#4237CC#4237CC

#4237CC is a mid, highly saturated blue. Relative luminance 0.083; OKLCH L 45.7% C 0.218 H 276.6°. Best body text is #FFFFFF at 7.92:1 contrast (WCAG AA passes).

Color values

HEX	#4237CC
RGB	rgb(66, 55, 204)
HSL	hsl(244, 59%, 51%)
HSV	hsv(244, 73%, 80%)
CMYK	cmyk(67.6%, 73%, 0%, 20%)
CIE-LAB	lab(34.50, 49.56, -75.01)
CIE-LCH	lch(34.50, 89.90, 303.45°)
OKLab	oklab(45.67% 0.0252 -0.2167)
OKLCH	oklch(45.67% 0.218 276.6)
XYZ	xyz(14.5085, 8.2490, 57.9427)
Luminance	0.0825 (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

#4237CC #C1CC37

analogous

#3776CC #4237CC #8D37CC

triadic

#4237CC #CC4237 #37CC42

tetradic

#4237CC #CC3776 #C1CC37 #37CC8D

square

#4237CC #CC3776 #C1CC37 #37CC8D

split-complementary

#4237CC #CC8D37 #76CC37

monochromatic

#221C6D #31289E #4237CC #7068D8 #9E99E5

Accessibility & contrast

On white

7.92

#4237CC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#4237CC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4237CC

7.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4237CC	#FFFFFF	#000000	##FFFFFF
##4237CC	1.00	7.92	2.65	7.92
#FFFFFF	7.92	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057D0

Deuteranopia (green-blind)

#004BC9

Tritanopia (blue-blind)

#00617E

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #4237cc;
/* rgb */ color: rgb(66, 55, 204);
/* oklch */ color: oklch(45.7% 0.218 276.6);

Tailwind

colors: {
  custom: {
    50: '#8970dd',
    500: '#4237cc',
    950: '#000000',
  },
}

SCSS

$custom: #4237cc;
$custom-light: #8970dd;
$custom-dark: #000000;

JSON

{
  "hex": "#4237cc",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 204
  },
  "hsl": {
    "h": 244.43,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.45666,
    "c": 0.2182,
    "h": 276.6
  },
  "luminance": 0.0825
}

Semantic roles & 50–950 ramp

primary

#4237CC

secondary

#CCD08E

accent

#E345D7

background

#F9F6FD

surface

#F1ECFB

border

#CBC7D4

text

#0D0815

muted

#7E7B83

Preview Lab

Preview with #4237CC

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

Preview Lab → · Contrast checker → · Palette generator →