#4237D9#4237D9

#4237D9 is a mid, highly saturated blue. Relative luminance 0.089; OKLCH L 47.0% C 0.234 H 275.5°. Best body text is #FFFFFF at 7.55:1 contrast (WCAG AA passes).

Color values

HEX	#4237D9
RGB	rgb(66, 55, 217)
HSL	hsl(244, 68%, 53%)
HSV	hsv(244, 75%, 85%)
CMYK	cmyk(69.6%, 74.7%, 0%, 14.9%)
CIE-LAB	lab(35.79, 53.61, -80.40)
CIE-LCH	lch(35.79, 96.63, 303.70°)
OKLab	oklab(46.97% 0.0225 -0.2324)
OKLCH	oklch(46.97% 0.234 275.5)
XYZ	xyz(16.1332, 8.8989, 66.4996)
Luminance	0.0890 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blurple

#5539CC

ΔE00 2.54

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4237D9 #CED937

analogous

#377DD9 #4237D9 #9337D9

triadic

#4237D9 #D94237 #37D942

tetradic

#4237D9 #D9377D #CED937 #37D993

square

#4237D9 #D9377D #CED937 #37D993

split-complementary

#4237D9 #D99337 #7DD937

monochromatic

#1F187E #2B22B1 #4237D9 #736AE3 #A39EED

Accessibility & contrast

On white

7.55

#4237D9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#4237D9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4237D9

7.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4237D9	#FFFFFF	#000000	##FFFFFF
##4237D9	1.00	7.55	2.78	7.55
#FFFFFF	7.55	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BDE

Deuteranopia (green-blind)

#004DD6

Tritanopia (blue-blind)

#006686

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #4237d9;
/* rgb */ color: rgb(66, 55, 217);
/* oklch */ color: oklch(47.0% 0.234 275.5);

Tailwind

colors: {
  custom: {
    50: '#8b71e6',
    500: '#4237d9',
    950: '#000000',
  },
}

SCSS

$custom: #4237d9;
$custom-light: #8b71e6;
$custom-dark: #000000;

JSON

{
  "hex": "#4237d9",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 217
  },
  "hsl": {
    "h": 244.074,
    "s": 68.067,
    "l": 53.333
  },
  "oklch": {
    "l": 0.46967,
    "c": 0.23353,
    "h": 275.5
  },
  "luminance": 0.089
}

Semantic roles & 50–950 ramp

primary

#4237D9

secondary

#D4D993

accent

#EB3DDF

background

#F9F6FE

surface

#F2ECFD

border

#CCC7D5

text

#0E0816

muted

#7E7B84

Preview Lab

Preview with #4237D9

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

Preview Lab → · Contrast checker → · Palette generator →