#423E73
Closest named color: Dark Slate Blue (#483D8B). oklch(39.4% 0.088 285.1), rgb(66, 62, 115).
Aa
White text reads best on this color (9.68:1).
About this color
#423E73 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.088 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.042 away. White text reads best on it, at 9.68:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.16:1 |
| White text | 9.68:1 |
Values
| HEX | #423E73 |
| RGB | rgb(66, 62, 115) |
| HSL | hsl(245, 30%, 35%) |
| OKLCH | oklch(39.4% 0.088 285.1) |
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 #423E73 | 9.68:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #423E73 | 2.16:1 | Fails | Lc 11.6 | Not readable |
| #423E73 text on white | 9.68:1 | AAA | Lc 92.3 | Preferred for body text |
| #423E73 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
#E8E8F7
oklch(93.5% 0.02 286)
-
Step 200
200
#D6D6F1
oklch(88.4% 0.037 285.6)
-
Step 300
300
#BCBBEA
oklch(80.9% 0.066 285.8)
-
Step 400
400
#9A97E0
oklch(70.7% 0.106 285.2)
-
Step 500
500
#827CD7
oklch(63.2% 0.134 284.9)
-
Step 600
600
#6D63C4
oklch(55.6% 0.146 285.3)
-
Step 700
700
#5B52AA
oklch(49.2% 0.136 284.9)
-
Step 800
800
#4A4389
oklch(42.6% 0.113 285.1)
-
Step 900
900 (this color)
#423E73
oklch(39.4% 0.088 285.1)
-
Step 950
950
#242240
oklch(27% 0.055 285.1)
#423E73 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) | #2B4675 | 0.037 |
| Deuteranopia (no green cones) | #294372 | 0.037 |
| Tritanopia (no blue cones) | #344953 | 0.075 |
| Achromatopsia (no color) | #444444 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423E73
#423E73
oklch(39.4% 0.088 285.1)
- #4D4800
#4D4800
oklch(39.4% 0.084 105.1)
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 #423E73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.042
- Blueberry #464196 ΔE 0.059
- Twilight Blue #0A437A ΔE 0.060
- Cobalt #1E488F ΔE 0.063
- Dark Grey Blue #29465B ΔE 0.064
- Twilight #4E518B ΔE 0.066
- Light Navy #155084 ΔE 0.067
- Dusk #4E5481 ΔE 0.069
Use #423E73 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.