#51403A
Closest named color: Charcoal Grey (#3C4142). oklch(38.8% 0.026 40.4), rgb(81, 64, 58).
Aa
White text reads best on this color (9.79:1).
About this color
#51403A is a dark close to neutral grey. In OKLCH its lightness is 39%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.037 away. White text reads best on it, at 9.79:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.14:1 |
| White text | 9.79:1 |
Values
| HEX | #51403A |
| RGB | rgb(81, 64, 58) |
| HSL | hsl(16, 17%, 27%) |
| OKLCH | oklch(38.8% 0.026 40.4) |
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 #51403A | 9.79:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #51403A | 2.14:1 | Fails | Lc 11.2 | Not readable |
| #51403A text on white | 9.79:1 | AAA | Lc 92.7 | Preferred for body text |
| #51403A text on black | 2.14:1 | Fails | Lc -9.7 | 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
#CCBDB7
oklch(80.9% 0.019 43.2)
-
Step 400
400
#B39B92
oklch(70.8% 0.031 41.7)
-
Step 500
500
#9F8277
oklch(63.1% 0.039 41.8)
-
Step 600
600
#8A6B60
oklch(55.5% 0.043 40.4)
-
Step 700
700
#755950
oklch(49% 0.04 38.6)
-
Step 800
800
#5F4941
oklch(42.6% 0.033 40.9)
-
Step 900
900 (this color)
#51403A
oklch(38.8% 0.026 40.4)
-
Step 950
950
#2E2420
oklch(27.1% 0.017 42.9)
#51403A 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) | #44423A | 0.023 |
| Deuteranopia (no green cones) | #48453A | 0.021 |
| Tritanopia (no blue cones) | #553E3E | 0.013 |
| Achromatopsia (no color) | #444444 | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51403A
#51403A
oklch(38.8% 0.026 40.4)
- #35484E
#35484E
oklch(38.8% 0.026 219.2)
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 #51403A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.037
- Purple Brown #673A3F ΔE 0.046
- Onyx #343A40 ΔE 0.057
- Dark Slate Gray #2F4F4F ΔE 0.064
- Mud Brown #60460F ΔE 0.065
- Charcoal #264653 ΔE 0.071
- Dark Grey Blue #29465B ΔE 0.075
- Brownish Purple #76424E ΔE 0.079
Use #51403A 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.