#37539B#37539B

#37539B is a mid, vivid blue. Relative luminance 0.094; OKLCH L 45.9% C 0.122 H 265.8°. Best body text is #FFFFFF at 7.31:1 contrast (WCAG AA passes).

Color values

HEX	#37539B
RGB	rgb(55, 83, 155)
HSL	hsl(223, 48%, 41%)
HSV	hsv(223, 65%, 61%)
CMYK	cmyk(64.5%, 46.5%, 0%, 39.2%)
CIE-LAB	lab(36.68, 13.49, -42.50)
CIE-LCH	lch(36.68, 44.59, 287.61°)
OKLab	oklab(45.88% -0.0089 -0.1214)
OKLCH	oklch(45.88% 0.122 265.8)
XYZ	xyz(10.5832, 9.3643, 32.2538)
Luminance	0.0936 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37539B #9B7F37

analogous

#37859B #37539B #4D379B

triadic

#37539B #9B3753 #539B37

tetradic

#37539B #9B3785 #9B7F37 #379B4D

square

#37539B #9B3785 #9B7F37 #379B4D

split-complementary

#37539B #9B4D37 #859B37

monochromatic

#172341 #273B6E #37539B #4F6FC0 #7C94D0

Accessibility & contrast

On white

7.31

#37539B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.87

#37539B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #37539B

7.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37539B	#FFFFFF	#000000	##FFFFFF
##37539B	1.00	7.31	2.87	7.31
#FFFFFF	7.31	1.00	21.00	1.00
#000000	2.87	21.00	1.00	21.00
##FFFFFF	7.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#305B9E

Deuteranopia (green-blind)

#1F529A

Tritanopia (blue-blind)

#00636F

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #37539b;
/* rgb */ color: rgb(55, 83, 155);
/* oklch */ color: oklch(45.9% 0.122 265.8);

Tailwind

colors: {
  custom: {
    50: '#7882b9',
    500: '#37539b',
    950: '#000000',
  },
}

SCSS

$custom: #37539b;
$custom-light: #7882b9;
$custom-dark: #000000;

JSON

{
  "hex": "#37539b",
  "rgb": {
    "r": 55,
    "g": 83,
    "b": 155
  },
  "hsl": {
    "h": 223.2,
    "s": 47.619,
    "l": 41.176
  },
  "oklch": {
    "l": 0.45882,
    "c": 0.12175,
    "h": 265.8
  },
  "luminance": 0.09365
}

Semantic roles & 50–950 ramp

primary

#37539B

secondary

#BAA674

accent

#B251D7

background

#F7F7FB

surface

#EEEEF6

border

#C9C9D0

text

#0A0A11

muted

#7C7C80

Preview Lab

Preview with #37539B

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

Preview Lab → · Contrast checker → · Palette generator →