#403A4F
Closest named color: Onyx (#343A40). oklch(36.3% 0.036 297.7), rgb(64, 58, 79).
Aa
White text reads best on this color (10.84:1).
About this color
#403A4F is a dark, muted purple. In OKLCH its lightness is 36%, its chroma 0.036 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.035 away. White text reads best on it, at 10.84:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | muted (0.036) |
| Temperature | in between |
| Nearest name | Onyx (#343A40) |
| Black text | 1.93:1 |
| White text | 10.84:1 |
Values
| HEX | #403A4F |
| RGB | rgb(64, 58, 79) |
| HSL | hsl(257, 15%, 27%) |
| OKLCH | oklch(36.3% 0.036 297.7) |
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 #403A4F | 10.84:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #403A4F | 1.93:1 | Fails | Lc 8.8 | Not readable |
| #403A4F text on white | 10.84:1 | AAA | Lc 95.1 | Preferred for body text |
| #403A4F text on black | 1.93:1 | Fails | Lc -7.5 | 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
#F6F5F8
oklch(97.2% 0.004 301.4)
-
Step 100
100
#EAE9EF
oklch(93.7% 0.008 293.9)
-
Step 200
200
#DAD7E2
oklch(88.5% 0.015 298.5)
-
Step 300
300
#C2BDD0
oklch(80.8% 0.027 297.8)
-
Step 400
400
#A39BB9
oklch(70.6% 0.044 297.5)
-
Step 500
500
#8D83A8
oklch(63.2% 0.056 297.2)
-
Step 600
600
#776C93
oklch(55.6% 0.061 297.3)
-
Step 700
700
#645A7D
oklch(49.1% 0.056 297.4)
-
Step 800
800
#524A66
oklch(42.8% 0.047 297.5)
-
Step 900
900 (this color)
#403A4F
oklch(36.3% 0.036 297.7)
-
Step 950
950
#282430
oklch(27% 0.023 300.1)
#403A4F 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) | #363D50 | 0.018 |
| Deuteranopia (no green cones) | #363D4E | 0.019 |
| Tritanopia (no blue cones) | #3D3D41 | 0.030 |
| Achromatopsia (no color) | #3D3D3D | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403A4F
#403A4F
oklch(36.3% 0.036 297.7)
- #3C412B
#3C412B
oklch(36.4% 0.036 118.7)
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 #403A4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.035
- Charcoal Grey #3C4142 ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.049
- Charcoal #264653 ΔE 0.049
- Gunmetal #293241 ΔE 0.053
- Prussian Blue #1D3557 ΔE 0.059
- Space Cadet #2B2D42 ΔE 0.060
Use #403A4F 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.