#3637CB#3637CB

#3637CB is a dark, highly saturated blue. Relative luminance 0.078; OKLCH L 44.8% C 0.220 H 272.8°. Best body text is #FFFFFF at 8.19:1 contrast (WCAG AA passes).

Color values

HEX	#3637CB
RGB	rgb(54, 55, 203)
HSL	hsl(240, 59%, 50%)
HSV	hsv(240, 73%, 80%)
CMYK	cmyk(73.4%, 72.9%, 0%, 20.4%)
CIE-LAB	lab(33.62, 48.05, -75.90)
CIE-LCH	lch(33.62, 89.83, 302.33°)
OKLab	oklab(44.81% 0.0108 -0.2196)
OKLCH	oklch(44.81% 0.22 272.8)
XYZ	xyz(13.6634, 7.8270, 57.2790)
Luminance	0.0783 (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

#3637CB #CBCA36

analogous

#3682CB #3637CB #7F36CB

triadic

#3637CB #CB3637 #37CB36

tetradic

#3637CB #CB3682 #CBCA36 #36CB7F

square

#3637CB #CB3682 #CBCA36 #36CB7F

split-complementary

#3637CB #CB7F36 #82CB36

monochromatic

#1C1C6B #28299C #3637CB #6767D8 #9798E4

Accessibility & contrast

On white

8.19

#3637CB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#3637CB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3637CB

8.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3637CB	#FFFFFF	#000000	##FFFFFF
##3637CB	1.00	8.19	2.57	8.19
#FFFFFF	8.19	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056CF

Deuteranopia (green-blind)

#0048C8

Tritanopia (blue-blind)

#00617E

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3637cb;
/* rgb */ color: rgb(54, 55, 203);
/* oklch */ color: oklch(44.8% 0.220 272.8);

Tailwind

colors: {
  custom: {
    50: '#846fdc',
    500: '#3637cb',
    950: '#000000',
  },
}

SCSS

$custom: #3637cb;
$custom-light: #846fdc;
$custom-dark: #000000;

JSON

{
  "hex": "#3637cb",
  "rgb": {
    "r": 54,
    "g": 55,
    "b": 203
  },
  "hsl": {
    "h": 239.597,
    "s": 58.893,
    "l": 50.392
  },
  "oklch": {
    "l": 0.4481,
    "c": 0.21988,
    "h": 272.8
  },
  "luminance": 0.07828
}

Semantic roles & 50–950 ramp

primary

#3637CB

secondary

#D0CF8D

accent

#E146E2

background

#F8F6FD

surface

#F0ECFB

border

#CBC7D4

text

#0D0715

muted

#7D7A83

Preview Lab

Preview with #3637CB

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

Preview Lab → · Contrast checker → · Palette generator →