#423A89
Closest named color: Dark Slate Blue (#483D8B). oklch(40.2% 0.127 283.7), rgb(66, 58, 137).
Aa
White text reads best on this color (9.55:1).
About this color
#423A89 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.127 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.014 away. White text reads best on it, at 9.55:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.19:1 |
| White text | 9.55:1 |
Values
| HEX | #423A89 |
| RGB | rgb(66, 58, 137) |
| HSL | hsl(246, 41%, 38%) |
| OKLCH | oklch(40.2% 0.127 283.7) |
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 #423A89 | 9.55:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #423A89 | 2.19:1 | Fails | Lc 12.1 | Not readable |
| #423A89 text on white | 9.55:1 | AAA | Lc 91.8 | Preferred for body text |
| #423A89 text on black | 2.19:1 | Fails | Lc -10.6 | 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
#F4F5FE
oklch(97.2% 0.012 281.1)
-
Step 100
100
#E7E8FC
oklch(93.6% 0.027 283.6)
-
Step 200
200
#D4D5FC
oklch(88.5% 0.053 284.1)
-
Step 300
300
#B8B9FD
oklch(80.9% 0.096 283.4)
-
Step 400
400
#9691FB
oklch(70.6% 0.152 283.9)
-
Step 500
500
#7F72F9
oklch(63.2% 0.194 283.7)
-
Step 600
600
#6A55E8
oklch(55.6% 0.212 283.6)
-
Step 700
700
#5944CA
oklch(49.1% 0.198 283.5)
-
Step 800
800
#4839A3
oklch(42.6% 0.163 283.5)
-
Step 900
900 (this color)
#423A89
oklch(40.2% 0.127 283.7)
-
Step 950
950
#231F4C
oklch(27.1% 0.08 283.7)
#423A89 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) | #05488C | 0.064 |
| Deuteranopia (no green cones) | #004387 | 0.064 |
| Tritanopia (no blue cones) | #274C5B | 0.109 |
| Achromatopsia (no color) | #454545 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423A89
#423A89
oklch(40.2% 0.127 283.7)
- #504A00
#504A00
oklch(40.2% 0.085 104.3)
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 #423A89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.014
- Blueberry #464196 ΔE 0.028
- Cobalt #1E488F ΔE 0.053
- Twilight #4E518B ΔE 0.067
- Twilight Blue #0A437A ΔE 0.069
- Rebecca Purple #663399 ΔE 0.070
- Dusk Blue #26538D ΔE 0.071
- Sapphire #2138AB ΔE 0.071
Use #423A89 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.