#40327E
Closest named color: Dark Slate Blue (#483D8B). oklch(37.7% 0.123 287.4), rgb(64, 50, 126).
Aa
White text reads best on this color (10.63:1).
About this color
#40327E is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.123 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 10.63:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.97:1 |
| White text | 10.63:1 |
Values
| HEX | #40327E |
| RGB | rgb(64, 50, 126) |
| HSL | hsl(251, 43%, 35%) |
| OKLCH | oklch(37.7% 0.123 287.4) |
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 #40327E | 10.63:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #40327E | 1.97:1 | Fails | Lc 9.6 | Not readable |
| #40327E text on white | 10.63:1 | AAA | Lc 94.3 | Preferred for body text |
| #40327E text on black | 1.97:1 | 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
#E8E8FB
oklch(93.7% 0.026 285.9)
-
Step 200
200
#D6D5FA
oklch(88.6% 0.051 286.6)
-
Step 300
300
#BCB8FA
oklch(80.9% 0.093 286.9)
-
Step 400
400
#9C90F7
oklch(70.7% 0.148 287.3)
-
Step 500
500
#8670F3
oklch(63% 0.189 287.4)
-
Step 600
600
#7254E2
oklch(55.6% 0.205 287.5)
-
Step 700
700
#6043C4
oklch(49.1% 0.191 287.5)
-
Step 800
800
#4E389F
oklch(42.7% 0.159 287.5)
-
Step 900
900 (this color)
#40327E
oklch(37.7% 0.123 287.4)
-
Step 950
950
#251E4A
oklch(27% 0.079 287.2)
#40327E 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) | #004081 | 0.069 |
| Deuteranopia (no green cones) | #003C7C | 0.069 |
| Tritanopia (no blue cones) | #2B4353 | 0.102 |
| Achromatopsia (no color) | #3E3E3E | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40327E
#40327E
oklch(37.7% 0.123 287.4)
- #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 #40327E, 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 0.055
- Cobalt #1E488F ΔE 0.070
- Twilight Blue #0A437A ΔE 0.071
- Indigo #4B0082 ΔE 0.077
- Marine Blue #01386A ΔE 0.080
- Rebecca Purple #663399 ΔE 0.083
- Sapphire #2138AB ΔE 0.085
Use #40327E 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.