#402F77
Closest named color: Dark Slate Blue (#483D8B). oklch(36.6% 0.118 290.2), rgb(64, 47, 119).
Aa
White text reads best on this color (11.10:1).
About this color
#402F77 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.118 and its hue 290°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.050 away. White text reads best on it, at 11.10:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.118) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.89:1 |
| White text | 11.10:1 |
Values
| HEX | #402F77 |
| RGB | rgb(64, 47, 119) |
| HSL | hsl(254, 43%, 33%) |
| OKLCH | oklch(36.6% 0.118 290.2) |
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 #402F77 | 11.10:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #402F77 | 1.89:1 | Fails | Lc 8.5 | Not readable |
| #402F77 text on white | 11.10:1 | AAA | Lc 95.4 | Preferred for body text |
| #402F77 text on black | 1.89:1 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E9E7FA
oklch(93.5% 0.026 290.7)
-
Step 200
200
#D8D4F8
oklch(88.4% 0.049 290.4)
-
Step 300
300
#BFB7F6
oklch(80.8% 0.088 290.1)
-
Step 400
400
#A08FF2
oklch(70.6% 0.142 290.1)
-
Step 500
500
#8B70ED
oklch(63.1% 0.181 290.2)
-
Step 600
600
#7754DB
oklch(55.5% 0.197 290.5)
-
Step 700
700
#6444BE
oklch(49.1% 0.182 290.1)
-
Step 800
800
#51399A
oklch(42.7% 0.151 289.9)
-
Step 900
900 (this color)
#402F77
oklch(36.6% 0.118 290.2)
-
Step 950
950
#271E48
oklch(27% 0.075 290.3)
#402F77 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) | #003D79 | 0.072 |
| Deuteranopia (no green cones) | #043A75 | 0.070 |
| Tritanopia (no blue cones) | #303F4E | 0.096 |
| Achromatopsia (no color) | #3C3C3C | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #402F77
#402F77
oklch(36.6% 0.118 290.2)
- #414200
#414200
oklch(36.6% 0.08 110.7)
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 #402F77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.050
- Blueberry #464196 ΔE 0.068
- Indigo #4B0082 ΔE 0.073
- Twilight Blue #0A437A ΔE 0.075
- Marine Blue #01386A ΔE 0.077
- Royal Purple #4B006E ΔE 0.079
- Cobalt #1E488F ΔE 0.080
- Prussian Blue #1D3557 ΔE 0.081
Use #402F77 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.