#403C4A
Closest named color: Charcoal Grey (#3C4142). oklch(36.6% 0.024 298.3), rgb(64, 60, 74).
Aa
White text reads best on this color (10.69:1).
About this color
#403C4A is a dark close to neutral grey. In OKLCH its lightness is 37%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.025 away. White text reads best on it, at 10.69:1.
| Hue family | Neutrals |
| Lightness | dark (37%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.96:1 |
| White text | 10.69:1 |
Values
| HEX | #403C4A |
| RGB | rgb(64, 60, 74) |
| HSL | hsl(257, 10%, 26%) |
| OKLCH | oklch(36.6% 0.024 298.3) |
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 #403C4A | 10.69:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #403C4A | 1.96:1 | Fails | Lc 9.1 | Not readable |
| #403C4A text on white | 10.69:1 | AAA | Lc 94.8 | Preferred for body text |
| #403C4A 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
#DAD8DF
oklch(88.6% 0.01 299.2)
-
Step 300
300
#C2BECB
oklch(80.9% 0.019 300)
-
Step 400
400
#A29DB1
oklch(70.7% 0.029 297.1)
-
Step 500
500
#8C859E
oklch(63.1% 0.038 298.1)
-
Step 600
600
#766E88
oklch(55.5% 0.041 299.1)
-
Step 700
700
#635C74
oklch(49% 0.039 298.3)
-
Step 800
800
#514B5E
oklch(42.6% 0.032 299.5)
-
Step 900
900 (this color)
#403C4A
oklch(36.6% 0.024 298.3)
-
Step 950
950
#27252D
oklch(27% 0.015 296.8)
#403C4A 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) | #393E4B | 0.012 |
| Deuteranopia (no green cones) | #3A3E4A | 0.011 |
| Tritanopia (no blue cones) | #3E3E41 | 0.019 |
| Achromatopsia (no color) | #3E3E3E | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403C4A
#403C4A
oklch(36.6% 0.024 298.3)
- #3D4132
#3D4132
oklch(36.7% 0.025 119.8)
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 #403C4A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.025
- Onyx #343A40 ΔE 0.028
- Charcoal #264653 ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.045
- 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 #403C4A 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.