#403E64
Closest named color: Dark Grey Blue (#29465B). oklch(38.3% 0.064 285.4), rgb(64, 62, 100).
Aa
White text reads best on this color (10.04:1).
About this color
#403E64 is a dark, muted purple. In OKLCH its lightness is 38%, its chroma 0.064 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.045 away. White text reads best on it, at 10.04:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.09:1 |
| White text | 10.04:1 |
Values
| HEX | #403E64 |
| RGB | rgb(64, 62, 100) |
| HSL | hsl(243, 23%, 32%) |
| OKLCH | oklch(38.3% 0.064 285.4) |
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 #403E64 | 10.04:1 | AAA | Lc -97.4 | Preferred for body text |
| Black text on #403E64 | 2.09:1 | Fails | Lc 10.7 | Not readable |
| #403E64 text on white | 10.04:1 | AAA | Lc 93.3 | Preferred for body text |
| #403E64 text on black | 2.09:1 | Fails | Lc -9.2 | 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
#BDBDDF
oklch(80.9% 0.048 285.3)
-
Step 400
400
#9B9ACF
oklch(70.6% 0.077 285.1)
-
Step 500
500
#8481C2
oklch(63.2% 0.097 285.4)
-
Step 600
600
#6E69AF
oklch(55.6% 0.107 285.6)
-
Step 700
700
#5C5796
oklch(49% 0.099 285.7)
-
Step 800
800
#4B487A
oklch(42.8% 0.082 285.1)
-
Step 900
900 (this color)
#403E64
oklch(38.3% 0.064 285.4)
-
Step 950
950
#242339
oklch(26.8% 0.041 285.4)
#403E64 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) | #324366 | 0.024 |
| Deuteranopia (no green cones) | #314163 | 0.024 |
| Tritanopia (no blue cones) | #37454C | 0.055 |
| Achromatopsia (no color) | #424242 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403E64
#403E64
oklch(38.3% 0.064 285.4)
- #484518
#484518
oklch(38.3% 0.064 105.5)
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 #403E64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.045
- Charcoal #264653 ΔE 0.057
- Charcoal Grey #3C4142 ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.064
- Twilight Blue #0A437A ΔE 0.065
- Dark Blue Grey #1F3B4D ΔE 0.065
- Onyx #343A40 ΔE 0.066
- Dark Slate Blue #483D8B ΔE 0.068
Use #403E64 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.