#402C74
Closest named color: Dark Slate Blue (#483D8B). oklch(35.8% 0.118 292.2), rgb(64, 44, 116).
Aa
White text reads best on this color (11.47:1).
About this color
#402C74 is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.118 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 11.47:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.118) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.83:1 |
| White text | 11.47:1 |
Values
| HEX | #402C74 |
| RGB | rgb(64, 44, 116) |
| HSL | hsl(257, 45%, 31%) |
| OKLCH | oklch(35.8% 0.118 292.2) |
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 #402C74 | 11.47:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #402C74 | 1.83:1 | Fails | Lc 7.8 | Not readable |
| #402C74 text on white | 11.47:1 | AAA | Lc 96.1 | Preferred for body text |
| #402C74 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#EAE7FA
oklch(93.6% 0.026 293.1)
-
Step 200
200
#D9D4F8
oklch(88.5% 0.049 291.7)
-
Step 300
300
#C1B7F6
oklch(81% 0.088 291.6)
-
Step 400
400
#A38EF1
oklch(70.6% 0.143 292.1)
-
Step 500
500
#8F6FEC
oklch(63.2% 0.181 292.2)
-
Step 600
600
#7A53DA
oklch(55.6% 0.197 292.1)
-
Step 700
700
#6742BD
oklch(49% 0.183 292.1)
-
Step 800
800
#543799
oklch(42.6% 0.152 292.3)
-
Step 900
900 (this color)
#402C74
oklch(35.8% 0.118 292.2)
-
Step 950
950
#281E47
oklch(27% 0.074 292)
#402C74 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) | #003A76 | 0.075 |
| Deuteranopia (no green cones) | #023872 | 0.074 |
| Tritanopia (no blue cones) | #313C4B | 0.096 |
| Achromatopsia (no color) | #393939 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #402C74
#402C74
oklch(35.8% 0.118 292.2)
- #3E4000
#3E4000
oklch(35.8% 0.079 111.8)
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 #402C74, 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
- Indigo #4B0082 ΔE 0.068
- Royal Purple #4B006E ΔE 0.072
- Blueberry #464196 ΔE 0.076
- Marine Blue #01386A ΔE 0.079
- Prussian Blue #1D3557 ΔE 0.080
- Twilight Blue #0A437A ΔE 0.080
- Midnight Blue #191970 ΔE 0.086
Use #402C74 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.