#402F70
Closest named color: Dark Slate Blue (#483D8B). oklch(36% 0.108 292.2), rgb(64, 47, 112).
Aa
White text reads best on this color (11.29:1).
About this color
#402F70 is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.108 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.058 away. White text reads best on it, at 11.29:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.108) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.85:1 |
| White text | 11.29:1 |
Values
| HEX | #402F70 |
| RGB | rgb(64, 47, 112) |
| HSL | hsl(256, 41%, 31%) |
| OKLCH | oklch(36% 0.108 292.2) |
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 #402F70 | 11.29:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #402F70 | 1.85:1 | Fails | Lc 8.1 | Not readable |
| #402F70 text on white | 11.29:1 | AAA | Lc 95.8 | Preferred for body text |
| #402F70 text on black | 1.85:1 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#EAE7F9
oklch(93.6% 0.024 293.6)
-
Step 200
200
#D9D4F5
oklch(88.4% 0.045 292.4)
-
Step 300
300
#C1B8F1
oklch(81% 0.08 291.7)
-
Step 400
400
#A390EA
oklch(70.6% 0.13 292.4)
-
Step 500
500
#8E72E4
oklch(63.1% 0.166 292.3)
-
Step 600
600
#7958D1
oklch(55.6% 0.179 292.2)
-
Step 700
700
#6647B5
oklch(49.1% 0.166 292.1)
-
Step 800
800
#533B93
oklch(42.7% 0.139 292.1)
-
Step 900
900 (this color)
#402F70
oklch(36% 0.108 292.2)
-
Step 950
950
#281F45
oklch(27.1% 0.069 292.1)
#402F70 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) | #0E3B72 | 0.066 |
| Deuteranopia (no green cones) | #13396F | 0.063 |
| Tritanopia (no blue cones) | #333D4A | 0.088 |
| Achromatopsia (no color) | #3A3A3A | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #402F70
#402F70
oklch(36% 0.108 292.2)
- #3E4100
#3E4100
oklch(36% 0.08 112.7)
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 #402F70, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.073
- Marine Blue #01386A ΔE 0.075
- Twilight Blue #0A437A ΔE 0.076
- Blueberry #464196 ΔE 0.076
- Indigo #4B0082 ΔE 0.078
- Royal Purple #4B006E ΔE 0.079
- Marine #042E60 ΔE 0.084
Use #402F70 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.