#402B78
Closest named color: Dark Slate Blue (#483D8B). oklch(35.9% 0.125 291.4), rgb(64, 43, 120).
Aa
White text reads best on this color (11.44:1).
About this color
#402B78 is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.125 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.056 away. White text reads best on it, at 11.44:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.125) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.83:1 |
| White text | 11.44:1 |
Values
| HEX | #402B78 |
| RGB | rgb(64, 43, 120) |
| HSL | hsl(256, 47%, 32%) |
| OKLCH | oklch(35.9% 0.125 291.4) |
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 #402B78 | 11.44:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #402B78 | 1.83:1 | Fails | Lc 7.9 | Not readable |
| #402B78 text on white | 11.44:1 | AAA | Lc 96.0 | Preferred for body text |
| #402B78 text on black | 1.83:1 | Fails | Lc 0.0 | 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
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#E9E7FB
oklch(93.5% 0.027 290.5)
-
Step 200
200
#D9D4FA
oklch(88.6% 0.052 291.3)
-
Step 300
300
#C1B6F9
oklch(80.9% 0.094 291.7)
-
Step 400
400
#A28DF6
oklch(70.6% 0.151 291.2)
-
Step 500
500
#8E6DF2
oklch(63.2% 0.191 291.4)
-
Step 600
600
#7A50E1
oklch(55.7% 0.209 291.4)
-
Step 700
700
#673FC3
oklch(49.1% 0.194 291.5)
-
Step 800
800
#54359E
oklch(42.7% 0.161 291.7)
-
Step 900
900 (this color)
#402B78
oklch(35.9% 0.125 291.4)
-
Step 950
950
#281D49
oklch(27% 0.079 291.8)
#402B78 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) | #003B7A | 0.076 |
| Deuteranopia (no green cones) | #003876 | 0.075 |
| Tritanopia (no blue cones) | #2F3D4D | 0.102 |
| Achromatopsia (no color) | #3A3A3A | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #402B78
#402B78
oklch(35.9% 0.125 291.4)
- #3F4000
#3F4000
oklch(35.9% 0.079 110.8)
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 #402B78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.056
- Indigo #4B0082 ΔE 0.064
- Royal Purple #4B006E ΔE 0.071
- Blueberry #464196 ΔE 0.073
- Marine Blue #01386A ΔE 0.082
- Twilight Blue #0A437A ΔE 0.082
- Prussian Blue #1D3557 ΔE 0.085
- Midnight Blue #191970 ΔE 0.085
Use #402B78 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.