#51454D
Closest named color: Charcoal Grey (#3C4142). oklch(40.5% 0.021 338.3), rgb(81, 69, 77).
Aa
White text reads best on this color (9.09:1).
About this color
#51454D is a dark close to neutral grey. In OKLCH its lightness is 41%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.043 away. White text reads best on it, at 9.09:1.
| Hue family | Neutrals |
| Lightness | dark (41%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.30:1 |
| White text | 9.09:1 |
Values
| HEX | #51454D |
| RGB | rgb(81, 69, 77) |
| HSL | hsl(320, 8%, 29%) |
| OKLCH | oklch(40.5% 0.021 338.3) |
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 #51454D | 9.09:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #51454D | 2.30:1 | Fails | Lc 13.0 | Not readable |
| #51454D text on white | 9.09:1 | AAA | Lc 90.9 | Preferred for body text |
| #51454D text on black | 2.30:1 | Fails | Lc -11.4 | 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 800.
-
Step 50
50
#F6F5F6
oklch(97.1% 0.002 325.6)
-
Step 100
100
#EBE9EA
oklch(93.6% 0.003 345.2)
-
Step 200
200
#DCD7DA
oklch(88.4% 0.007 340.4)
-
Step 300
300
#C6BEC3
oklch(81% 0.011 339.4)
-
Step 400
400
#A99CA5
oklch(70.7% 0.02 336.7)
-
Step 500
500
#94848F
oklch(63.1% 0.025 337.1)
-
Step 600
600
#7E6D79
oklch(55.5% 0.028 336.5)
-
Step 700
700
#6B5B66
oklch(49.1% 0.027 337.4)
-
Step 800
800 (this color)
#51454D
oklch(40.5% 0.021 338.3)
-
Step 900
900
#483E44
oklch(37.6% 0.017 341.2)
-
Step 950
950
#2A2528
oklch(27.1% 0.009 341)
#51454D 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) | #45474D | 0.021 |
| Deuteranopia (no green cones) | #48494D | 0.019 |
| Tritanopia (no blue cones) | #534548 | 0.009 |
| Achromatopsia (no color) | #484848 | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51454D
#51454D
oklch(40.5% 0.021 338.3)
- #404D45
#404D45
oklch(40.6% 0.021 158.3)
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 #51454D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.043
- Purple Brown #673A3F ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.062
- Charcoal #264653 ΔE 0.063
- Onyx #343A40 ΔE 0.065
- Brownish Purple #76424E ΔE 0.069
- Dusty Grape #545775 ΔE 0.074
Use #51454D 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.