#51391C
Closest named color: Mud Brown (#60460F). oklch(36.5% 0.055 69.8), rgb(81, 57, 28).
Aa
White text reads best on this color (10.75:1).
About this color
#51391C is a dark, muted brown. In OKLCH its lightness is 36%, its chroma 0.055 and its hue 70°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.054 away. White text reads best on it, at 10.75:1.
| Hue family | Browns |
| Lightness | dark (36%) |
| Chroma | muted (0.055) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 1.95:1 |
| White text | 10.75:1 |
Values
| HEX | #51391C |
| RGB | rgb(81, 57, 28) |
| HSL | hsl(33, 49%, 21%) |
| OKLCH | oklch(36.5% 0.055 69.8) |
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 #51391C | 10.75:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #51391C | 1.95:1 | Fails | Lc 9.1 | Not readable |
| #51391C text on white | 10.75:1 | AAA | Lc 94.8 | Preferred for body text |
| #51391C text on black | 1.95:1 | Fails | Lc -7.8 | 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
#E3D7C9
oklch(88.5% 0.023 71.8)
-
Step 300
300
#D2BDA4
oklch(80.9% 0.042 72)
-
Step 400
400
#BC9A74
oklch(70.8% 0.066 69.6)
-
Step 500
500
#AA804F
oklch(63% 0.084 69.6)
-
Step 600
600
#966932
oklch(55.6% 0.092 69.3)
-
Step 700
700
#7F5724
oklch(49% 0.085 69.9)
-
Step 800
800
#684820
oklch(42.8% 0.07 70)
-
Step 900
900 (this color)
#51391C
oklch(36.5% 0.055 69.8)
-
Step 950
950
#312313
oklch(26.9% 0.034 69.2)
#51391C 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) | #413A19 | 0.031 |
| Deuteranopia (no green cones) | #47401D | 0.027 |
| Tritanopia (no blue cones) | #583332 | 0.044 |
| Achromatopsia (no color) | #3E3E3E | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51391C
#51391C
oklch(36.5% 0.055 69.8)
- #27405A
#27405A
oklch(36.4% 0.055 250.5)
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 #51391C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.054
- Dark Olive #373E02 ΔE 0.060
- Charcoal Grey #3C4142 ΔE 0.061
- Purple Brown #673A3F ΔE 0.070
- Onyx #343A40 ΔE 0.071
- Green Brown #544E03 ΔE 0.073
- Chestnut #742802 ΔE 0.075
- Pakistan Green #283618 ΔE 0.076
Use #51391C 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.