#4237A4
Closest named color: Blueberry (#464196). oklch(41.9% 0.168 280.8), rgb(66, 55, 164).
Aa
White text reads best on this color (9.07:1).
About this color
#4237A4 is a dark, vivid purple. In OKLCH its lightness is 42%, its chroma 0.168 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.035 away. White text reads best on it, at 9.07:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.31:1 |
| White text | 9.07:1 |
Values
| HEX | #4237A4 |
| RGB | rgb(66, 55, 164) |
| HSL | hsl(246, 50%, 43%) |
| OKLCH | oklch(41.9% 0.168 280.8) |
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 #4237A4 | 9.07:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #4237A4 | 2.31:1 | Fails | Lc 13.7 | Not readable |
| #4237A4 text on white | 9.07:1 | AAA | Lc 90.3 | Preferred for body text |
| #4237A4 text on black | 2.31:1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E6E8FD
oklch(93.6% 0.028 281.5)
-
Step 200
200
#D2D6FD
oklch(88.5% 0.054 280.6)
-
Step 300
300
#B5BAFF
oklch(81% 0.097 280.8)
-
Step 400
400
#9092FF
oklch(70.6% 0.157 280.8)
-
Step 500
500
#7872FE
oklch(63% 0.202 280.8)
-
Step 600
600
#6456ED
oklch(55.7% 0.218 280.8)
-
Step 700
700
#5444CE
oklch(49.1% 0.203 281.1)
-
Step 800
800 (this color)
#4237A4
oklch(41.9% 0.168 280.8)
-
Step 900
900
#383384
oklch(37.6% 0.131 280.8)
-
Step 950
950
#211F4D
oklch(27% 0.082 281.3)
#4237A4 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) | #004CA7 | 0.068 |
| Deuteranopia (no green cones) | #0044A2 | 0.062 |
| Tritanopia (no blue cones) | #005368 | 0.144 |
| Achromatopsia (no color) | #484848 | 0.169 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4237A4
#4237A4
oklch(41.9% 0.168 280.8)
- #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 #4237A4, closest first.
No curated palette has a color within ΔE 0.04 of #4237A4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.035
- Sapphire #2138AB ΔE 0.045
- Dark Slate Blue #483D8B ΔE 0.046
- Indigo Blue #3A18B1 ΔE 0.056
- Majorelle Blue #3F37C9 ΔE 0.060
- Imperial Purple #480CA8 ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.063
- Chrysanthemum #560BAD ΔE 0.066
Use #4237A4 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.