#3737C7#3737C7

#3737C7 is a dark, highly saturated blue. Relative luminance 0.077; OKLCH L 44.5% C 0.215 H 273.4°. Best body text is #FFFFFF at 8.29:1 contrast (WCAG AA passes).

Color values

HEX	#3737C7
RGB	rgb(55, 55, 199)
HSL	hsl(240, 57%, 50%)
HSV	hsv(240, 72%, 78%)
CMYK	cmyk(72.4%, 72.4%, 0%, 22%)
CIE-LAB	lab(33.28, 46.83, -74.13)
CIE-LCH	lch(33.28, 87.68, 302.28°)
OKLab	oklab(44.46% 0.0126 -0.2144)
OKLCH	oklch(44.46% 0.215 273.4)
XYZ	xyz(13.2471, 7.6668, 54.8035)
Luminance	0.0767 (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

#3737C7 #C7C737

analogous

#377FC7 #3737C7 #7F37C7

triadic

#3737C7 #C73737 #37C737

tetradic

#3737C7 #C7377F #C7C737 #37C77F

square

#3737C7 #C7377F #C7C737 #37C77F

split-complementary

#3737C7 #C77F37 #7FC737

monochromatic

#1C1C67 #2A2A97 #3737C7 #6666D5 #9696E2

Accessibility & contrast

On white

8.29

#3737C7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#3737C7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3737C7

8.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3737C7	#FFFFFF	#000000	##FFFFFF
##3737C7	1.00	8.29	2.53	8.29
#FFFFFF	8.29	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055CB

Deuteranopia (green-blind)

#0047C4

Tritanopia (blue-blind)

#00607C

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3737c7;
/* rgb */ color: rgb(55, 55, 199);
/* oklch */ color: oklch(44.5% 0.215 273.4);

Tailwind

colors: {
  custom: {
    50: '#836fd9',
    500: '#3737c7',
    950: '#000000',
  },
}

SCSS

$custom: #3737c7;
$custom-light: #836fd9;
$custom-dark: #000000;

JSON

{
  "hex": "#3737c7",
  "rgb": {
    "r": 55,
    "g": 55,
    "b": 199
  },
  "hsl": {
    "h": 240,
    "s": 56.693,
    "l": 49.804
  },
  "oklch": {
    "l": 0.44463,
    "c": 0.2148,
    "h": 273.4
  },
  "luminance": 0.07668
}

Semantic roles & 50–950 ramp

primary

#3737C7

secondary

#CDCD8C

accent

#E048E0

background

#F8F6FD

surface

#F0ECFB

border

#CBC7D4

text

#0C0715

muted

#7D7A83

Preview Lab

Preview with #3737C7

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

Preview Lab → · Contrast checker → · Palette generator →