#40386E
Closest named color: Dark Slate Blue (#483D8B). oklch(37.7% 0.09 288.1), rgb(64, 56, 110).
Aa
White text reads best on this color (10.45:1).
About this color
#40386E is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.090 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.051 away. White text reads best on it, at 10.45:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.00:1 |
| White text | 10.45:1 |
Values
| HEX | #40386E |
| RGB | rgb(64, 56, 110) |
| HSL | hsl(249, 33%, 33%) |
| OKLCH | oklch(37.7% 0.09 288.1) |
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 #40386E | 10.45:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #40386E | 2.00:1 | Fails | Lc 9.8 | Not readable |
| #40386E text on white | 10.45:1 | AAA | Lc 94.1 | Preferred for body text |
| #40386E text on black | 2.00:1 | Fails | Lc -8.4 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E9E8F7
oklch(93.6% 0.02 289.1)
-
Step 200
200
#D7D6F1
oklch(88.5% 0.037 287.3)
-
Step 300
300
#BEBAEA
oklch(80.8% 0.067 288.6)
-
Step 400
400
#9D95E0
oklch(70.6% 0.108 288.2)
-
Step 500
500
#877AD7
oklch(63.2% 0.137 288.2)
-
Step 600
600
#7161C5
oklch(55.6% 0.15 287.9)
-
Step 700
700
#5F4FAA
oklch(49% 0.14 288.2)
-
Step 800
800
#4D428A
oklch(42.8% 0.115 287.5)
-
Step 900
900 (this color)
#40386E
oklch(37.7% 0.09 288.1)
-
Step 950
950
#252140
oklch(26.9% 0.057 287.9)
#40386E 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) | #244170 | 0.044 |
| Deuteranopia (no green cones) | #243E6D | 0.042 |
| Tritanopia (no blue cones) | #33434D | 0.077 |
| Achromatopsia (no color) | #3F3F3F | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40386E
#40386E
oklch(37.7% 0.09 288.1)
- #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 #40386E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.051
- Twilight Blue #0A437A ΔE 0.063
- Dark Grey Blue #29465B ΔE 0.067
- Prussian Blue #1D3557 ΔE 0.068
- Blueberry #464196 ΔE 0.070
- Marine Blue #01386A ΔE 0.070
- Cobalt #1E488F ΔE 0.073
- Dark Blue Grey #1F3B4D ΔE 0.079
Use #40386E 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.