#4237B8#4237B8

#4237B8 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.7% C 0.194 H 278.5°. Best body text is #FFFFFF at 8.50:1 contrast (WCAG AA passes).

Color values

HEX	#4237B8
RGB	rgb(66, 55, 184)
HSL	hsl(245, 54%, 47%)
HSV	hsv(245, 70%, 72%)
CMYK	cmyk(64.1%, 70.1%, 0%, 27.8%)
CIE-LAB	lab(32.59, 43.20, -66.41)
CIE-LCH	lch(32.59, 79.23, 303.04°)
OKLab	oklab(43.73% 0.0288 -0.1916)
OKLCH	oklch(43.73% 0.194 278.5)
XYZ	xyz(12.2619, 7.3503, 46.1107)
Luminance	0.0735 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 3.24

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4237B8 #ADB837

analogous

#376DB8 #4237B8 #8337B8

triadic

#4237B8 #B84237 #37B842

tetradic

#4237B8 #B8376D #ADB837 #37B883

square

#4237B8 #B8376D #ADB837 #37B883

split-complementary

#4237B8 #B88337 #6DB837

monochromatic

#201B5A #312989 #4237B8 #675DCF #938DDD

Accessibility & contrast

On white

8.50

#4237B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#4237B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4237B8

8.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4237B8	#FFFFFF	#000000	##FFFFFF
##4237B8	1.00	8.50	2.47	8.50
#FFFFFF	8.50	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BC

Deuteranopia (green-blind)

#0047B6

Tritanopia (blue-blind)

#005A73

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #4237b8;
/* rgb */ color: rgb(66, 55, 184);
/* oklch */ color: oklch(43.7% 0.194 278.5);

Tailwind

colors: {
  custom: {
    50: '#856fce',
    500: '#4237b8',
    950: '#000000',
  },
}

SCSS

$custom: #4237b8;
$custom-light: #856fce;
$custom-dark: #000000;

JSON

{
  "hex": "#4237b8",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 184
  },
  "hsl": {
    "h": 245.116,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.43732,
    "c": 0.19378,
    "h": 278.5
  },
  "luminance": 0.07351
}

Semantic roles & 50–950 ramp

primary

#4237B8

secondary

#C1C784

accent

#DD4AD1

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #4237B8

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

Preview Lab → · Contrast checker → · Palette generator →