#423166
Closest named color: Prussian Blue (#1D3557). oklch(35.9% 0.09 296.4), rgb(66, 49, 102).
Aa
White text reads best on this color (11.27:1).
About this color
#423166 is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.090 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.065 away. White text reads best on it, at 11.27:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.090) |
| Temperature | in between |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.86:1 |
| White text | 11.27:1 |
Values
| HEX | #423166 |
| RGB | rgb(66, 49, 102) |
| HSL | hsl(259, 35%, 30%) |
| OKLCH | oklch(35.9% 0.09 296.4) |
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 #423166 | 11.27:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #423166 | 1.86:1 | Fails | Lc 8.0 | Not readable |
| #423166 text on white | 11.27:1 | AAA | Lc 95.9 | Preferred for body text |
| #423166 text on black | 1.86:1 | Fails | Lc 0.0 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EBE7F6
oklch(93.5% 0.021 298.2)
-
Step 200
200
#DBD5F0
oklch(88.6% 0.037 295.8)
-
Step 300
300
#C4B8E8
oklch(80.9% 0.068 296.3)
-
Step 400
400
#A792DC
oklch(70.7% 0.108 296.6)
-
Step 500
500
#9276D2
oklch(63.1% 0.137 296.3)
-
Step 600
600
#7D5CBF
oklch(55.5% 0.15 296.6)
-
Step 700
700
#6A4CA5
oklch(49.2% 0.138 296.5)
-
Step 800
800
#563E86
oklch(42.6% 0.116 296.5)
-
Step 900
900 (this color)
#423166
oklch(35.9% 0.09 296.4)
-
Step 950
950
#29203F
oklch(27% 0.057 295.7)
#423166 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) | #1F3B68 | 0.056 |
| Deuteranopia (no green cones) | #223A65 | 0.053 |
| Tritanopia (no blue cones) | #3A3B46 | 0.072 |
| Achromatopsia (no color) | #3B3B3B | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423166
#423166
oklch(35.9% 0.09 296.4)
- #3B4200
#3B4200
oklch(36% 0.083 116.3)
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 #423166, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.065
- Dark Slate Blue #483D8B ΔE 0.068
- Marine Blue #01386A ΔE 0.075
- Dark Grey Blue #29465B ΔE 0.077
- Space Cadet #2B2D42 ΔE 0.077
- Twilight Blue #0A437A ΔE 0.079
- Dark Blue Grey #1F3B4D ΔE 0.079
- Gunmetal #293241 ΔE 0.081
Use #423166 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.