#40346E
Closest named color: Dark Slate Blue (#483D8B). oklch(36.9% 0.097 290.4), rgb(64, 52, 110).
Aa
White text reads best on this color (10.85:1).
About this color
#40346E is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.097 and its hue 290°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.054 away. White text reads best on it, at 10.85:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.097) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.93:1 |
| White text | 10.85:1 |
Values
| HEX | #40346E |
| RGB | rgb(64, 52, 110) |
| HSL | hsl(252, 36%, 32%) |
| OKLCH | oklch(36.9% 0.097 290.4) |
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 #40346E | 10.85:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #40346E | 1.93:1 | Fails | Lc 8.9 | Not readable |
| #40346E text on white | 10.85:1 | AAA | Lc 95.0 | Preferred for body text |
| #40346E text on black | 1.93:1 | Fails | Lc -7.6 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F7
oklch(93.6% 0.02 289.1)
-
Step 200
200
#D8D5F3
oklch(88.5% 0.041 290.1)
-
Step 300
300
#C0B9ED
oklch(80.9% 0.073 290.8)
-
Step 400
400
#A093E4
oklch(70.6% 0.117 290.4)
-
Step 500
500
#8A77DC
oklch(63.2% 0.148 290.1)
-
Step 600
600
#755DC9
oklch(55.6% 0.161 290.4)
-
Step 700
700
#634CAE
oklch(49.1% 0.15 290.6)
-
Step 800
800
#503F8D
oklch(42.7% 0.124 290.2)
-
Step 900
900 (this color)
#40346E
oklch(36.9% 0.097 290.4)
-
Step 950
950
#272042
oklch(27% 0.062 291.2)
#40346E 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) | #1D3E70 | 0.052 |
| Deuteranopia (no green cones) | #1E3C6D | 0.051 |
| Tritanopia (no blue cones) | #34404C | 0.079 |
| Achromatopsia (no color) | #3D3D3D | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40346E
#40346E
oklch(36.9% 0.097 290.4)
- #424300
#424300
oklch(37% 0.081 110.7)
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 #40346E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.068
- Twilight Blue #0A437A ΔE 0.068
- Marine Blue #01386A ΔE 0.071
- Blueberry #464196 ΔE 0.073
- Dark Grey Blue #29465B ΔE 0.075
- Cobalt #1E488F ΔE 0.079
- Dark Blue Grey #1F3B4D ΔE 0.083
Use #40346E 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.