#403E58
Closest named color: Dark Grey Blue (#29465B). oklch(37.7% 0.044 287.6), rgb(64, 62, 88).
Aa
White text reads best on this color (10.25:1).
About this color
#403E58 is a dark, muted purple. In OKLCH its lightness is 38%, its chroma 0.044 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.038 away. White text reads best on it, at 10.25:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.04:1 |
| White text | 10.25:1 |
Values
| HEX | #403E58 |
| RGB | rgb(64, 62, 88) |
| HSL | hsl(245, 17%, 29%) |
| OKLCH | oklch(37.7% 0.044 287.6) |
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 #403E58 | 10.25:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #403E58 | 2.04:1 | Fails | Lc 10.1 | Not readable |
| #403E58 text on white | 10.25:1 | AAA | Lc 93.8 | Preferred for body text |
| #403E58 text on black | 2.04:1 | Fails | Lc -8.7 | 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
#BFBED5
oklch(81% 0.032 287.7)
-
Step 400
400
#9E9CC0
oklch(70.7% 0.052 287.5)
-
Step 500
500
#8783B1
oklch(63.1% 0.069 288.2)
-
Step 600
600
#716D9C
oklch(55.7% 0.072 287.7)
-
Step 700
700
#5E5B86
oklch(49.2% 0.068 286.8)
-
Step 800
800
#4D4A6D
oklch(42.7% 0.058 287.6)
-
Step 900
900 (this color)
#403E58
oklch(37.7% 0.044 287.6)
-
Step 950
950
#252434
oklch(26.9% 0.03 287.1)
#403E58 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) | #374159 | 0.016 |
| Deuteranopia (no green cones) | #374057 | 0.015 |
| Tritanopia (no blue cones) | #3B4247 | 0.037 |
| Achromatopsia (no color) | #414141 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403E58
#403E58
oklch(37.7% 0.044 287.6)
- #444327
#444327
oklch(37.6% 0.044 106.6)
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 #403E58, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.038
- Charcoal Grey #3C4142 ΔE 0.043
- Charcoal #264653 ΔE 0.045
- Onyx #343A40 ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.062
- Dark Slate Gray #2F4F4F ΔE 0.064
- Gunmetal #293241 ΔE 0.066
Use #403E58 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.