#51434F
Closest named color: Charcoal Grey (#3C4142). oklch(40.2% 0.027 330.8), rgb(81, 67, 79).
Aa
White text reads best on this color (9.26:1).
About this color
#51434F is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.044 away. White text reads best on it, at 9.26:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.26:1 |
| White text | 9.26:1 |
Values
| HEX | #51434F |
| RGB | rgb(81, 67, 79) |
| HSL | hsl(309, 9%, 29%) |
| OKLCH | oklch(40.2% 0.027 330.8) |
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 #51434F | 9.26:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #51434F | 2.26:1 | Fails | Lc 12.6 | Not readable |
| #51434F text on white | 9.26:1 | AAA | Lc 91.4 | Preferred for body text |
| #51434F text on black | 2.26:1 | Fails | Lc -11.0 | 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
#F6F5F6
oklch(97.1% 0.002 325.6)
-
Step 100
100
#ECE8EC
oklch(93.5% 0.007 325.6)
-
Step 200
200
#DED6DD
oklch(88.4% 0.013 329.6)
-
Step 300
300
#C9BCC7
oklch(80.9% 0.021 330.7)
-
Step 400
400
#AD9AAA
oklch(70.8% 0.032 331.1)
-
Step 500
500
#998195
oklch(63.2% 0.041 331.7)
-
Step 600
600
#836A80
oklch(55.6% 0.045 330.2)
-
Step 700
700
#6F586C
oklch(49.1% 0.043 330.6)
-
Step 800
800
#5A4858
oklch(42.6% 0.035 329.9)
-
Step 900
900 (this color)
#51434F
oklch(40.2% 0.027 330.8)
-
Step 950
950
#2C232A
oklch(26.9% 0.018 333.9)
#51434F 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) | #434650 | 0.024 |
| Deuteranopia (no green cones) | #46484F | 0.023 |
| Tritanopia (no blue cones) | #524447 | 0.015 |
| Achromatopsia (no color) | #474747 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51434F
#51434F
oklch(40.2% 0.027 330.8)
- #3E4D41
#3E4D41
oklch(40.3% 0.028 150.9)
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 #51434F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.044
- Purple Brown #673A3F ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.060
- Dark Grey Blue #29465B ΔE 0.061
- Charcoal #264653 ΔE 0.063
- Onyx #343A40 ΔE 0.063
- Brownish Purple #76424E ΔE 0.069
- Dusty Grape #545775 ΔE 0.075
Use #51434F 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.