#403D58
Closest named color: Dark Grey Blue (#29465B). oklch(37.5% 0.046 289.1), rgb(64, 61, 88).
Aa
White text reads best on this color (10.36:1).
About this color
#403D58 is a dark, muted purple. In OKLCH its lightness is 37%, its chroma 0.046 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.040 away. White text reads best on it, at 10.36:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.02:1 |
| White text | 10.36:1 |
Values
| HEX | #403D58 |
| RGB | rgb(64, 61, 88) |
| HSL | hsl(247, 18%, 29%) |
| OKLCH | oklch(37.5% 0.046 289.1) |
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 #403D58 | 10.36:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #403D58 | 2.02:1 | Fails | Lc 9.9 | Not readable |
| #403D58 text on white | 10.36:1 | AAA | Lc 94.0 | Preferred for body text |
| #403D58 text on black | 2.02:1 | Fails | Lc -8.5 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E9E9F0
oklch(93.6% 0.009 286.2)
-
Step 200
200
#D8D7E5
oklch(88.4% 0.019 289.3)
-
Step 300
300
#BFBDD6
oklch(80.8% 0.035 289.3)
-
Step 400
400
#9F9BC1
oklch(70.6% 0.055 289.7)
-
Step 500
500
#8883B2
oklch(63.2% 0.07 289.1)
-
Step 600
600
#726C9E
oklch(55.7% 0.077 289.1)
-
Step 700
700
#5F5A87
oklch(49.1% 0.071 288.6)
-
Step 800
800
#4E4A6D
oklch(42.8% 0.057 289)
-
Step 900
900 (this color)
#403D58
oklch(37.5% 0.046 289.1)
-
Step 950
950
#262434
oklch(27% 0.03 290)
#403D58 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) | #364159 | 0.019 |
| Deuteranopia (no green cones) | #363F57 | 0.017 |
| Tritanopia (no blue cones) | #3B4247 | 0.039 |
| Achromatopsia (no color) | #404040 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403D58
#403D58
oklch(37.5% 0.046 289.1)
- #434326
#434326
oklch(37.5% 0.045 108.4)
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 #403D58, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.045
- Charcoal #264653 ΔE 0.047
- Onyx #343A40 ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.053
- Prussian Blue #1D3557 ΔE 0.060
- Gunmetal #293241 ΔE 0.064
- Dark Slate Gray #2F4F4F ΔE 0.067
Use #403D58 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.