#51372B
Closest named color: Charcoal Grey (#3C4142). oklch(36.3% 0.042 45.7), rgb(81, 55, 43).
Aa
White text reads best on this color (10.87:1).
About this color
#51372B is a dark, muted brown. In OKLCH its lightness is 36%, its chroma 0.042 and its hue 46°. Its hue sits on the warm side of the wheel. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.050 away. White text reads best on it, at 10.87:1.
| Hue family | Browns |
| Lightness | dark (36%) |
| Chroma | muted (0.042) |
| Temperature | warm |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.93:1 |
| White text | 10.87:1 |
Values
| HEX | #51372B |
| RGB | rgb(81, 55, 43) |
| HSL | hsl(19, 31%, 24%) |
| OKLCH | oklch(36.3% 0.042 45.7) |
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 #51372B | 10.87:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #51372B | 1.93:1 | Fails | Lc 8.8 | Not readable |
| #51372B text on white | 10.87:1 | AAA | Lc 95.1 | Preferred for body text |
| #51372B text on black | 1.93:1 | Fails | Lc -7.5 | 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
#D3BBB0
oklch(80.9% 0.032 46.2)
-
Step 400
400
#BC9786
oklch(70.6% 0.051 46)
-
Step 500
500
#AB7D68
oklch(63% 0.065 45.6)
-
Step 600
600
#966650
oklch(55.5% 0.07 45.5)
-
Step 700
700
#805541
oklch(49.2% 0.065 45.7)
-
Step 800
800
#684535
oklch(42.6% 0.055 45.4)
-
Step 900
900 (this color)
#51372B
oklch(36.3% 0.042 45.7)
-
Step 950
950
#32221B
oklch(26.9% 0.028 44.6)
#51372B 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) | #3E3A2A | 0.036 |
| Deuteranopia (no green cones) | #443F2B | 0.033 |
| Tritanopia (no blue cones) | #573334 | 0.025 |
| Achromatopsia (no color) | #3D3D3D | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51372B
#51372B
oklch(36.3% 0.042 45.7)
- #24434F
#24434F
oklch(36.4% 0.042 225)
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 #51372B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.050
- Purple Brown #673A3F ΔE 0.055
- Onyx #343A40 ΔE 0.058
- Mud Brown #60460F ΔE 0.069
- Chestnut #742802 ΔE 0.077
- Dark Olive #373E02 ΔE 0.078
- Pakistan Green #283618 ΔE 0.082
- Gunmetal #293241 ΔE 0.084
Use #51372B 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.