#3637B9#3637B9

#3637B9 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 43.0% C 0.198 H 273.9°. Best body text is #FFFFFF at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#3637B9
RGB	rgb(54, 55, 185)
HSL	hsl(240, 55%, 47%)
HSV	hsv(240, 71%, 73%)
CMYK	cmyk(70.8%, 70.3%, 0%, 27.5%)
CIE-LAB	lab(31.85, 42.07, -68.26)
CIE-LCH	lch(31.85, 80.18, 301.65°)
OKLab	oklab(43.01% 0.0136 -0.1973)
OKLCH	oklch(43.01% 0.198 273.9)
XYZ	xyz(11.6416, 7.0183, 46.6307)
Luminance	0.0702 (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

#3637B9 #B9B836

analogous

#3679B9 #3637B9 #7736B9

triadic

#3637B9 #B93637 #37B936

tetradic

#3637B9 #B93679 #B9B836 #36B977

square

#3637B9 #B93679 #B9B836 #36B977

split-complementary

#3637B9 #B97736 #79B936

monochromatic

#1A1B5A #28298A #3637B9 #5D5DD0 #8C8DDD

Accessibility & contrast

On white

8.74

#3637B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#3637B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3637B9

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3637B9	#FFFFFF	#000000	##FFFFFF
##3637B9	1.00	8.74	2.40	8.74
#FFFFFF	8.74	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051BD

Deuteranopia (green-blind)

#0045B7

Tritanopia (blue-blind)

#005B74

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3637b9;
/* rgb */ color: rgb(54, 55, 185);
/* oklch */ color: oklch(43.0% 0.198 273.9);

Tailwind

colors: {
  custom: {
    50: '#806fcf',
    500: '#3637b9',
    950: '#000000',
  },
}

SCSS

$custom: #3637b9;
$custom-light: #806fcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3637b9",
  "rgb": {
    "r": 54,
    "g": 55,
    "b": 185
  },
  "hsl": {
    "h": 239.542,
    "s": 54.812,
    "l": 46.863
  },
  "oklch": {
    "l": 0.43011,
    "c": 0.1978,
    "h": 273.9
  },
  "luminance": 0.07019
}

Semantic roles & 50–950 ramp

primary

#3637B9

secondary

#C8C783

accent

#DD4ADE

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3637B9

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

Preview Lab → · Contrast checker → · Palette generator →