#403B5A
Closest named color: Dark Grey Blue (#29465B). oklch(37.1% 0.053 291), rgb(64, 59, 90).
Aa
White text reads best on this color (10.54:1).
About this color
#403B5A is a dark, muted purple. In OKLCH its lightness is 37%, its chroma 0.053 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.044 away. White text reads best on it, at 10.54:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | muted (0.053) |
| Temperature | in between |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.99:1 |
| White text | 10.54:1 |
Values
| HEX | #403B5A |
| RGB | rgb(64, 59, 90) |
| HSL | hsl(250, 21%, 29%) |
| OKLCH | oklch(37.1% 0.053 291) |
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 #403B5A | 10.54:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #403B5A | 1.99:1 | Fails | Lc 9.5 | Not readable |
| #403B5A text on white | 10.54:1 | AAA | Lc 94.4 | Preferred for body text |
| #403B5A text on black | 1.99:1 | Fails | Lc -8.1 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#EAE9F1
oklch(93.7% 0.011 291.9)
-
Step 200
200
#D9D7E7
oklch(88.6% 0.022 291.7)
-
Step 300
300
#C0BDD9
oklch(81% 0.039 290.4)
-
Step 400
400
#A09AC6
oklch(70.7% 0.064 290.9)
-
Step 500
500
#8981B7
oklch(63.1% 0.081 290.7)
-
Step 600
600
#736AA3
oklch(55.6% 0.088 290.5)
-
Step 700
700
#61588C
oklch(49.1% 0.082 291)
-
Step 800
800
#4F4871
oklch(42.7% 0.067 291.1)
-
Step 900
900 (this color)
#403B5A
oklch(37.1% 0.053 291)
-
Step 950
950
#262436
oklch(27.1% 0.033 289.1)
#403B5A 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) | #333F5B | 0.022 |
| Deuteranopia (no green cones) | #333E59 | 0.022 |
| Tritanopia (no blue cones) | #3A4046 | 0.044 |
| Achromatopsia (no color) | #3F3F3F | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403B5A
#403B5A
oklch(37.1% 0.053 291)
- #414320
#414320
oklch(37.2% 0.054 111.6)
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 #403B5A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.044
- Onyx #343A40 ΔE 0.051
- Charcoal Grey #3C4142 ΔE 0.052
- Charcoal #264653 ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.058
- Gunmetal #293241 ΔE 0.064
- Space Cadet #2B2D42 ΔE 0.068
Use #403B5A 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.