#4237B9#4237B9

#4237B9 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.8% C 0.195 H 278.4°. Best body text is #FFFFFF at 8.47:1 contrast (WCAG AA passes).

Color values

HEX	#4237B9
RGB	rgb(66, 55, 185)
HSL	hsl(245, 54%, 47%)
HSV	hsv(245, 70%, 73%)
CMYK	cmyk(64.3%, 70.3%, 0%, 27.5%)
CIE-LAB	lab(32.68, 43.52, -66.85)
CIE-LCH	lch(32.68, 79.77, 303.06°)
OKLab	oklab(43.83% 0.0286 -0.1929)
OKLCH	oklch(43.83% 0.195 278.4)
XYZ	xyz(12.3671, 7.3924, 46.6647)
Luminance	0.0739 (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

#4237B9 #AEB937

analogous

#376DB9 #4237B9 #8337B9

triadic

#4237B9 #B94237 #37B942

tetradic

#4237B9 #B9376D #AEB937 #37B983

square

#4237B9 #B9376D #AEB937 #37B983

split-complementary

#4237B9 #B98337 #6DB937

monochromatic

#201B5B #31298A #4237B9 #685ECF #948DDD

Accessibility & contrast

On white

8.47

#4237B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#4237B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4237B9

8.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4237B9	#FFFFFF	#000000	##FFFFFF
##4237B9	1.00	8.47	2.48	8.47
#FFFFFF	8.47	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BD

Deuteranopia (green-blind)

#0048B7

Tritanopia (blue-blind)

#005A74

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #4237b9;
/* rgb */ color: rgb(66, 55, 185);
/* oklch */ color: oklch(43.8% 0.195 278.4);

Tailwind

colors: {
  custom: {
    50: '#856fcf',
    500: '#4237b9',
    950: '#000000',
  },
}

SCSS

$custom: #4237b9;
$custom-light: #856fcf;
$custom-dark: #000000;

JSON

{
  "hex": "#4237b9",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 185
  },
  "hsl": {
    "h": 245.077,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.43827,
    "c": 0.19502,
    "h": 278.4
  },
  "luminance": 0.07393
}

Semantic roles & 50–950 ramp

primary

#4237B9

secondary

#C2C884

accent

#DE4AD1

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #4237B9

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

Preview Lab → · Contrast checker → · Palette generator →