#3637BB#3637BB

#3637BB is a dark, highly saturated blue. Relative luminance 0.071; OKLCH L 43.2% C 0.200 H 273.8°. Best body text is #FFFFFF at 8.67:1 contrast (WCAG AA passes).

Color values

HEX	#3637BB
RGB	rgb(54, 55, 187)
HSL	hsl(240, 55%, 47%)
HSV	hsv(240, 71%, 73%)
CMYK	cmyk(71.1%, 70.6%, 0%, 26.7%)
CIE-LAB	lab(32.04, 42.74, -69.12)
CIE-LCH	lch(32.04, 81.27, 301.73°)
OKLab	oklab(43.21% 0.0133 -0.1999)
OKLCH	oklch(43.21% 0.2 273.8)
XYZ	xyz(11.8542, 7.1033, 47.7504)
Luminance	0.0711 (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

#3637BB #BBBA36

analogous

#3679BB #3637BB #7836BB

triadic

#3637BB #BB3637 #37BB36

tetradic

#3637BB #BB3679 #BBBA36 #36BB78

square

#3637BB #BB3679 #BBBA36 #36BB78

split-complementary

#3637BB #BB7836 #79BB36

monochromatic

#1B1B5C #28298C #3637BB #5E5FD0 #8D8EDE

Accessibility & contrast

On white

8.67

#3637BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#3637BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3637BB

8.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3637BB	#FFFFFF	#000000	##FFFFFF
##3637BB	1.00	8.67	2.42	8.67
#FFFFFF	8.67	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BF

Deuteranopia (green-blind)

#0045B9

Tritanopia (blue-blind)

#005C75

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3637bb;
/* rgb */ color: rgb(54, 55, 187);
/* oklch */ color: oklch(43.2% 0.200 273.8);

Tailwind

colors: {
  custom: {
    50: '#806fd1',
    500: '#3637bb',
    950: '#000000',
  },
}

SCSS

$custom: #3637bb;
$custom-light: #806fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3637bb",
  "rgb": {
    "r": 54,
    "g": 55,
    "b": 187
  },
  "hsl": {
    "h": 239.549,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.43207,
    "c": 0.2003,
    "h": 273.8
  },
  "luminance": 0.07105
}

Semantic roles & 50–950 ramp

primary

#3637BB

secondary

#C9C884

accent

#DD49DF

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3637BB

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

Preview Lab → · Contrast checker → · Palette generator →