#4237B7#4237B7

#4237B7 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.6% C 0.193 H 278.6°. Best body text is #FFFFFF at 8.53:1 contrast (WCAG AA passes).

Color values

HEX	#4237B7
RGB	rgb(66, 55, 183)
HSL	hsl(245, 54%, 47%)
HSV	hsv(245, 70%, 72%)
CMYK	cmyk(63.9%, 69.9%, 0%, 28.2%)
CIE-LAB	lab(32.50, 42.88, -65.97)
CIE-LCH	lch(32.50, 78.68, 303.02°)
OKLab	oklab(43.64% 0.029 -0.1903)
OKLCH	oklch(43.64% 0.193 278.6)
XYZ	xyz(12.1575, 7.3086, 45.5606)
Luminance	0.0731 (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

#4237B7 #ACB737

analogous

#376CB7 #4237B7 #8237B7

triadic

#4237B7 #B74237 #37B742

tetradic

#4237B7 #B7376C #ACB737 #37B782

square

#4237B7 #B7376C #ACB737 #37B782

split-complementary

#4237B7 #B78237 #6CB737

monochromatic

#201B59 #312988 #4237B7 #675DCE #938CDC

Accessibility & contrast

On white

8.53

#4237B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#4237B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4237B7

8.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4237B7	#FFFFFF	#000000	##FFFFFF
##4237B7	1.00	8.53	2.46	8.53
#FFFFFF	8.53	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051BB

Deuteranopia (green-blind)

#0047B5

Tritanopia (blue-blind)

#005A73

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #4237b7;
/* rgb */ color: rgb(66, 55, 183);
/* oklch */ color: oklch(43.6% 0.193 278.6);

Tailwind

colors: {
  custom: {
    50: '#856fce',
    500: '#4237b7',
    950: '#000000',
  },
}

SCSS

$custom: #4237b7;
$custom-light: #856fce;
$custom-dark: #000000;

JSON

{
  "hex": "#4237b7",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 183
  },
  "hsl": {
    "h": 245.156,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.43638,
    "c": 0.19253,
    "h": 278.6
  },
  "luminance": 0.0731
}

Semantic roles & 50–950 ramp

primary

#4237B7

secondary

#C1C783

accent

#DD4BD1

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #4237B7

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

Preview Lab → · Contrast checker → · Palette generator →