#423B85
Closest named color: Dark Slate Blue (#483D8B). oklch(40.1% 0.12 283.9), rgb(66, 59, 133).
Aa
White text reads best on this color (9.56:1).
About this color
#423B85 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.120 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.015 away. White text reads best on it, at 9.56:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.19:1 |
| White text | 9.56:1 |
Values
| HEX | #423B85 |
| RGB | rgb(66, 59, 133) |
| HSL | hsl(246, 39%, 38%) |
| OKLCH | oklch(40.1% 0.12 283.9) |
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 #423B85 | 9.56:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #423B85 | 2.19:1 | Fails | Lc 12.1 | Not readable |
| #423B85 text on white | 9.56:1 | AAA | Lc 91.9 | Preferred for body text |
| #423B85 text on black | 2.19:1 | Fails | Lc -10.5 | 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
#E7E8FB
oklch(93.6% 0.026 283.5)
-
Step 200
200
#D4D5FA
oklch(88.4% 0.051 284.1)
-
Step 300
300
#B9B9F9
oklch(80.8% 0.09 284.2)
-
Step 400
400
#9692F6
oklch(70.6% 0.144 283.9)
-
Step 500
500
#7F74F3
oklch(63.2% 0.184 283.7)
-
Step 600
600
#6B58E1
oklch(55.6% 0.2 284.1)
-
Step 700
700
#5947C4
oklch(49.1% 0.186 283.7)
-
Step 800
800
#493B9E
oklch(42.6% 0.154 284.2)
-
Step 900
900 (this color)
#423B85
oklch(40.1% 0.12 283.9)
-
Step 950
950
#231F4A
oklch(27% 0.077 284.2)
#423B85 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) | #134788 | 0.057 |
| Deuteranopia (no green cones) | #0D4383 | 0.059 |
| Tritanopia (no blue cones) | #2A4B5A | 0.101 |
| Achromatopsia (no color) | #454545 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423B85
#423B85
oklch(40.1% 0.12 283.9)
- #504900
#504900
oklch(40% 0.084 103.2)
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 #423B85, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.015
- Blueberry #464196 ΔE 0.032
- Cobalt #1E488F ΔE 0.053
- Twilight #4E518B ΔE 0.065
- Twilight Blue #0A437A ΔE 0.065
- Dusk Blue #26538D ΔE 0.069
- Light Navy #155084 ΔE 0.071
- Rebecca Purple #663399 ΔE 0.074
Use #423B85 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.