#403D5B
Closest named color: Dark Grey Blue (#29465B). oklch(37.6% 0.051 288.3), rgb(64, 61, 91).
Aa
White text reads best on this color (10.31:1).
About this color
#403D5B is a dark, muted purple. In OKLCH its lightness is 38%, its chroma 0.051 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.041 away. White text reads best on it, at 10.31:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.03:1 |
| White text | 10.31:1 |
Values
| HEX | #403D5B |
| RGB | rgb(64, 61, 91) |
| HSL | hsl(246, 20%, 30%) |
| OKLCH | oklch(37.6% 0.051 288.3) |
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 #403D5B | 10.31:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #403D5B | 2.03:1 | Fails | Lc 10.0 | Not readable |
| #403D5B text on white | 10.31:1 | AAA | Lc 93.9 | Preferred for body text |
| #403D5B text on black | 2.03:1 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E9E9F1
oklch(93.6% 0.011 286.2)
-
Step 200
200
#D8D7E7
oklch(88.5% 0.022 288.8)
-
Step 300
300
#BFBDD8
oklch(80.9% 0.038 288.9)
-
Step 400
400
#9E9BC5
oklch(70.7% 0.061 288)
-
Step 500
500
#8782B6
oklch(63.1% 0.078 288.4)
-
Step 600
600
#716BA2
oklch(55.6% 0.084 288.3)
-
Step 700
700
#5F598B
oklch(49.1% 0.079 288.6)
-
Step 800
800
#4D4971
oklch(42.7% 0.066 287.9)
-
Step 900
900 (this color)
#403D5B
oklch(37.6% 0.051 288.3)
-
Step 950
950
#262435
oklch(27% 0.031 289.5)
#403D5B 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) | #35415C | 0.020 |
| Deuteranopia (no green cones) | #35405A | 0.019 |
| Tritanopia (no blue cones) | #3A4248 | 0.042 |
| Achromatopsia (no color) | #404040 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403D5B
#403D5B
oklch(37.6% 0.051 288.3)
- #444422
#444422
oklch(37.8% 0.052 108.6)
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 #403D5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.041
- Charcoal #264653 ΔE 0.049
- Charcoal Grey #3C4142 ΔE 0.050
- Onyx #343A40 ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.060
- Gunmetal #293241 ΔE 0.067
- Dark Slate Gray #2F4F4F ΔE 0.070
Use #403D5B 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.