#3637B8#3637B8

#3637B8 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.9% C 0.197 H 274.0°. Best body text is #FFFFFF at 8.77:1 contrast (WCAG AA passes).

Color values

HEX	#3637B8
RGB	rgb(54, 55, 184)
HSL	hsl(240, 55%, 47%)
HSV	hsv(240, 71%, 72%)
CMYK	cmyk(70.7%, 70.1%, 0%, 27.8%)
CIE-LAB	lab(31.75, 41.73, -67.82)
CIE-LCH	lch(31.75, 79.63, 301.60°)
OKLab	oklab(42.91% 0.0137 -0.1961)
OKLCH	oklch(42.91% 0.197 274)
XYZ	xyz(11.5364, 6.9762, 46.0767)
Luminance	0.0698 (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

#3637B8 #B8B736

analogous

#3678B8 #3637B8 #7636B8

triadic

#3637B8 #B83637 #37B836

tetradic

#3637B8 #B83678 #B8B736 #36B876

square

#3637B8 #B83678 #B8B736 #36B876

split-complementary

#3637B8 #B87636 #78B836

monochromatic

#1A1B59 #282989 #3637B8 #5C5DCF #8B8CDD

Accessibility & contrast

On white

8.77

#3637B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#3637B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3637B8

8.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3637B8	#FFFFFF	#000000	##FFFFFF
##3637B8	1.00	8.77	2.40	8.77
#FFFFFF	8.77	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051BC

Deuteranopia (green-blind)

#0045B6

Tritanopia (blue-blind)

#005A73

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3637b8;
/* rgb */ color: rgb(54, 55, 184);
/* oklch */ color: oklch(42.9% 0.197 274.0);

Tailwind

colors: {
  custom: {
    50: '#806fce',
    500: '#3637b8',
    950: '#000000',
  },
}

SCSS

$custom: #3637b8;
$custom-light: #806fce;
$custom-dark: #000000;

JSON

{
  "hex": "#3637b8",
  "rgb": {
    "r": 54,
    "g": 55,
    "b": 184
  },
  "hsl": {
    "h": 239.538,
    "s": 54.622,
    "l": 46.667
  },
  "oklch": {
    "l": 0.42913,
    "c": 0.19654,
    "h": 274
  },
  "luminance": 0.06977
}

Semantic roles & 50–950 ramp

primary

#3637B8

secondary

#C7C782

accent

#DD4ADE

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3637B8

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

Preview Lab → · Contrast checker → · Palette generator →