#4237C9#4237C9

#4237C9 is a mid, highly saturated blue. Relative luminance 0.081; OKLCH L 45.4% C 0.215 H 276.9°. Best body text is #FFFFFF at 8.01:1 contrast (WCAG AA passes).

Color values

HEX	#4237C9
RGB	rgb(66, 55, 201)
HSL	hsl(245, 57%, 50%)
HSV	hsv(245, 73%, 79%)
CMYK	cmyk(67.2%, 72.6%, 0%, 21.2%)
CIE-LAB	lab(34.20, 48.62, -73.75)
CIE-LCH	lch(34.20, 88.33, 303.39°)
OKLab	oklab(45.37% 0.0257 -0.213)
OKLCH	oklch(45.37% 0.215 276.9)
XYZ	xyz(14.1521, 8.1064, 56.0659)
Luminance	0.0811 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4237C9 #BEC937

analogous

#3775C9 #4237C9 #8B37C9

triadic

#4237C9 #C94237 #37C942

tetradic

#4237C9 #C93775 #BEC937 #37C98B

square

#4237C9 #C93775 #BEC937 #37C98B

split-complementary

#4237C9 #C98B37 #75C937

monochromatic

#221C69 #322999 #4237C9 #7067D6 #9D97E3

Accessibility & contrast

On white

8.01

#4237C9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#4237C9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4237C9

8.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4237C9	#FFFFFF	#000000	##FFFFFF
##4237C9	1.00	8.01	2.62	8.01
#FFFFFF	8.01	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057CD

Deuteranopia (green-blind)

#004AC6

Tritanopia (blue-blind)

#00607D

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #4237c9;
/* rgb */ color: rgb(66, 55, 201);
/* oklch */ color: oklch(45.4% 0.215 276.9);

Tailwind

colors: {
  custom: {
    50: '#8870db',
    500: '#4237c9',
    950: '#000000',
  },
}

SCSS

$custom: #4237c9;
$custom-light: #8870db;
$custom-dark: #000000;

JSON

{
  "hex": "#4237c9",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 201
  },
  "hsl": {
    "h": 244.521,
    "s": 57.48,
    "l": 50.196
  },
  "oklch": {
    "l": 0.4537,
    "c": 0.2146,
    "h": 276.9
  },
  "luminance": 0.08108
}

Semantic roles & 50–950 ramp

primary

#4237C9

secondary

#CACF8D

accent

#E147D5

background

#F9F6FD

surface

#F1ECFB

border

#CBC7D4

text

#0D0815

muted

#7E7B83

Preview Lab

Preview with #4237C9

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →