#402A7B
Closest named color: Dark Slate Blue (#483D8B). oklch(36% 0.131 290.9), rgb(64, 42, 123).
Aa
White text reads best on this color (11.44:1).
About this color
#402A7B is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.131 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 0.055 away. White text reads best on it, at 11.44:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.131) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.83:1 |
| White text | 11.44:1 |
Values
| HEX | #402A7B |
| RGB | rgb(64, 42, 123) |
| HSL | hsl(256, 49%, 32%) |
| OKLCH | oklch(36% 0.131 290.9) |
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 #402A7B | 11.44:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #402A7B | 1.83:1 | Fails | Lc 7.9 | Not readable |
| #402A7B text on white | 11.44:1 | AAA | Lc 95.9 | Preferred for body text |
| #402A7B 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
#E9E7FC
oklch(93.6% 0.028 290.2)
-
Step 200
200
#D8D4FB
oklch(88.5% 0.053 290)
-
Step 300
300
#C0B6FC
oklch(80.9% 0.098 290.6)
-
Step 400
400
#A28CFA
oklch(70.6% 0.157 291)
-
Step 500
500
#8D6BF7
oklch(63.1% 0.2 290.7)
-
Step 600
600
#794DE6
oklch(55.6% 0.218 290.7)
-
Step 700
700
#673CC8
oklch(49.1% 0.204 291.1)
-
Step 800
800
#5333A2
oklch(42.6% 0.169 290.7)
-
Step 900
900 (this color)
#402A7B
oklch(36% 0.131 290.9)
-
Step 950
950
#281C4B
oklch(27% 0.084 291.6)
#402A7B 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) | #003B7E | 0.076 |
| Deuteranopia (no green cones) | #003879 | 0.076 |
| Tritanopia (no blue cones) | #2E3D4E | 0.106 |
| Achromatopsia (no color) | #3A3A3A | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #402A7B
#402A7B
oklch(36% 0.131 290.9)
- #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 #402A7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.055
- Indigo #4B0082 ΔE 0.060
- Royal Purple #4B006E ΔE 0.070
- Blueberry #464196 ΔE 0.071
- Imperial Purple #480CA8 ΔE 0.082
- Twilight Blue #0A437A ΔE 0.083
- Marine Blue #01386A ΔE 0.084
- Midnight Blue #191970 ΔE 0.085
Use #402A7B 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.