#51424C
Closest named color: Charcoal Grey (#3C4142). oklch(39.8% 0.026 338.5), rgb(81, 66, 76).
Aa
White text reads best on this color (9.40:1).
About this color
#51424C is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.041 away. White text reads best on it, at 9.40:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.23:1 |
| White text | 9.40:1 |
Values
| HEX | #51424C |
| RGB | rgb(81, 66, 76) |
| HSL | hsl(320, 10%, 29%) |
| OKLCH | oklch(39.8% 0.026 338.5) |
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 #51424C | 9.40:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #51424C | 2.23:1 | Fails | Lc 12.2 | Not readable |
| #51424C text on white | 9.40:1 | AAA | Lc 91.7 | Preferred for body text |
| #51424C text on black | 2.23:1 | Fails | Lc -10.6 | 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
#F7F5F6
oklch(97.2% 0.002 345.2)
-
Step 100
100
#ECE8EB
oklch(93.5% 0.006 334)
-
Step 200
200
#DED6DB
oklch(88.4% 0.011 339.4)
-
Step 300
300
#CABCC5
oklch(80.9% 0.02 338.8)
-
Step 400
400
#AE99A7
oklch(70.6% 0.031 338.1)
-
Step 500
500
#9A8092
oklch(63% 0.041 337.4)
-
Step 600
600
#856A7C
oklch(55.7% 0.043 338.8)
-
Step 700
700
#705869
oklch(49.1% 0.04 337)
-
Step 800
800
#5C4855
oklch(42.7% 0.034 339.6)
-
Step 900
900 (this color)
#51424C
oklch(39.8% 0.026 338.5)
-
Step 950
950
#2C2329
oklch(26.9% 0.017 338.5)
#51424C 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) | #42454C | 0.026 |
| Deuteranopia (no green cones) | #46474C | 0.023 |
| Tritanopia (no blue cones) | #534245 | 0.012 |
| Achromatopsia (no color) | #464646 | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51424C
#51424C
oklch(39.8% 0.026 338.5)
- #3C4C42
#3C4C42
oklch(39.9% 0.026 157.6)
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 #51424C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.041
- Purple Brown #673A3F ΔE 0.046
- Dark Slate Gray #2F4F4F ΔE 0.061
- Onyx #343A40 ΔE 0.061
- Dark Grey Blue #29465B ΔE 0.062
- Charcoal #264653 ΔE 0.063
- Brownish Purple #76424E ΔE 0.070
- Dusty Grape #545775 ΔE 0.080
Use #51424C 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.