#423778
Closest named color: Dark Slate Blue (#483D8B). oklch(38.3% 0.107 288.1), rgb(66, 55, 120).
Aa
White text reads best on this color (10.24:1).
About this color
#423778 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.107 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.036 away. White text reads best on it, at 10.24:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.04:1 |
| White text | 10.24:1 |
Values
| HEX | #423778 |
| RGB | rgb(66, 55, 120) |
| HSL | hsl(250, 37%, 34%) |
| OKLCH | oklch(38.3% 0.107 288.1) |
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 #423778 | 10.24:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #423778 | 2.04:1 | Fails | Lc 10.3 | Not readable |
| #423778 text on white | 10.24:1 | AAA | Lc 93.6 | Preferred for body text |
| #423778 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
#D7D5F6
oklch(88.5% 0.045 288.2)
-
Step 300
300
#BDB9F2
oklch(80.9% 0.08 287.7)
-
Step 400
400
#9D93EC
oklch(70.8% 0.128 287.8)
-
Step 500
500
#8775E5
oklch(63.1% 0.163 288.2)
-
Step 600
600
#725BD3
oklch(55.6% 0.177 288.1)
-
Step 700
700
#604AB7
oklch(49.2% 0.165 288.1)
-
Step 800
800
#4E3D94
oklch(42.7% 0.137 288.2)
-
Step 900
900 (this color)
#423778
oklch(38.3% 0.107 288.1)
-
Step 950
950
#252045
oklch(27% 0.067 287.2)
#423778 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) | #1A427A | 0.056 |
| Deuteranopia (no green cones) | #1A3F77 | 0.055 |
| Tritanopia (no blue cones) | #324552 | 0.089 |
| Achromatopsia (no color) | #414141 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423778
#423778
oklch(38.3% 0.107 288.1)
- #484600
#484600
oklch(38.4% 0.083 107.9)
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 #423778, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.036
- Blueberry #464196 ΔE 0.055
- Twilight Blue #0A437A ΔE 0.065
- Cobalt #1E488F ΔE 0.067
- Marine Blue #01386A ΔE 0.078
- Twilight #4E518B ΔE 0.079
- Light Navy #155084 ΔE 0.080
- Dark Grey Blue #29465B ΔE 0.081
Use #423778 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.