#403A5B
Closest named color: Dark Grey Blue (#29465B). oklch(36.9% 0.056 291.7), rgb(64, 58, 91).
Aa
White text reads best on this color (10.63:1).
About this color
#403A5B is a dark, muted purple. In OKLCH its lightness is 37%, its chroma 0.056 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.047 away. White text reads best on it, at 10.63:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | muted (0.056) |
| Temperature | in between |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.97:1 |
| White text | 10.63:1 |
Values
| HEX | #403A5B |
| RGB | rgb(64, 58, 91) |
| HSL | hsl(251, 22%, 29%) |
| OKLCH | oklch(36.9% 0.056 291.7) |
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 #403A5B | 10.63:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #403A5B | 1.97:1 | Fails | Lc 9.3 | Not readable |
| #403A5B text on white | 10.63:1 | AAA | Lc 94.6 | Preferred for body text |
| #403A5B text on black | 1.97:1 | Fails | Lc -8.0 | 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
#EAE9F2
oklch(93.7% 0.012 291.3)
-
Step 200
200
#D9D7E8
oklch(88.6% 0.023 291.3)
-
Step 300
300
#C0BCDA
oklch(80.8% 0.042 291.5)
-
Step 400
400
#A199C8
oklch(70.6% 0.068 292.4)
-
Step 500
500
#8A80BA
oklch(63.1% 0.087 291.6)
-
Step 600
600
#7469A6
oklch(55.6% 0.094 291.3)
-
Step 700
700
#62578E
oklch(49.1% 0.087 292.1)
-
Step 800
800
#504773
oklch(42.6% 0.072 292.5)
-
Step 900
900 (this color)
#403A5B
oklch(36.9% 0.056 291.7)
-
Step 950
950
#272337
oklch(27% 0.037 292.9)
#403A5B 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) | #313F5C | 0.026 |
| Deuteranopia (no green cones) | #323E5A | 0.025 |
| Tritanopia (no blue cones) | #3A4046 | 0.048 |
| Achromatopsia (no color) | #3E3E3E | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403A5B
#403A5B
oklch(36.9% 0.056 291.7)
- #40421D
#40421D
oklch(36.8% 0.056 111.6)
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 #403A5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.047
- Onyx #343A40 ΔE 0.053
- Charcoal #264653 ΔE 0.055
- Charcoal Grey #3C4142 ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.057
- Gunmetal #293241 ΔE 0.064
- Space Cadet #2B2D42 ΔE 0.068
Use #403A5B 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.