#51371F
Closest named color: Charcoal Grey (#3C4142). oklch(36.1% 0.052 62.6), rgb(81, 55, 31).
Aa
White text reads best on this color (10.95:1).
About this color
#51371F is a dark, muted brown. In OKLCH its lightness is 36%, its chroma 0.052 and its hue 63°. Its hue sits on the warm side of the wheel. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.059 away. White text reads best on it, at 10.95:1.
| Hue family | Browns |
| Lightness | dark (36%) |
| Chroma | muted (0.052) |
| Temperature | warm |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.91:1 |
| White text | 10.95:1 |
Values
| HEX | #51371F |
| RGB | rgb(81, 55, 31) |
| HSL | hsl(29, 45%, 22%) |
| OKLCH | oklch(36.1% 0.052 62.6) |
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 #51371F | 10.95:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #51371F | 1.91:1 | Fails | Lc 8.6 | Not readable |
| #51371F text on white | 10.95:1 | AAA | Lc 95.3 | Preferred for body text |
| #51371F 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
#E4D6CB
oklch(88.4% 0.022 60.7)
-
Step 300
300
#D4BCA7
oklch(81% 0.04 63.4)
-
Step 400
400
#BD9878
oklch(70.6% 0.063 62.4)
-
Step 500
500
#AC7F55
oklch(63.1% 0.08 63.6)
-
Step 600
600
#98673A
oklch(55.6% 0.088 62)
-
Step 700
700
#81562C
oklch(49.1% 0.081 63.3)
-
Step 800
800
#694626
oklch(42.6% 0.067 61.9)
-
Step 900
900 (this color)
#51371F
oklch(36.1% 0.052 62.6)
-
Step 950
950
#322315
oklch(27% 0.033 63.7)
#51371F 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) | #3F391D | 0.035 |
| Deuteranopia (no green cones) | #453F1F | 0.032 |
| Tritanopia (no blue cones) | #583131 | 0.040 |
| Achromatopsia (no color) | #3C3C3C | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51371F
#51371F
oklch(36.1% 0.052 62.6)
- #234157
#234157
oklch(36.2% 0.053 242)
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 #51371F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.059
- Mud Brown #60460F ΔE 0.061
- Dark Olive #373E02 ΔE 0.065
- Purple Brown #673A3F ΔE 0.067
- Onyx #343A40 ΔE 0.068
- Chestnut #742802 ΔE 0.074
- Pakistan Green #283618 ΔE 0.076
- Green Brown #544E03 ΔE 0.081
Use #51371F 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.