#403E50
Closest named color: Charcoal Grey (#3C4142). oklch(37.3% 0.031 289.9), rgb(64, 62, 80).
Aa
White text reads best on this color (10.38:1).
About this color
#403E50 is a dark, muted purple. In OKLCH its lightness is 37%, its chroma 0.031 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.030 away. White text reads best on it, at 10.38:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.02:1 |
| White text | 10.38:1 |
Values
| HEX | #403E50 |
| RGB | rgb(64, 62, 80) |
| HSL | hsl(247, 13%, 28%) |
| OKLCH | oklch(37.3% 0.031 289.9) |
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 #403E50 | 10.38:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #403E50 | 2.02:1 | Fails | Lc 9.8 | Not readable |
| #403E50 text on white | 10.38:1 | AAA | Lc 94.1 | Preferred for body text |
| #403E50 text on black | 2.02:1 | Fails | Lc -8.4 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9E9EE
oklch(93.5% 0.007 286.3)
-
Step 200
200
#D9D8E1
oklch(88.6% 0.012 291.3)
-
Step 300
300
#C0BECF
oklch(80.8% 0.024 291.3)
-
Step 400
400
#A09DB7
oklch(70.7% 0.038 290.7)
-
Step 500
500
#8885A5
oklch(63.1% 0.048 289.2)
-
Step 600
600
#726F90
oklch(55.7% 0.051 288.8)
-
Step 700
700
#605C7A
oklch(49% 0.048 290.6)
-
Step 800
800
#4E4C63
oklch(42.8% 0.038 288.7)
-
Step 900
900 (this color)
#403E50
oklch(37.3% 0.031 289.9)
-
Step 950
950
#26252F
oklch(27% 0.018 289.7)
#403E50 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) | #3A4051 | 0.011 |
| Deuteranopia (no green cones) | #3A404F | 0.012 |
| Tritanopia (no blue cones) | #3D4144 | 0.026 |
| Achromatopsia (no color) | #404040 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403E50
#403E50
oklch(37.3% 0.031 289.9)
- #41422F
#41422F
oklch(37.2% 0.031 110.3)
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 #403E50, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.030
- Onyx #343A40 ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.039
- Charcoal #264653 ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.050
- Dark Slate Gray #2F4F4F ΔE 0.058
- Gunmetal #293241 ΔE 0.060
- Prussian Blue #1D3557 ΔE 0.064
Use #403E50 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.