#423478
Closest named color: Dark Slate Blue (#483D8B). oklch(37.8% 0.112 289.4), rgb(66, 52, 120).
Aa
White text reads best on this color (10.53:1).
About this color
#423478 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.112 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.040 away. White text reads best on it, at 10.53:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.99:1 |
| White text | 10.53:1 |
Values
| HEX | #423478 |
| RGB | rgb(66, 52, 120) |
| HSL | hsl(252, 40%, 34%) |
| OKLCH | oklch(37.8% 0.112 289.4) |
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 #423478 | 10.53:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #423478 | 1.99:1 | Fails | Lc 9.7 | Not readable |
| #423478 text on white | 10.53:1 | AAA | Lc 94.2 | Preferred for body text |
| #423478 text on black | 1.99:1 | Fails | Lc -8.4 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E9E8FA
oklch(93.7% 0.024 288.5)
-
Step 200
200
#D8D5F7
oklch(88.6% 0.047 289.5)
-
Step 300
300
#BFB8F4
oklch(80.9% 0.084 289.7)
-
Step 400
400
#9F91EE
oklch(70.7% 0.134 289.4)
-
Step 500
500
#8973E8
oklch(63.1% 0.17 289.2)
-
Step 600
600
#7558D6
oklch(55.6% 0.185 289.6)
-
Step 700
700
#6247BA
oklch(49.1% 0.173 289.3)
-
Step 800
800
#503B96
oklch(42.6% 0.143 289.6)
-
Step 900
900 (this color)
#423478
oklch(37.8% 0.112 289.4)
-
Step 950
950
#261F46
oklch(27% 0.07 289.1)
#423478 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) | #12407A | 0.063 |
| Deuteranopia (no green cones) | #133D76 | 0.062 |
| Tritanopia (no blue cones) | #324350 | 0.094 |
| Achromatopsia (no color) | #3F3F3F | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423478
#423478
oklch(37.8% 0.112 289.4)
- #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 #423478, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.040
- Blueberry #464196 ΔE 0.058
- Twilight Blue #0A437A ΔE 0.069
- Cobalt #1E488F ΔE 0.072
- Marine Blue #01386A ΔE 0.078
- Prussian Blue #1D3557 ΔE 0.082
- Indigo #4B0082 ΔE 0.084
- Rebecca Purple #663399 ΔE 0.086
Use #423478 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.