#4237B5#4237B5

#4237B5 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.5% C 0.190 H 278.9°. Best body text is #FFFFFF at 8.59:1 contrast (WCAG AA passes).

Color values

HEX	#4237B5
RGB	rgb(66, 55, 181)
HSL	hsl(245, 53%, 46%)
HSV	hsv(245, 70%, 71%)
CMYK	cmyk(63.5%, 69.6%, 0%, 29%)
CIE-LAB	lab(32.32, 42.23, -65.09)
CIE-LCH	lch(32.32, 77.59, 302.98°)
OKLab	oklab(43.45% 0.0293 -0.1877)
OKLCH	oklch(43.45% 0.19 278.9)
XYZ	xyz(11.9508, 7.2259, 44.4721)
Luminance	0.0723 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 3.23

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4237B5 #AAB537

analogous

#376BB5 #4237B5 #8137B5

triadic

#4237B5 #B54237 #37B542

tetradic

#4237B5 #B5376B #AAB537 #37B581

square

#4237B5 #B5376B #AAB537 #37B581

split-complementary

#4237B5 #B58137 #6BB537

monochromatic

#201A57 #312986 #4237B5 #665CCD #928BDC

Accessibility & contrast

On white

8.59

#4237B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#4237B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4237B5

8.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4237B5	#FFFFFF	#000000	##FFFFFF
##4237B5	1.00	8.59	2.45	8.59
#FFFFFF	8.59	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B9

Deuteranopia (green-blind)

#0047B3

Tritanopia (blue-blind)

#005972

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #4237b5;
/* rgb */ color: rgb(66, 55, 181);
/* oklch */ color: oklch(43.5% 0.190 278.9);

Tailwind

colors: {
  custom: {
    50: '#846fcc',
    500: '#4237b5',
    950: '#000000',
  },
}

SCSS

$custom: #4237b5;
$custom-light: #846fcc;
$custom-dark: #000000;

JSON

{
  "hex": "#4237b5",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 181
  },
  "hsl": {
    "h": 245.238,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.4345,
    "c": 0.19002,
    "h": 278.9
  },
  "luminance": 0.07227
}

Semantic roles & 50–950 ramp

primary

#4237B5

secondary

#C0C682

accent

#DD4BD0

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #4237B5

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

Preview Lab → · Contrast checker → · Palette generator →