#403B5E
Closest named color: Dark Grey Blue (#29465B). oklch(37.3% 0.059 289.8), rgb(64, 59, 94).
Aa
White text reads best on this color (10.47:1).
About this color
#403B5E is a dark, muted purple. In OKLCH its lightness is 37%, its chroma 0.059 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.046 away. White text reads best on it, at 10.47:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.00:1 |
| White text | 10.47:1 |
Values
| HEX | #403B5E |
| RGB | rgb(64, 59, 94) |
| HSL | hsl(249, 23%, 30%) |
| OKLCH | oklch(37.3% 0.059 289.8) |
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 #403B5E | 10.47:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #403B5E | 2.00:1 | Fails | Lc 9.7 | Not readable |
| #403B5E text on white | 10.47:1 | AAA | Lc 94.3 | Preferred for body text |
| #403B5E text on black | 2.00:1 | Fails | Lc -8.3 | 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
#E9E9F2
oklch(93.7% 0.012 286.2)
-
Step 200
200
#D8D7E9
oklch(88.5% 0.025 288.4)
-
Step 300
300
#BFBCDC
oklch(80.8% 0.045 289.7)
-
Step 400
400
#9F9ACB
oklch(70.8% 0.071 289.1)
-
Step 500
500
#8880BD
oklch(63.1% 0.091 289.5)
-
Step 600
600
#7269A9
oklch(55.6% 0.098 289.3)
-
Step 700
700
#605791
oklch(49.1% 0.092 289.7)
-
Step 800
800
#4E4776
oklch(42.6% 0.077 289.6)
-
Step 900
900 (this color)
#403B5E
oklch(37.3% 0.059 289.8)
-
Step 950
950
#262338
oklch(27% 0.039 290.1)
#403B5E 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) | #31405F | 0.026 |
| Deuteranopia (no green cones) | #313F5D | 0.025 |
| Tritanopia (no blue cones) | #394148 | 0.049 |
| Achromatopsia (no color) | #3F3F3F | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403B5E
#403B5E
oklch(37.3% 0.059 289.8)
- #43431B
#43431B
oklch(37.3% 0.059 109)
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 #403B5E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.046
- Charcoal #264653 ΔE 0.056
- Onyx #343A40 ΔE 0.058
- Charcoal Grey #3C4142 ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.059
- Gunmetal #293241 ΔE 0.068
- Twilight Blue #0A437A ΔE 0.071
Use #403B5E 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.