#51372D
Closest named color: Charcoal Grey (#3C4142). oklch(36.4% 0.041 41.9), rgb(81, 55, 45).
Aa
White text reads best on this color (10.85:1).
About this color
#51372D is a dark, muted brown. In OKLCH its lightness is 36%, its chroma 0.041 and its hue 42°. Its hue sits on the warm side of the wheel. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.048 away. White text reads best on it, at 10.85:1.
| Hue family | Browns |
| Lightness | dark (36%) |
| Chroma | muted (0.041) |
| Temperature | warm |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.93:1 |
| White text | 10.85:1 |
Values
| HEX | #51372D |
| RGB | rgb(81, 55, 45) |
| HSL | hsl(17, 29%, 25%) |
| OKLCH | oklch(36.4% 0.041 41.9) |
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 #51372D | 10.85:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #51372D | 1.93:1 | Fails | Lc 8.8 | Not readable |
| #51372D text on white | 10.85:1 | AAA | Lc 95.1 | Preferred for body text |
| #51372D 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
#F8F5F3
oklch(97.2% 0.004 56.4)
-
Step 100
100
#EFE8E5
oklch(93.6% 0.009 44.9)
-
Step 200
200
#E4D6D0
oklch(88.6% 0.018 44.8)
-
Step 300
300
#D3BBB1
oklch(81% 0.031 44)
-
Step 400
400
#BC9789
oklch(70.7% 0.049 41.7)
-
Step 500
500
#AB7D6C
oklch(63.1% 0.063 41.2)
-
Step 600
600
#966653
oklch(55.6% 0.069 42.4)
-
Step 700
700
#805544
oklch(49.2% 0.063 42.4)
-
Step 800
800
#684538
oklch(42.6% 0.053 41.2)
-
Step 900
900 (this color)
#51372D
oklch(36.4% 0.041 41.9)
-
Step 950
950
#32221C
oklch(27% 0.027 41.4)
#51372D 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) | #3D3A2C | 0.038 |
| Deuteranopia (no green cones) | #443F2D | 0.033 |
| Tritanopia (no blue cones) | #573334 | 0.022 |
| Achromatopsia (no color) | #3D3D3D | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51372D
#51372D
oklch(36.4% 0.041 41.9)
- #24434E
#24434E
oklch(36.4% 0.041 223)
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 #51372D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.048
- Purple Brown #673A3F ΔE 0.054
- Onyx #343A40 ΔE 0.057
- Mud Brown #60460F ΔE 0.071
- Chestnut #742802 ΔE 0.078
- Dark Olive #373E02 ΔE 0.080
- Gunmetal #293241 ΔE 0.083
- Pakistan Green #283618 ΔE 0.084
Use #51372D 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.