#4237B3#4237B3

#4237B3 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 43.3% C 0.188 H 279.1°. Best body text is #FFFFFF at 8.65:1 contrast (WCAG AA passes).

Color values

HEX	#4237B3
RGB	rgb(66, 55, 179)
HSL	hsl(245, 53%, 46%)
HSV	hsv(245, 69%, 70%)
CMYK	cmyk(63.1%, 69.3%, 0%, 29.8%)
CIE-LAB	lab(32.13, 41.59, -64.20)
CIE-LCH	lch(32.13, 76.49, 302.93°)
OKLab	oklab(43.26% 0.0296 -0.1851)
OKLCH	oklch(43.26% 0.188 279.1)
XYZ	xyz(11.7470, 7.1444, 43.3991)
Luminance	0.0714 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 3.26

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4237B3 #A8B337

analogous

#376AB3 #4237B3 #8037B3

triadic

#4237B3 #B34237 #37B342

tetradic

#4237B3 #B3376A #A8B337 #37B380

square

#4237B3 #B3376A #A8B337 #37B380

split-complementary

#4237B3 #B38037 #6AB337

monochromatic

#1F1A55 #312984 #4237B3 #655BCD #918ADB

Accessibility & contrast

On white

8.65

#4237B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#4237B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4237B3

8.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4237B3	#FFFFFF	#000000	##FFFFFF
##4237B3	1.00	8.65	2.43	8.65
#FFFFFF	8.65	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B7

Deuteranopia (green-blind)

#0047B1

Tritanopia (blue-blind)

#005871

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #4237b3;
/* rgb */ color: rgb(66, 55, 179);
/* oklch */ color: oklch(43.3% 0.188 279.1);

Tailwind

colors: {
  custom: {
    50: '#846fcb',
    500: '#4237b3',
    950: '#000000',
  },
}

SCSS

$custom: #4237b3;
$custom-light: #846fcb;
$custom-dark: #000000;

JSON

{
  "hex": "#4237b3",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 179
  },
  "hsl": {
    "h": 245.323,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.43264,
    "c": 0.1875,
    "h": 279.1
  },
  "luminance": 0.07145
}

Semantic roles & 50–950 ramp

primary

#4237B3

secondary

#BFC581

accent

#DC4BD0

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #4237B3

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

Preview Lab → · Contrast checker → · Palette generator →