#423F6E
Closest named color: Dark Slate Blue (#483D8B). oklch(39.3% 0.078 285.1), rgb(66, 63, 110).
Aa
White text reads best on this color (9.68:1).
About this color
#423F6E is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.078 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.051 away. White text reads best on it, at 9.68:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.16:1 |
| White text | 9.68:1 |
Values
| HEX | #423F6E |
| RGB | rgb(66, 63, 110) |
| HSL | hsl(244, 27%, 34%) |
| OKLCH | oklch(39.3% 0.078 285.1) |
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 #423F6E | 9.68:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #423F6E | 2.16:1 | Fails | Lc 11.6 | Not readable |
| #423F6E text on white | 9.68:1 | AAA | Lc 92.4 | Preferred for body text |
| #423F6E text on black | 2.16:1 | Fails | Lc -10.1 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E8E9F5
oklch(93.7% 0.016 282.3)
-
Step 200
200
#D6D7EE
oklch(88.5% 0.031 283.8)
-
Step 300
300
#BCBCE6
oklch(80.9% 0.059 285)
-
Step 400
400
#9A98D9
oklch(70.6% 0.094 285.1)
-
Step 500
500
#837ECF
oklch(63.2% 0.12 285.2)
-
Step 600
600
#6D66BC
oklch(55.7% 0.13 285)
-
Step 700
700
#5B54A2
oklch(49.1% 0.122 285.1)
-
Step 800
800
#4A4583
oklch(42.6% 0.1 285)
-
Step 900
900 (this color)
#423F6E
oklch(39.3% 0.078 285.1)
-
Step 950
950
#24233E
oklch(27.1% 0.05 284.3)
#423F6E 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) | #2F4670 | 0.032 |
| Deuteranopia (no green cones) | #2E436D | 0.030 |
| Tritanopia (no blue cones) | #364851 | 0.067 |
| Achromatopsia (no color) | #444444 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423F6E
#423F6E
oklch(39.3% 0.078 285.1)
- #4C4809
#4C4809
oklch(39.3% 0.079 105.6)
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 #423F6E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.056
- Twilight Blue #0A437A ΔE 0.061
- Blueberry #464196 ΔE 0.067
- Light Navy #155084 ΔE 0.067
- Cobalt #1E488F ΔE 0.068
- Dusk #4E5481 ΔE 0.068
- Twilight #4E518B ΔE 0.069
Use #423F6E 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.