#403C63
Closest named color: Dark Grey Blue (#29465B). oklch(37.8% 0.066 287.5), rgb(64, 60, 99).
Aa
White text reads best on this color (10.27:1).
About this color
#403C63 is a dark, muted purple. In OKLCH its lightness is 38%, its chroma 0.066 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.048 away. White text reads best on it, at 10.27:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.04:1 |
| White text | 10.27:1 |
Values
| HEX | #403C63 |
| RGB | rgb(64, 60, 99) |
| HSL | hsl(246, 25%, 31%) |
| OKLCH | oklch(37.8% 0.066 287.5) |
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 #403C63 | 10.27:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #403C63 | 2.04:1 | Fails | Lc 10.1 | Not readable |
| #403C63 text on white | 10.27:1 | AAA | Lc 93.8 | Preferred for body text |
| #403C63 text on black | 2.04:1 | Fails | Lc -8.7 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E9E9F3
oklch(93.7% 0.013 286.1)
-
Step 200
200
#D7D7EB
oklch(88.5% 0.027 285.8)
-
Step 300
300
#BEBCE0
oklch(80.9% 0.05 287.8)
-
Step 400
400
#9D99D0
oklch(70.6% 0.08 287.5)
-
Step 500
500
#867FC3
oklch(63% 0.101 287.8)
-
Step 600
600
#7068B0
oklch(55.6% 0.11 287.4)
-
Step 700
700
#5E5697
oklch(49.1% 0.102 287.7)
-
Step 800
800
#4D477A
oklch(42.8% 0.083 287.7)
-
Step 900
900 (this color)
#403C63
oklch(37.8% 0.066 287.5)
-
Step 950
950
#25233A
oklch(27% 0.042 287.2)
#403C63 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) | #304265 | 0.028 |
| Deuteranopia (no green cones) | #304062 | 0.026 |
| Tritanopia (no blue cones) | #37434A | 0.057 |
| Achromatopsia (no color) | #414141 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403C63
#403C63
oklch(37.8% 0.066 287.5)
- #464416
#464416
oklch(37.8% 0.065 106.8)
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 #403C63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.048
- Charcoal #264653 ΔE 0.059
- Prussian Blue #1D3557 ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.064
- Charcoal Grey #3C4142 ΔE 0.065
- Onyx #343A40 ΔE 0.065
- Twilight Blue #0A437A ΔE 0.066
- Dark Slate Blue #483D8B ΔE 0.069
Use #403C63 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.