#51404A
Closest named color: Charcoal Grey (#3C4142). oklch(39.3% 0.028 342.4), rgb(81, 64, 74).
Aa
White text reads best on this color (9.62:1).
About this color
#51404A is a dark close to neutral grey. In OKLCH its lightness is 39%, its chroma 0.028. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.040 away. White text reads best on it, at 9.62:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.18:1 |
| White text | 9.62:1 |
Values
| HEX | #51404A |
| RGB | rgb(81, 64, 74) |
| HSL | hsl(325, 12%, 28%) |
| OKLCH | oklch(39.3% 0.028 342.4) |
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 #51404A | 9.62:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #51404A | 2.18:1 | Fails | Lc 11.7 | Not readable |
| #51404A text on white | 9.62:1 | AAA | Lc 92.3 | Preferred for body text |
| #51404A text on black | 2.18:1 | Fails | Lc -10.1 | 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
#EDE8EB
oklch(93.6% 0.007 340.4)
-
Step 200
200
#DFD6DB
oklch(88.5% 0.012 342.7)
-
Step 300
300
#CBBBC4
oklch(80.8% 0.022 342.6)
-
Step 400
400
#B099A6
oklch(70.7% 0.033 342.9)
-
Step 500
500
#9D7F91
oklch(63% 0.045 341.8)
-
Step 600
600
#87697B
oklch(55.6% 0.046 342)
-
Step 700
700
#735768
oklch(49.1% 0.045 341.8)
-
Step 800
800
#5D4754
oklch(42.6% 0.036 342.5)
-
Step 900
900 (this color)
#51404A
oklch(39.3% 0.028 342.4)
-
Step 950
950
#2D2329
oklch(27% 0.018 341.7)
#51404A 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) | #41434A | 0.028 |
| Deuteranopia (no green cones) | #45464A | 0.026 |
| Tritanopia (no blue cones) | #534043 | 0.012 |
| Achromatopsia (no color) | #454545 | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51404A
#51404A
oklch(39.3% 0.028 342.4)
- #384B41
#384B41
oklch(39.3% 0.029 161.7)
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 #51404A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.040
- Purple Brown #673A3F ΔE 0.044
- Onyx #343A40 ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.063
- Dark Slate Gray #2F4F4F ΔE 0.064
- Charcoal #264653 ΔE 0.064
- Brownish Purple #76424E ΔE 0.071
- Dark Blue Grey #1F3B4D ΔE 0.081
Use #51404A 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.