#423D80
Closest named color: Dark Slate Blue (#483D8B). oklch(40.1% 0.109 283.7), rgb(66, 61, 128).
Aa
White text reads best on this color (9.49:1).
About this color
#423D80 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.109 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.021 away. White text reads best on it, at 9.49:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.21:1 |
| White text | 9.49:1 |
Values
| HEX | #423D80 |
| RGB | rgb(66, 61, 128) |
| HSL | hsl(244, 35%, 37%) |
| OKLCH | oklch(40.1% 0.109 283.7) |
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 #423D80 | 9.49:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #423D80 | 2.21:1 | Fails | Lc 12.2 | Not readable |
| #423D80 text on white | 9.49:1 | AAA | Lc 91.8 | Preferred for body text |
| #423D80 text on black | 2.21:1 | Fails | Lc -10.6 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E7E8FA
oklch(93.6% 0.024 283.4)
-
Step 200
200
#D5D6F7
oklch(88.6% 0.045 284.1)
-
Step 300
300
#B9BAF4
oklch(80.8% 0.082 283.6)
-
Step 400
400
#9794EF
oklch(70.7% 0.131 284)
-
Step 500
500
#7F77EA
oklch(63.1% 0.168 283.6)
-
Step 600
600
#6A5DD8
oklch(55.7% 0.182 283.6)
-
Step 700
700
#594BBB
oklch(49% 0.169 283.9)
-
Step 800
800
#483F98
oklch(42.8% 0.14 283.3)
-
Step 900
900 (this color)
#423D80
oklch(40.1% 0.109 283.7)
-
Step 950
950
#232047
oklch(27% 0.07 284.1)
#423D80 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) | #1E4882 | 0.050 |
| Deuteranopia (no green cones) | #1B437F | 0.049 |
| Tritanopia (no blue cones) | #2D4B58 | 0.093 |
| Achromatopsia (no color) | #464646 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423D80
#423D80
oklch(40.1% 0.109 283.7)
- #504A00
#504A00
oklch(40.2% 0.085 104.3)
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 #423D80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.021
- Blueberry #464196 ΔE 0.038
- Cobalt #1E488F ΔE 0.053
- Twilight #4E518B ΔE 0.061
- Twilight Blue #0A437A ΔE 0.061
- Dusk Blue #26538D ΔE 0.066
- Light Navy #155084 ΔE 0.066
- Dusk #4E5481 ΔE 0.070
Use #423D80 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.