#403A57
Closest named color: Dark Grey Blue (#29465B). oklch(36.7% 0.05 293.3), rgb(64, 58, 87).
Aa
White text reads best on this color (10.70:1).
About this color
#403A57 is a dark, muted purple. In OKLCH its lightness is 37%, its chroma 0.050 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.046 away. White text reads best on it, at 10.70:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | muted (0.050) |
| Temperature | in between |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.96:1 |
| White text | 10.70:1 |
Values
| HEX | #403A57 |
| RGB | rgb(64, 58, 87) |
| HSL | hsl(252, 20%, 28%) |
| OKLCH | oklch(36.7% 0.05 293.3) |
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 #403A57 | 10.70:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #403A57 | 1.96:1 | Fails | Lc 9.1 | Not readable |
| #403A57 text on white | 10.70:1 | AAA | Lc 94.8 | Preferred for body text |
| #403A57 text on black | 1.96:1 | Fails | Lc -7.8 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#EAE9F1
oklch(93.7% 0.011 291.9)
-
Step 200
200
#D9D7E6
oklch(88.5% 0.021 292.1)
-
Step 300
300
#C1BDD7
oklch(81% 0.036 292.6)
-
Step 400
400
#A29AC3
oklch(70.7% 0.06 293.8)
-
Step 500
500
#8B81B4
oklch(63.1% 0.076 293.1)
-
Step 600
600
#756AA0
oklch(55.6% 0.083 292.8)
-
Step 700
700
#635888
oklch(49.1% 0.076 293.9)
-
Step 800
800
#50486F
oklch(42.6% 0.064 292.9)
-
Step 900
900 (this color)
#403A57
oklch(36.7% 0.05 293.3)
-
Step 950
950
#272435
oklch(27.1% 0.031 292.3)
#403A57 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) | #333E58 | 0.023 |
| Deuteranopia (no green cones) | #333D56 | 0.022 |
| Tritanopia (no blue cones) | #3B3F44 | 0.042 |
| Achromatopsia (no color) | #3E3E3E | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403A57
#403A57
oklch(36.7% 0.05 293.3)
- #3F4222
#3F4222
oklch(36.8% 0.05 113.2)
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 #403A57, 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
- Onyx #343A40 ΔE 0.047
- Charcoal Grey #3C4142 ΔE 0.049
- Charcoal #264653 ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.053
- Prussian Blue #1D3557 ΔE 0.056
- Gunmetal #293241 ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.064
Use #403A57 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.