#51454B
Closest named color: Charcoal Grey (#3C4142). oklch(40.5% 0.019 346.3), rgb(81, 69, 75).
Aa
White text reads best on this color (9.11:1).
About this color
#51454B is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.019. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.042 away. White text reads best on it, at 9.11:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.30:1 |
| White text | 9.11:1 |
Values
| HEX | #51454B |
| RGB | rgb(81, 69, 75) |
| HSL | hsl(330, 8%, 29%) |
| OKLCH | oklch(40.5% 0.019 346.3) |
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 #51454B | 9.11:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #51454B | 2.30:1 | Fails | Lc 13.0 | Not readable |
| #51454B text on white | 9.11:1 | AAA | Lc 91.0 | Preferred for body text |
| #51454B text on black | 2.30:1 | Fails | Lc -11.3 | 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
#F6F5F5
oklch(97.1% 0.001 17.2)
-
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
#C6BEC2
oklch(80.9% 0.01 345.5)
-
Step 400
400
#A99CA3
oklch(70.6% 0.018 343.8)
-
Step 500
500
#94848C
oklch(63% 0.022 346.1)
-
Step 600
600
#7F6E76
oklch(55.7% 0.024 347.8)
-
Step 700
700
#6B5C63
oklch(49.2% 0.022 348.1)
-
Step 800
800 (this color)
#51454B
oklch(40.5% 0.019 346.3)
-
Step 900
900
#483F43
oklch(37.8% 0.014 349.1)
-
Step 950
950
#2A2527
oklch(27.1% 0.008 351.5)
#51454B 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) | #46474B | 0.019 |
| Deuteranopia (no green cones) | #48494B | 0.019 |
| Tritanopia (no blue cones) | #534547 | 0.007 |
| Achromatopsia (no color) | #484848 | 0.019 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51454B
#51454B
oklch(40.5% 0.019 346.3)
- #404C47
#404C47
oklch(40.4% 0.017 168.4)
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 #51454B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.042
- Purple Brown #673A3F ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.063
- Charcoal #264653 ΔE 0.063
- Onyx #343A40 ΔE 0.064
- Brownish Purple #76424E ΔE 0.069
- Dusty Grape #545775 ΔE 0.076
Use #51454B 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.