#423777
Closest named color: Dark Slate Blue (#483D8B). oklch(38.3% 0.105 288.3), rgb(66, 55, 119).
Aa
White text reads best on this color (10.27:1).
About this color
#423777 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.105 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.037 away. White text reads best on it, at 10.27:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.04:1 |
| White text | 10.27:1 |
Values
| HEX | #423777 |
| RGB | rgb(66, 55, 119) |
| HSL | hsl(250, 37%, 34%) |
| OKLCH | oklch(38.3% 0.105 288.3) |
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 #423777 | 10.27:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #423777 | 2.04:1 | Fails | Lc 10.3 | Not readable |
| #423777 text on white | 10.27:1 | AAA | Lc 93.7 | Preferred for body text |
| #423777 text on black | 2.04:1 | Fails | Lc -8.9 | 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
#E9E8F9
oklch(93.7% 0.023 288.7)
-
Step 200
200
#D7D5F5
oklch(88.5% 0.044 288.3)
-
Step 300
300
#BEB9F1
oklch(80.9% 0.079 288.6)
-
Step 400
400
#9D93EA
oklch(70.7% 0.125 288)
-
Step 500
500
#8775E4
oklch(63% 0.162 288.3)
-
Step 600
600
#725BD2
oklch(55.6% 0.176 288.2)
-
Step 700
700
#604AB6
oklch(49.1% 0.164 288.2)
-
Step 800
800
#4E3E93
oklch(42.8% 0.134 288)
-
Step 900
900 (this color)
#423777
oklch(38.3% 0.105 288.3)
-
Step 950
950
#262045
oklch(27.1% 0.067 288.6)
#423777 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) | #1B4279 | 0.055 |
| Deuteranopia (no green cones) | #1B3F76 | 0.054 |
| Tritanopia (no blue cones) | #324451 | 0.087 |
| Achromatopsia (no color) | #414141 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423777
#423777
oklch(38.3% 0.105 288.3)
- #474600
#474600
oklch(38.3% 0.083 108.8)
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 #423777, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.037
- Blueberry #464196 ΔE 0.056
- Twilight Blue #0A437A ΔE 0.065
- Cobalt #1E488F ΔE 0.068
- Marine Blue #01386A ΔE 0.077
- Twilight #4E518B ΔE 0.079
- Light Navy #155084 ΔE 0.080
- Dark Grey Blue #29465B ΔE 0.080
Use #423777 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.