#403C64
Closest named color: Dark Grey Blue (#29465B). oklch(37.9% 0.067 287.3), rgb(64, 60, 100).
Aa
White text reads best on this color (10.25:1).
About this color
#403C64 is a dark, muted purple. In OKLCH its lightness is 38%, its chroma 0.067 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.049 away. White text reads best on it, at 10.25:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.04:1 |
| White text | 10.25:1 |
Values
| HEX | #403C64 |
| RGB | rgb(64, 60, 100) |
| HSL | hsl(246, 25%, 31%) |
| OKLCH | oklch(37.9% 0.067 287.3) |
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 #403C64 | 10.25:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #403C64 | 2.04:1 | Fails | Lc 10.2 | Not readable |
| #403C64 text on white | 10.25:1 | AAA | Lc 93.7 | Preferred for body text |
| #403C64 text on black | 2.04:1 | Fails | Lc -8.8 | 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
#9D99D1
oklch(70.7% 0.081 287.4)
-
Step 500
500
#867FC5
oklch(63.1% 0.104 287.6)
-
Step 600
600
#7068B1
oklch(55.7% 0.111 287.2)
-
Step 700
700
#5E5698
oklch(49.1% 0.104 287.5)
-
Step 800
800
#4C467C
oklch(42.6% 0.088 287.1)
-
Step 900
900 (this color)
#403C64
oklch(37.9% 0.067 287.3)
-
Step 950
950
#25233A
oklch(27% 0.042 287.2)
#403C64 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) | #304266 | 0.028 |
| Deuteranopia (no green cones) | #2F4063 | 0.027 |
| Tritanopia (no blue cones) | #37434B | 0.056 |
| Achromatopsia (no color) | #414141 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403C64
#403C64
oklch(37.9% 0.067 287.3)
- #464414
#464414
oklch(37.8% 0.067 106.9)
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 #403C64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.049
- Charcoal #264653 ΔE 0.060
- Prussian Blue #1D3557 ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.065
- Twilight Blue #0A437A ΔE 0.065
- Charcoal Grey #3C4142 ΔE 0.067
- Onyx #343A40 ΔE 0.067
- Dark Slate Blue #483D8B ΔE 0.067
Use #403C64 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.