#423D73
Closest named color: Dark Slate Blue (#483D8B). oklch(39.2% 0.089 285.7), rgb(66, 61, 115).
Aa
White text reads best on this color (9.78:1).
About this color
#423D73 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.089 and its hue 286°. 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 9.78:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.14:1 |
| White text | 9.78:1 |
Values
| HEX | #423D73 |
| RGB | rgb(66, 61, 115) |
| HSL | hsl(246, 31%, 35%) |
| OKLCH | oklch(39.2% 0.089 285.7) |
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 #423D73 | 9.78:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #423D73 | 2.14:1 | Fails | Lc 11.4 | Not readable |
| #423D73 text on white | 9.78:1 | AAA | Lc 92.6 | Preferred for body text |
| #423D73 text on black | 2.14:1 | Fails | Lc -9.9 | 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
#BCBBEB
oklch(80.9% 0.067 285.7)
-
Step 400
400
#9A97E1
oklch(70.8% 0.107 285.2)
-
Step 500
500
#837BD8
oklch(63.1% 0.137 285.7)
-
Step 600
600
#6E62C5
oklch(55.6% 0.149 286)
-
Step 700
700
#5C51AB
oklch(49.2% 0.139 285.7)
-
Step 800
800
#4B438A
oklch(42.8% 0.114 285.7)
-
Step 900
900 (this color)
#423D73
oklch(39.2% 0.089 285.7)
-
Step 950
950
#242241
oklch(27.1% 0.057 284.9)
#423D73 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) | #294575 | 0.039 |
| Deuteranopia (no green cones) | #284272 | 0.038 |
| Tritanopia (no blue cones) | #344852 | 0.077 |
| Achromatopsia (no color) | #444444 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423D73
#423D73
oklch(39.2% 0.089 285.7)
- #4C4800
#4C4800
oklch(39.3% 0.084 106)
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 #423D73, 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 0.064
- Dark Grey Blue #29465B ΔE 0.065
- Twilight #4E518B ΔE 0.068
- Light Navy #155084 ΔE 0.069
- Dusk #4E5481 ΔE 0.071
Use #423D73 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.