#4237BF#4237BF

#4237BF is a dark, highly saturated blue. Relative luminance 0.077; OKLCH L 44.4% C 0.202 H 277.8°. Best body text is #FFFFFF at 8.30:1 contrast (WCAG AA passes).

Color values

HEX	#4237BF
RGB	rgb(66, 55, 191)
HSL	hsl(245, 55%, 48%)
HSV	hsv(245, 71%, 75%)
CMYK	cmyk(65.4%, 71.2%, 0%, 25.1%)
CIE-LAB	lab(33.25, 45.44, -69.47)
CIE-LCH	lch(33.25, 83.01, 303.19°)
OKLab	oklab(44.4% 0.0276 -0.2006)
OKLCH	oklch(44.4% 0.202 277.8)
XYZ	xyz(13.0139, 7.6511, 50.0711)
Luminance	0.0765 (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

#4237BF #B4BF37

analogous

#3770BF #4237BF #8637BF

triadic

#4237BF #BF4237 #37BF42

tetradic

#4237BF #BF3770 #B4BF37 #37BF86

square

#4237BF #BF3770 #B4BF37 #37BF86

split-complementary

#4237BF #BF8637 #70BF37

monochromatic

#211C60 #32298F #4237BF #6B62D2 #9791DF

Accessibility & contrast

On white

8.30

#4237BF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#4237BF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4237BF

8.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4237BF	#FFFFFF	#000000	##FFFFFF
##4237BF	1.00	8.30	2.53	8.30
#FFFFFF	8.30	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054C3

Deuteranopia (green-blind)

#0048BC

Tritanopia (blue-blind)

#005C77

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #4237bf;
/* rgb */ color: rgb(66, 55, 191);
/* oklch */ color: oklch(44.4% 0.202 277.8);

Tailwind

colors: {
  custom: {
    50: '#8670d3',
    500: '#4237bf',
    950: '#000000',
  },
}

SCSS

$custom: #4237bf;
$custom-light: #8670d3;
$custom-dark: #000000;

JSON

{
  "hex": "#4237bf",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 191
  },
  "hsl": {
    "h": 244.853,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.44399,
    "c": 0.20245,
    "h": 277.8
  },
  "luminance": 0.07652
}

Semantic roles & 50–950 ramp

primary

#4237BF

secondary

#C5CA88

accent

#DF49D3

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0D0714

muted

#7D7A83

Preview Lab

Preview with #4237BF

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

Preview Lab → · Contrast checker → · Palette generator →