#403F86
Closest named color: Dark Slate Blue (#483D8B). oklch(40.8% 0.116 280.6), rgb(64, 63, 134).
Aa
White text reads best on this color (9.23:1).
About this color
#403F86 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.116 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.016 away. White text reads best on it, at 9.23:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.27:1 |
| White text | 9.23:1 |
Values
| HEX | #403F86 |
| RGB | rgb(64, 63, 134) |
| HSL | hsl(241, 36%, 39%) |
| OKLCH | oklch(40.8% 0.116 280.6) |
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 #403F86 | 9.23:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #403F86 | 2.27:1 | Fails | Lc 12.9 | Not readable |
| #403F86 text on white | 9.23:1 | AAA | Lc 91.1 | Preferred for body text |
| #403F86 text on black | 2.27:1 | Fails | Lc -11.2 | 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 800.
-
Step 50
50
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E9F7
oklch(93.7% 0.019 279.5)
-
Step 200
200
#D4D7F2
oklch(88.5% 0.037 280.6)
-
Step 300
300
#B8BCEC
oklch(80.8% 0.068 281)
-
Step 400
400
#9499E3
oklch(70.8% 0.108 280.3)
-
Step 500
500
#7B7DDB
oklch(63% 0.139 280.7)
-
Step 600
600
#6565C8
oklch(55.6% 0.15 280.4)
-
Step 700
700
#5453AD
oklch(49.1% 0.14 280.4)
-
Step 800
800 (this color)
#403F86
oklch(40.8% 0.116 280.6)
-
Step 900
900
#3A3A70
oklch(37.7% 0.091 281.1)
-
Step 950
950
#222242
oklch(27% 0.059 281.7)
#403F86 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) | #1C4A89 | 0.047 |
| Deuteranopia (no green cones) | #154584 | 0.049 |
| Tritanopia (no blue cones) | #244F5C | 0.101 |
| Achromatopsia (no color) | #474747 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403F86
#403F86
oklch(40.8% 0.116 280.6)
- #544A00
#544A00
oklch(40.7% 0.085 100.5)
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 #403F86, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.016
- Blueberry #464196 ΔE 0.028
- Cobalt #1E488F ΔE 0.045
- Twilight #4E518B ΔE 0.057
- Dusk Blue #26538D ΔE 0.059
- Twilight Blue #0A437A ΔE 0.061
- Light Navy #155084 ΔE 0.061
- Dusk #4E5481 ΔE 0.068
Use #403F86 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.