#423F90
Closest named color: Blueberry (#464196). oklch(41.7% 0.13 280.8), rgb(66, 63, 144).
Aa
White text reads best on this color (8.95:1).
About this color
#423F90 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.130 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.013 away. White text reads best on it, at 8.95:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.34:1 |
| White text | 8.95:1 |
Values
| HEX | #423F90 |
| RGB | rgb(66, 63, 144) |
| HSL | hsl(242, 39%, 41%) |
| OKLCH | oklch(41.7% 0.13 280.8) |
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 #423F90 | 8.95:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #423F90 | 2.34:1 | Fails | Lc 13.7 | Not readable |
| #423F90 text on white | 8.95:1 | AAA | Lc 90.3 | Preferred for body text |
| #423F90 text on black | 2.34:1 | Fails | Lc -12.0 | 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 800.
-
Step 50
50
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E9F9
oklch(93.7% 0.022 280.3)
-
Step 200
200
#D3D7F5
oklch(88.5% 0.041 279.5)
-
Step 300
300
#B7BCF1
oklch(81% 0.075 280.4)
-
Step 400
400
#9397EB
oklch(70.7% 0.122 280.7)
-
Step 500
500
#7A7BE4
oklch(63.1% 0.155 280.6)
-
Step 600
600
#6561D2
oklch(55.5% 0.169 281)
-
Step 700
700
#5450B6
oklch(49.1% 0.157 280.7)
-
Step 800
800 (this color)
#423F90
oklch(41.7% 0.13 280.8)
-
Step 900
900
#393975
oklch(37.7% 0.1 280.5)
-
Step 950
950
#212245
oklch(27.1% 0.064 280)
#423F90 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) | #0B4C93 | 0.058 |
| Deuteranopia (no green cones) | #00468E | 0.060 |
| Tritanopia (no blue cones) | #205161 | 0.111 |
| Achromatopsia (no color) | #494949 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423F90
#423F90
oklch(41.7% 0.13 280.8)
- #574D00
#574D00
oklch(41.7% 0.087 100.8)
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 #423F90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.013
- Dark Slate Blue #483D8B ΔE 0.013
- Cobalt #1E488F ΔE 0.046
- Twilight #4E518B ΔE 0.056
- Dusk Blue #26538D ΔE 0.061
- Sapphire #2138AB ΔE 0.065
- Light Navy #155084 ΔE 0.068
- Rebecca Purple #663399 ΔE 0.068
Use #423F90 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.