#404151
Closest named color: Charcoal Grey (#3C4142). oklch(38.1% 0.027 282.2), rgb(64, 65, 81).
Aa
White text reads best on this color (10.03:1).
About this color
#404151 is a dark close to neutral grey. In OKLCH its lightness is 38%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.028 away. White text reads best on it, at 10.03:1.
| Hue family | Neutrals |
| Lightness | dark (38%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.09:1 |
| White text | 10.03:1 |
Values
| HEX | #404151 |
| RGB | rgb(64, 65, 81) |
| HSL | hsl(236, 12%, 28%) |
| OKLCH | oklch(38.1% 0.027 282.2) |
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 #404151 | 10.03:1 | AAA | Lc -97.4 | Preferred for body text |
| Black text on #404151 | 2.09:1 | Fails | Lc 10.6 | Not readable |
| #404151 text on white | 10.03:1 | AAA | Lc 93.3 | Preferred for body text |
| #404151 text on black | 2.09:1 | Fails | Lc -9.2 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9E9EE
oklch(93.5% 0.007 286.3)
-
Step 200
200
#D8D8E1
oklch(88.5% 0.012 286.1)
-
Step 300
300
#BEBFCE
oklch(80.8% 0.021 282.9)
-
Step 400
400
#9D9FB5
oklch(70.8% 0.032 281.4)
-
Step 500
500
#8587A3
oklch(63.2% 0.042 281.9)
-
Step 600
600
#6F708E
oklch(55.5% 0.046 283.3)
-
Step 700
700
#5D5E78
oklch(49.1% 0.041 283)
-
Step 800
800
#4C4D62
oklch(42.8% 0.035 282.7)
-
Step 900
900 (this color)
#404151
oklch(38.1% 0.027 282.2)
-
Step 950
950
#25262F
oklch(27.1% 0.017 280.2)
#404151 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) | #3D4352 | 0.007 |
| Deuteranopia (no green cones) | #3C4251 | 0.007 |
| Tritanopia (no blue cones) | #3C4446 | 0.025 |
| Achromatopsia (no color) | #424242 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404151
#404151
oklch(38.1% 0.027 282.2)
- #454333
#454333
oklch(38% 0.026 101.6)
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 #404151, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.028
- Dark Grey Blue #29465B ΔE 0.035
- Charcoal #264653 ΔE 0.037
- Onyx #343A40 ΔE 0.040
- Dark Slate Gray #2F4F4F ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.053
- Gunmetal #293241 ΔE 0.066
- Dark Teal #014D4E ΔE 0.068
Use #404151 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.