#402E66
Closest named color: Prussian Blue (#1D3557). oklch(35.1% 0.095 296), rgb(64, 46, 102).
Aa
White text reads best on this color (11.66:1).
About this color
#402E66 is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.095 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.064 away. White text reads best on it, at 11.66:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.095) |
| Temperature | in between |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.80:1 |
| White text | 11.66:1 |
Values
| HEX | #402E66 |
| RGB | rgb(64, 46, 102) |
| HSL | hsl(259, 38%, 29%) |
| OKLCH | oklch(35.1% 0.095 296) |
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 #402E66 | 11.66:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #402E66 | 1.80:1 | Fails | Lc 0.0 | Not readable |
| #402E66 text on white | 11.66:1 | AAA | Lc 96.6 | Preferred for body text |
| #402E66 text on black | 1.80:1 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EBE7F6
oklch(93.5% 0.021 298.2)
-
Step 200
200
#DBD4F1
oklch(88.4% 0.04 296.6)
-
Step 300
300
#C4B8EA
oklch(80.9% 0.071 295.8)
-
Step 400
400
#A791E0
oklch(70.7% 0.115 296.1)
-
Step 500
500
#9274D7
oklch(63.1% 0.147 295.9)
-
Step 600
600
#7D5BC4
oklch(55.6% 0.158 295.8)
-
Step 700
700
#6A4AA9
oklch(49.1% 0.147 296.1)
-
Step 800
800
#563D89
oklch(42.7% 0.122 296)
-
Step 900
900 (this color)
#402E66
oklch(35.1% 0.095 296)
-
Step 950
950
#291F40
oklch(26.9% 0.061 296)
#402E66 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) | #183968 | 0.061 |
| Deuteranopia (no green cones) | #1D3865 | 0.057 |
| Tritanopia (no blue cones) | #373945 | 0.075 |
| Achromatopsia (no color) | #383838 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #402E66
#402E66
oklch(35.1% 0.095 296)
- #393F00
#393F00
oklch(35% 0.08 115.7)
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 #402E66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.072
- Marine Blue #01386A ΔE 0.074
- Space Cadet #2B2D42 ΔE 0.075
- Royal Purple #4B006E ΔE 0.080
- Marine #042E60 ΔE 0.080
- Gunmetal #293241 ΔE 0.081
- Dark Blue Grey #1F3B4D ΔE 0.081
Use #402E66 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.