#51403B
Closest named color: Charcoal Grey (#3C4142). oklch(38.8% 0.025 37), rgb(81, 64, 59).
Aa
White text reads best on this color (9.78:1).
About this color
#51403B is a dark close to neutral grey. In OKLCH its lightness is 39%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.036 away. White text reads best on it, at 9.78:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.14:1 |
| White text | 9.78:1 |
Values
| HEX | #51403B |
| RGB | rgb(81, 64, 59) |
| HSL | hsl(14, 16%, 27%) |
| OKLCH | oklch(38.8% 0.025 37) |
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 #51403B | 9.78:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #51403B | 2.14:1 | Fails | Lc 11.3 | Not readable |
| #51403B text on white | 9.78:1 | AAA | Lc 92.7 | Preferred for body text |
| #51403B text on black | 2.14:1 | Fails | Lc -9.8 | 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
#F7F5F4
oklch(97.1% 0.003 48.7)
-
Step 100
100
#EDE9E7
oklch(93.7% 0.005 48.7)
-
Step 200
200
#E0D7D4
oklch(88.5% 0.011 39.4)
-
Step 300
300
#CCBDB8
oklch(80.9% 0.018 39.4)
-
Step 400
400
#B29A93
oklch(70.6% 0.03 36.9)
-
Step 500
500
#9F8279
oklch(63.1% 0.038 37.9)
-
Step 600
600
#8A6B62
oklch(55.6% 0.042 36.8)
-
Step 700
700
#755951
oklch(49% 0.039 36.5)
-
Step 800
800
#5F4942
oklch(42.7% 0.032 38.4)
-
Step 900
900 (this color)
#51403B
oklch(38.8% 0.025 37)
-
Step 950
950
#2E2421
oklch(27.1% 0.016 37.3)
#51403B 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) | #44423B | 0.023 |
| Deuteranopia (no green cones) | #48453B | 0.021 |
| Tritanopia (no blue cones) | #553E3F | 0.013 |
| Achromatopsia (no color) | #444444 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51403B
#51403B
oklch(38.8% 0.025 37)
- #35484D
#35484D
oklch(38.8% 0.025 215.7)
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 #51403B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.036
- Purple Brown #673A3F ΔE 0.045
- Onyx #343A40 ΔE 0.057
- Dark Slate Gray #2F4F4F ΔE 0.064
- Mud Brown #60460F ΔE 0.066
- Charcoal #264653 ΔE 0.070
- Dark Grey Blue #29465B ΔE 0.074
- Brownish Purple #76424E ΔE 0.078
Use #51403B 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.