#403C4B
Closest named color: Charcoal Grey (#3C4142). oklch(36.6% 0.026 297.3), rgb(64, 60, 75).
Aa
White text reads best on this color (10.68:1).
About this color
#403C4B is a dark close to neutral grey. In OKLCH its lightness is 37%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.027 away. White text reads best on it, at 10.68:1.
| Hue family | Neutrals |
| Lightness | dark (37%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.96:1 |
| White text | 10.68:1 |
Values
| HEX | #403C4B |
| RGB | rgb(64, 60, 75) |
| HSL | hsl(256, 11%, 26%) |
| OKLCH | oklch(36.6% 0.026 297.3) |
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 #403C4B | 10.68:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #403C4B | 1.96:1 | Fails | Lc 9.1 | Not readable |
| #403C4B text on white | 10.68:1 | AAA | Lc 94.8 | Preferred for body text |
| #403C4B text on black | 1.96:1 | Fails | Lc -7.8 | 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
#EAE9ED
oklch(93.6% 0.005 297.7)
-
Step 200
200
#DAD8E0
oklch(88.6% 0.011 297.6)
-
Step 300
300
#C2BECC
oklch(80.9% 0.02 299)
-
Step 400
400
#A29DB2
oklch(70.7% 0.031 296.5)
-
Step 500
500
#8C859F
oklch(63.2% 0.039 297.6)
-
Step 600
600
#766E8A
oklch(55.6% 0.044 298)
-
Step 700
700
#635C75
oklch(49.1% 0.04 297.7)
-
Step 800
800
#514B5F
oklch(42.6% 0.033 298.7)
-
Step 900
900 (this color)
#403C4B
oklch(36.6% 0.026 297.3)
-
Step 950
950
#27252E
oklch(27% 0.017 295.4)
#403C4B 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) | #393E4C | 0.012 |
| Deuteranopia (no green cones) | #3A3E4B | 0.011 |
| Tritanopia (no blue cones) | #3E3E41 | 0.021 |
| Achromatopsia (no color) | #3E3E3E | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403C4B
#403C4B
oklch(36.6% 0.026 297.3)
- #3D4131
#3D4131
oklch(36.6% 0.027 119.1)
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 #403C4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.027
- Onyx #343A40 ΔE 0.029
- Charcoal #264653 ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.044
- Dark Blue Grey #1F3B4D ΔE 0.048
- Gunmetal #293241 ΔE 0.054
- Dark Slate Gray #2F4F4F ΔE 0.062
- Space Cadet #2B2D42 ΔE 0.063
Use #403C4B 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.