#403B4A
Closest named color: Onyx (#343A40). oklch(36.3% 0.026 300.3), rgb(64, 59, 74).
Aa
White text reads best on this color (10.81:1).
About this color
#403B4A is a dark close to neutral grey. In OKLCH its lightness is 36%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.028 away. White text reads best on it, at 10.81:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.94:1 |
| White text | 10.81:1 |
Values
| HEX | #403B4A |
| RGB | rgb(64, 59, 74) |
| HSL | hsl(260, 11%, 26%) |
| OKLCH | oklch(36.3% 0.026 300.3) |
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 #403B4A | 10.81:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #403B4A | 1.94:1 | Fails | Lc 8.8 | Not readable |
| #403B4A text on white | 10.81:1 | AAA | Lc 95.1 | Preferred for body text |
| #403B4A text on black | 1.94:1 | Fails | Lc -7.6 | 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
#F6F5F7
oklch(97.1% 0.003 308.4)
-
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
#C2BECC
oklch(80.9% 0.02 299)
-
Step 400
400
#A39CB2
oklch(70.6% 0.033 300.1)
-
Step 500
500
#8D849F
oklch(63.1% 0.041 300.4)
-
Step 600
600
#776E8A
oklch(55.7% 0.044 299.7)
-
Step 700
700
#645C75
oklch(49.2% 0.041 299.5)
-
Step 800
800
#524B5F
oklch(42.7% 0.034 301)
-
Step 900
900 (this color)
#403B4A
oklch(36.3% 0.026 300.3)
-
Step 950
950
#28252D
oklch(27.1% 0.015 302.4)
#403B4A 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) | #383D4B | 0.014 |
| Deuteranopia (no green cones) | #393D4A | 0.013 |
| Tritanopia (no blue cones) | #3E3D40 | 0.021 |
| Achromatopsia (no color) | #3D3D3D | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403B4A
#403B4A
oklch(36.3% 0.026 300.3)
- #3C4031
#3C4031
oklch(36.3% 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 #403B4A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.028
- Charcoal Grey #3C4142 ΔE 0.028
- Charcoal #264653 ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.048
- Gunmetal #293241 ΔE 0.052
- Space Cadet #2B2D42 ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.063
Use #403B4A 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.