%, 21%) |
| OKLCH | oklch(36.2% 0.057 69.3) |
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 #51381A | 10.87:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #51381A | 1.93:1 | Fails | Lc 8.8 | Not readable |
| #51381A text on white | 10.87:1 | AAA | Lc 95.1 | Preferred for body text |
| #51381A text on black | 1.93:1 | Fails | Lc -7.6 | 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
#F8F5F1
oklch(97.1% 0.006 75.4)
-
Step 100
100
#EFE9E1
oklch(93.7% 0.013 75.4)
-
Step 200
200
#E4D7C9
oklch(88.6% 0.024 69.6)
-
Step 300
300
#D3BCA4
oklch(80.8% 0.042 68.4)
-
Step 400
400
#BD9972
oklch(70.7% 0.068 68.6)
-
Step 500
500
#AC804D
oklch(63.2% 0.087 69.2)
-
Step 600
600
#97682F
oklch(55.5% 0.095 68.8)
-
Step 700
700
#815721
oklch(49.2% 0.089 69.6)
-
Step 800
800
#69471E
oklch(42.7% 0.073 68.6)
-
Step 900
900 (this color)
#51381A
oklch(36.2% 0.057 69.3)
-
Step 950
950
#322312
oklch(27% 0.036 68.7)
#51381A 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) | #403917 | 0.033 |
| Deuteranopia (no green cones) | #463F1B | 0.028 |
| Tritanopia (no blue cones) | #583231 | 0.045 |
| Achromatopsia (no color) | #3D3D3D | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51381A
#51381A
oklch(36.2% 0.057 69.3)
- #25405A
#25405A
oklch(36.2% 0.056 248.7)
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 #51381A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.056
- Dark Olive #373E02 ΔE 0.060
- Charcoal Grey #3C4142 ΔE 0.063
- Purple Brown #673A3F ΔE 0.071
- Onyx #343A40 ΔE 0.072
- Chestnut #742802 ΔE 0.074
- Pakistan Green #283618 ΔE 0.075
- Green Brown #544E03 ΔE 0.075
Use #51381A 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.