#423B75
Closest named color: Dark Slate Blue (#483D8B). oklch(38.9% 0.096 286.6), rgb(66, 59, 117).
Aa
White text reads best on this color (9.93:1).
About this color
#423B75 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.096 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.038 away. White text reads best on it, at 9.93:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.11:1 |
| White text | 9.93:1 |
Values
| HEX | #423B75 |
| RGB | rgb(66, 59, 117) |
| HSL | hsl(247, 33%, 35%) |
| OKLCH | oklch(38.9% 0.096 286.6) |
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 #423B75 | 9.93:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #423B75 | 2.11:1 | Fails | Lc 11.0 | Not readable |
| #423B75 text on white | 9.93:1 | AAA | Lc 92.9 | Preferred for body text |
| #423B75 text on black | 2.11:1 | Fails | Lc -9.6 | 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
#F5F5FC
oklch(97.2% 0.009 286.2)
-
Step 100
100
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D6D6F3
oklch(88.5% 0.04 285.6)
-
Step 300
300
#BCBAEE
oklch(80.8% 0.073 286.4)
-
Step 400
400
#9B95E5
oklch(70.7% 0.116 286.5)
-
Step 500
500
#8479DD
oklch(63.1% 0.147 286.4)
-
Step 600
600
#6F60CB
oklch(55.7% 0.16 286.4)
-
Step 700
700
#5D4EAF
oklch(49% 0.149 286.6)
-
Step 800
800
#4C418E
oklch(42.8% 0.123 286.5)
-
Step 900
900 (this color)
#423B75
oklch(38.9% 0.096 286.6)
-
Step 950
950
#252142
oklch(27% 0.06 287.2)
#423B75 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) | #244477 | 0.045 |
| Deuteranopia (no green cones) | #234174 | 0.044 |
| Tritanopia (no blue cones) | #334752 | 0.081 |
| Achromatopsia (no color) | #434343 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423B75
#423B75
oklch(38.9% 0.096 286.6)
- #4B4700
#4B4700
oklch(38.9% 0.083 106)
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 #423B75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.038
- Blueberry #464196 ΔE 0.056
- Twilight Blue #0A437A ΔE 0.061
- Cobalt #1E488F ΔE 0.064
- Dark Grey Blue #29465B ΔE 0.071
- Twilight #4E518B ΔE 0.071
- Light Navy #155084 ΔE 0.072
- Dusk Blue #26538D ΔE 0.076
Use #423B75 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.