#423171
Closest named color: Dark Slate Blue (#483D8B). oklch(36.7% 0.106 292.6), rgb(66, 49, 113).
Aa
White text reads best on this color (10.99:1).
About this color
#423171 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.106 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.053 away. White text reads best on it, at 10.99:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.106) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.90:1 |
| White text | 10.99:1 |
Values
| HEX | #423171 |
| RGB | rgb(66, 49, 113) |
| HSL | hsl(256, 40%, 32%) |
| OKLCH | oklch(36.7% 0.106 292.6) |
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 #423171 | 10.99:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #423171 | 1.90:1 | Fails | Lc 8.7 | Not readable |
| #423171 text on white | 10.99:1 | AAA | Lc 95.2 | Preferred for body text |
| #423171 text on black | 1.90:1 | Fails | Lc -7.4 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#EAE7F8
oklch(93.5% 0.023 294.1)
-
Step 200
200
#D9D4F5
oklch(88.4% 0.045 292.4)
-
Step 300
300
#C2B8F0
oklch(81% 0.079 292.7)
-
Step 400
400
#A391E9
oklch(70.8% 0.127 292.2)
-
Step 500
500
#8E73E2
oklch(63.2% 0.162 292.3)
-
Step 600
600
#7A58D0
oklch(55.7% 0.177 292.8)
-
Step 700
700
#6747B4
oklch(49.1% 0.165 292.8)
-
Step 800
800
#533B91
oklch(42.6% 0.136 292.5)
-
Step 900
900 (this color)
#423171
oklch(36.7% 0.106 292.6)
-
Step 950
950
#281F44
oklch(27% 0.067 292.5)
#423171 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) | #143D73 | 0.065 |
| Deuteranopia (no green cones) | #173B70 | 0.062 |
| Tritanopia (no blue cones) | #363E4C | 0.085 |
| Achromatopsia (no color) | #3C3C3C | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423171
#423171
oklch(36.7% 0.106 292.6)
- #404300
#404300
oklch(36.8% 0.082 112.6)
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 #423171, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.053
- Blueberry #464196 ΔE 0.072
- Twilight Blue #0A437A ΔE 0.075
- Prussian Blue #1D3557 ΔE 0.075
- Marine Blue #01386A ΔE 0.077
- Indigo #4B0082 ΔE 0.081
- Cobalt #1E488F ΔE 0.083
- Royal Purple #4B006E ΔE 0.083
Use #423171 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.