#403B4E
Closest named color: Onyx (#343A40). oklch(36.5% 0.033 296.8), rgb(64, 59, 78).
Aa
White text reads best on this color (10.74:1).
About this color
#403B4E is a dark, muted purple. In OKLCH its lightness is 37%, its chroma 0.033 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.033 away. White text reads best on it, at 10.74:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | muted (0.033) |
| Temperature | in between |
| Nearest name | Onyx (#343A40) |
| Black text | 1.95:1 |
| White text | 10.74:1 |
Values
| HEX | #403B4E |
| RGB | rgb(64, 59, 78) |
| HSL | hsl(256, 14%, 27%) |
| OKLCH | oklch(36.5% 0.033 296.8) |
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 #403B4E | 10.74:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #403B4E | 1.95:1 | Fails | Lc 9.0 | Not readable |
| #403B4E text on white | 10.74:1 | AAA | Lc 94.9 | Preferred for body text |
| #403B4E text on black | 1.95:1 | Fails | Lc -7.7 | 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
#EAE9EE
oklch(93.6% 0.007 295.4)
-
Step 200
200
#DAD7E1
oklch(88.4% 0.014 299.8)
-
Step 300
300
#C2BECF
oklch(81% 0.024 296.6)
-
Step 400
400
#A39CB7
oklch(70.8% 0.04 297.2)
-
Step 500
500
#8C83A5
oklch(63% 0.051 297)
-
Step 600
600
#766D90
oklch(55.6% 0.054 296.4)
-
Step 700
700
#635B7B
oklch(49.1% 0.051 295.9)
-
Step 800
800
#514A64
oklch(42.6% 0.043 296.9)
-
Step 900
900 (this color)
#403B4E
oklch(36.5% 0.033 296.8)
-
Step 950
950
#272430
oklch(26.9% 0.022 296.3)
#403B4E 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) | #373E4F | 0.016 |
| Deuteranopia (no green cones) | #383D4D | 0.015 |
| Tritanopia (no blue cones) | #3D3E41 | 0.028 |
| Achromatopsia (no color) | #3E3E3E | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403B4E
#403B4E
oklch(36.5% 0.033 296.8)
- #3D412D
#3D412D
oklch(36.5% 0.033 117.3)
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 #403B4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.033
- Charcoal Grey #3C4142 ΔE 0.034
- Dark Grey Blue #29465B ΔE 0.045
- Charcoal #264653 ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.048
- Gunmetal #293241 ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.061
Use #403B4E 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.