#403B64
Closest named color: Dark Grey Blue (#29465B). oklch(37.7% 0.069 288.2), rgb(64, 59, 100).
Aa
White text reads best on this color (10.35:1).
About this color
#403B64 is a dark, muted purple. In OKLCH its lightness is 38%, its chroma 0.069 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.051 away. White text reads best on it, at 10.35:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.02:1 |
| White text | 10.35:1 |
Values
| HEX | #403B64 |
| RGB | rgb(64, 59, 100) |
| HSL | hsl(247, 26%, 31%) |
| OKLCH | oklch(37.7% 0.069 288.2) |
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 #403B64 | 10.35:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #403B64 | 2.02:1 | Fails | Lc 9.9 | Not readable |
| #403B64 text on white | 10.35:1 | AAA | Lc 94.0 | Preferred for body text |
| #403B64 text on black | 2.02:1 | Fails | Lc -8.6 | 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
#E9E8F4
oklch(93.5% 0.016 289.9)
-
Step 200
200
#D8D7EC
oklch(88.6% 0.029 288)
-
Step 300
300
#BEBCE1
oklch(80.9% 0.052 287.7)
-
Step 400
400
#9E99D2
oklch(70.8% 0.083 288.1)
-
Step 500
500
#877EC6
oklch(63% 0.107 288.7)
-
Step 600
600
#7167B2
oklch(55.6% 0.114 288.2)
-
Step 700
700
#5F5599
oklch(49.1% 0.107 288.6)
-
Step 800
800
#4D467C
oklch(42.7% 0.088 288)
-
Step 900
900 (this color)
#403B64
oklch(37.7% 0.069 288.2)
-
Step 950
950
#25233B
oklch(27% 0.044 286.9)
#403B64 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) | #2E4166 | 0.030 |
| Deuteranopia (no green cones) | #2E3F63 | 0.029 |
| Tritanopia (no blue cones) | #37434A | 0.060 |
| Achromatopsia (no color) | #404040 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403B64
#403B64
oklch(37.7% 0.069 288.2)
- #454412
#454412
oklch(37.7% 0.069 108.2)
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 #403B64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.061
- Charcoal #264653 ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.065
- Twilight Blue #0A437A ΔE 0.066
- Dark Slate Blue #483D8B ΔE 0.067
- Onyx #343A40 ΔE 0.067
- Charcoal Grey #3C4142 ΔE 0.068
Use #403B64 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.