#423771
Closest named color: Dark Slate Blue (#483D8B). oklch(37.9% 0.096 289.7), rgb(66, 55, 113).
Aa
White text reads best on this color (10.41:1).
About this color
#423771 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.096 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.046 away. White text reads best on it, at 10.41:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.01:1 |
| White text | 10.41:1 |
Values
| HEX | #423771 |
| RGB | rgb(66, 55, 113) |
| HSL | hsl(251, 35%, 33%) |
| OKLCH | oklch(37.9% 0.096 289.7) |
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 #423771 | 10.41:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #423771 | 2.01:1 | Fails | Lc 9.9 | Not readable |
| #423771 text on white | 10.41:1 | AAA | Lc 94.0 | Preferred for body text |
| #423771 text on black | 2.01:1 | Fails | Lc -8.5 | 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
#BFB9ED
oklch(80.8% 0.073 289.9)
-
Step 400
400
#9F94E4
oklch(70.7% 0.116 289.4)
-
Step 500
500
#8977DC
oklch(63.1% 0.148 289.6)
-
Step 600
600
#745EC9
oklch(55.6% 0.16 289.6)
-
Step 700
700
#624DAE
oklch(49.2% 0.149 289.8)
-
Step 800
800
#4F3F8D
oklch(42.6% 0.124 289.5)
-
Step 900
900 (this color)
#423771
oklch(37.9% 0.096 289.7)
-
Step 950
950
#262042
oklch(26.9% 0.062 289.7)
#423771 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) | #204173 | 0.051 |
| Deuteranopia (no green cones) | #213E70 | 0.049 |
| Tritanopia (no blue cones) | #35434E | 0.081 |
| Achromatopsia (no color) | #404040 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423771
#423771
oklch(37.9% 0.096 289.7)
- #454500
#454500
oklch(37.8% 0.082 109.8)
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 #423771, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.046
- Blueberry #464196 ΔE 0.065
- Twilight Blue #0A437A ΔE 0.066
- Cobalt #1E488F ΔE 0.073
- Dark Grey Blue #29465B ΔE 0.073
- Prussian Blue #1D3557 ΔE 0.074
- Marine Blue #01386A ΔE 0.075
- Light Navy #155084 ΔE 0.082
Use #423771 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.