#4237BA#4237BA

#4237BA is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.9% C 0.196 H 278.3°. Best body text is #FFFFFF at 8.44:1 contrast (WCAG AA passes).

Color values

HEX	#4237BA
RGB	rgb(66, 55, 186)
HSL	hsl(245, 54%, 47%)
HSV	hsv(245, 70%, 73%)
CMYK	cmyk(64.5%, 70.4%, 0%, 27.1%)
CIE-LAB	lab(32.78, 43.84, -67.29)
CIE-LCH	lch(32.78, 80.31, 303.08°)
OKLab	oklab(43.92% 0.0285 -0.1942)
OKLCH	oklch(43.92% 0.196 278.3)
XYZ	xyz(12.4730, 7.4348, 47.2226)
Luminance	0.0744 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4237BA #AFBA37

analogous

#376EBA #4237BA #8337BA

triadic

#4237BA #BA4237 #37BA42

tetradic

#4237BA #BA376E #AFBA37 #37BA83

square

#4237BA #BA376E #AFBA37 #37BA83

split-complementary

#4237BA #BA8337 #6EBA37

monochromatic

#201B5C #31298B #4237BA #685FD0 #958EDE

Accessibility & contrast

On white

8.44

#4237BA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#4237BA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4237BA

8.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4237BA	#FFFFFF	#000000	##FFFFFF
##4237BA	1.00	8.44	2.49	8.44
#FFFFFF	8.44	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BE

Deuteranopia (green-blind)

#0048B8

Tritanopia (blue-blind)

#005B74

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #4237ba;
/* rgb */ color: rgb(66, 55, 186);
/* oklch */ color: oklch(43.9% 0.196 278.3);

Tailwind

colors: {
  custom: {
    50: '#856fd0',
    500: '#4237ba',
    950: '#000000',
  },
}

SCSS

$custom: #4237ba;
$custom-light: #856fd0;
$custom-dark: #000000;

JSON

{
  "hex": "#4237ba",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 186
  },
  "hsl": {
    "h": 245.038,
    "s": 54.357,
    "l": 47.255
  },
  "oklch": {
    "l": 0.43922,
    "c": 0.19626,
    "h": 278.3
  },
  "luminance": 0.07436
}

Semantic roles & 50–950 ramp

primary

#4237BA

secondary

#C2C885

accent

#DE4AD1

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #4237BA

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

Preview Lab → · Contrast checker → · Palette generator →