#423A75
Closest named color: Dark Slate Blue (#483D8B). oklch(38.7% 0.097 287.2), rgb(66, 58, 117).
Aa
White text reads best on this color (10.02:1).
About this color
#423A75 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.097 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.039 away. White text reads best on it, at 10.02:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.09:1 |
| White text | 10.02:1 |
Values
| HEX | #423A75 |
| RGB | rgb(66, 58, 117) |
| HSL | hsl(248, 34%, 34%) |
| OKLCH | oklch(38.7% 0.097 287.2) |
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 #423A75 | 10.02:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #423A75 | 2.09:1 | Fails | Lc 10.8 | Not readable |
| #423A75 text on white | 10.02:1 | AAA | Lc 93.1 | Preferred for body text |
| #423A75 text on black | 2.09:1 | Fails | Lc -9.4 | 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
#F5F5FC
oklch(97.2% 0.009 286.2)
-
Step 100
100
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D7D6F3
oklch(88.6% 0.04 287.1)
-
Step 300
300
#BDBAEE
oklch(80.9% 0.073 287.3)
-
Step 400
400
#9C95E6
oklch(70.8% 0.117 287)
-
Step 500
500
#8578DE
oklch(63% 0.15 287.1)
-
Step 600
600
#705FCC
oklch(55.7% 0.162 287)
-
Step 700
700
#5E4EB0
oklch(49.2% 0.15 287)
-
Step 800
800
#4D408F
oklch(42.7% 0.126 287.4)
-
Step 900
900 (this color)
#423A75
oklch(38.7% 0.097 287.2)
-
Step 950
950
#252143
oklch(27.1% 0.062 286.9)
#423A75 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) | #224477 | 0.048 |
| Deuteranopia (no green cones) | #224174 | 0.046 |
| Tritanopia (no blue cones) | #334652 | 0.081 |
| Achromatopsia (no color) | #424242 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423A75
#423A75
oklch(38.7% 0.097 287.2)
- #4A4700
#4A4700
oklch(38.8% 0.083 106.9)
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 #423A75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.039
- Blueberry #464196 ΔE 0.057
- Twilight Blue #0A437A ΔE 0.062
- Cobalt #1E488F ΔE 0.065
- Dark Grey Blue #29465B ΔE 0.072
- Twilight #4E518B ΔE 0.074
- Light Navy #155084 ΔE 0.074
- Marine Blue #01386A ΔE 0.077
Use #423A75 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.