#3637B3#3637B3

#3637B3 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.4% C 0.190 H 274.3°. Best body text is #FFFFFF at 8.92:1 contrast (WCAG AA passes).

Color values

HEX	#3637B3
RGB	rgb(54, 55, 179)
HSL	hsl(240, 54%, 46%)
HSV	hsv(240, 70%, 70%)
CMYK	cmyk(69.8%, 69.3%, 0%, 29.8%)
CIE-LAB	lab(31.28, 40.04, -65.63)
CIE-LCH	lch(31.28, 76.88, 301.38°)
OKLab	oklab(42.43% 0.0144 -0.1897)
OKLCH	oklch(42.43% 0.19 274.3)
XYZ	xyz(11.0215, 6.7703, 43.3650)
Luminance	0.0677 (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

#3637B3 #B3B236

analogous

#3675B3 #3637B3 #7336B3

triadic

#3637B3 #B33637 #37B336

tetradic

#3637B3 #B33675 #B3B236 #36B373

square

#3637B3 #B33675 #B3B236 #36B373

split-complementary

#3637B3 #B37336 #75B336

monochromatic

#1A1A55 #282984 #3637B3 #595ACD #8889DB

Accessibility & contrast

On white

8.92

#3637B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#3637B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3637B3

8.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3637B3	#FFFFFF	#000000	##FFFFFF
##3637B3	1.00	8.92	2.35	8.92
#FFFFFF	8.92	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB7

Deuteranopia (green-blind)

#0044B1

Tritanopia (blue-blind)

#005971

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3637b3;
/* rgb */ color: rgb(54, 55, 179);
/* oklch */ color: oklch(42.4% 0.190 274.3);

Tailwind

colors: {
  custom: {
    50: '#7e6fcb',
    500: '#3637b3',
    950: '#000000',
  },
}

SCSS

$custom: #3637b3;
$custom-light: #7e6fcb;
$custom-dark: #000000;

JSON

{
  "hex": "#3637b3",
  "rgb": {
    "r": 54,
    "g": 55,
    "b": 179
  },
  "hsl": {
    "h": 239.52,
    "s": 53.648,
    "l": 45.686
  },
  "oklch": {
    "l": 0.42427,
    "c": 0.19022,
    "h": 274.3
  },
  "luminance": 0.06771
}

Semantic roles & 50–950 ramp

primary

#3637B3

secondary

#C5C580

accent

#DC4BDD

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3637B3

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

Preview Lab → · Contrast checker → · Palette generator →