#403180
Closest named color: Dark Slate Blue (#483D8B). oklch(37.6% 0.128 287.3), rgb(64, 49, 128).
Aa
White text reads best on this color (10.66:1).
About this color
#403180 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.128 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.038 away. White text reads best on it, at 10.66:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.96:1 |
| White text | 10.66:1 |
Values
| HEX | #403180 |
| RGB | rgb(64, 49, 128) |
| HSL | hsl(251, 45%, 35%) |
| OKLCH | oklch(37.6% 0.128 287.3) |
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 #403180 | 10.66:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #403180 | 1.96:1 | Fails | Lc 9.5 | Not readable |
| #403180 text on white | 10.66:1 | AAA | Lc 94.4 | Preferred for body text |
| #403180 text on black | 1.96:1 | Fails | Lc -8.2 | 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
#E8E7FC
oklch(93.5% 0.028 288)
-
Step 200
200
#D6D4FB
oklch(88.4% 0.053 287.6)
-
Step 300
300
#BCB7FC
oklch(80.8% 0.097 287.3)
-
Step 400
400
#9C8FFA
oklch(70.7% 0.153 287.4)
-
Step 500
500
#866FF7
oklch(63.1% 0.195 287.2)
-
Step 600
600
#7252E6
oklch(55.6% 0.213 287.3)
-
Step 700
700
#6041C8
oklch(49.1% 0.198 287.3)
-
Step 800
800
#4E37A2
oklch(42.8% 0.164 287.2)
-
Step 900
900 (this color)
#403180
oklch(37.6% 0.128 287.3)
-
Step 950
950
#251E4B
oklch(27% 0.08 286.9)
#403180 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) | #004083 | 0.070 |
| Deuteranopia (no green cones) | #003C7E | 0.069 |
| Tritanopia (no blue cones) | #2A4353 | 0.106 |
| Achromatopsia (no color) | #3E3E3E | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403180
#403180
oklch(37.6% 0.128 287.3)
- #464400
#464400
oklch(37.6% 0.081 107.8)
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 #403180, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.038
- Blueberry #464196 ΔE 0.054
- Cobalt #1E488F ΔE 0.070
- Twilight Blue #0A437A ΔE 0.073
- Indigo #4B0082 ΔE 0.074
- Marine Blue #01386A ΔE 0.082
- Rebecca Purple #663399 ΔE 0.082
- Imperial Purple #480CA8 ΔE 0.082
Use #403180 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.