#3638BB#3638BB

#3638BB is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.4% C 0.199 H 273.7°. Best body text is #FFFFFF at 8.61:1 contrast (WCAG AA passes).

Color values

HEX	#3638BB
RGB	rgb(54, 56, 187)
HSL	hsl(239, 55%, 47%)
HSV	hsv(239, 71%, 73%)
CMYK	cmyk(71.1%, 70.1%, 0%, 26.7%)
CIE-LAB	lab(32.26, 42.15, -68.77)
CIE-LCH	lch(32.26, 80.66, 301.50°)
OKLab	oklab(43.36% 0.0127 -0.1988)
OKLCH	oklch(43.36% 0.199 273.7)
XYZ	xyz(11.9021, 7.1993, 47.7664)
Luminance	0.0720 (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

#3638BB #BBB936

analogous

#367ABB #3638BB #7736BB

triadic

#3638BB #BB3638 #38BB36

tetradic

#3638BB #BB367A #BBB936 #36BB77

square

#3638BB #BB367A #BBB936 #36BB77

split-complementary

#3638BB #BB7736 #7ABB36

monochromatic

#1B1C5C #282A8C #3638BB #5E5FD0 #8D8EDE

Accessibility & contrast

On white

8.61

#3638BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#3638BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3638BB

8.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3638BB	#FFFFFF	#000000	##FFFFFF
##3638BB	1.00	8.61	2.44	8.61
#FFFFFF	8.61	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BF

Deuteranopia (green-blind)

#0046B9

Tritanopia (blue-blind)

#005C75

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3638bb;
/* rgb */ color: rgb(54, 56, 187);
/* oklch */ color: oklch(43.4% 0.199 273.7);

Tailwind

colors: {
  custom: {
    50: '#806fd1',
    500: '#3638bb',
    950: '#000000',
  },
}

SCSS

$custom: #3638bb;
$custom-light: #806fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3638bb",
  "rgb": {
    "r": 54,
    "g": 56,
    "b": 187
  },
  "hsl": {
    "h": 239.098,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.43362,
    "c": 0.19924,
    "h": 273.7
  },
  "luminance": 0.072
}

Semantic roles & 50–950 ramp

primary

#3638BB

secondary

#C9C884

accent

#DC49DF

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3638BB

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

Preview Lab → · Contrast checker → · Palette generator →