#3737C4#3737C4

#3737C4 is a dark, highly saturated blue. Relative luminance 0.075; OKLCH L 44.2% C 0.211 H 273.6°. Best body text is #FFFFFF at 8.38:1 contrast (WCAG AA passes).

Color values

HEX	#3737C4
RGB	rgb(55, 55, 196)
HSL	hsl(240, 56%, 49%)
HSV	hsv(240, 72%, 77%)
CMYK	cmyk(71.9%, 71.9%, 0%, 23.1%)
CIE-LAB	lab(32.98, 45.84, -72.86)
CIE-LCH	lch(32.98, 86.08, 302.18°)
OKLab	oklab(44.16% 0.0131 -0.2107)
OKLCH	oklch(44.16% 0.211 273.6)
XYZ	xyz(12.9022, 7.5288, 52.9871)
Luminance	0.0753 (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

#3737C4 #C4C437

analogous

#377EC4 #3737C4 #7E37C4

triadic

#3737C4 #C43737 #37C437

tetradic

#3737C4 #C4377E #C4C437 #37C47E

square

#3737C4 #C4377E #C4C437 #37C47E

split-complementary

#3737C4 #C47E37 #7EC437

monochromatic

#1C1C64 #2A2A94 #3737C4 #6565D4 #9494E1

Accessibility & contrast

On white

8.38

#3737C4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#3737C4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3737C4

8.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3737C4	#FFFFFF	#000000	##FFFFFF
##3737C4	1.00	8.38	2.51	8.38
#FFFFFF	8.38	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054C8

Deuteranopia (green-blind)

#0047C1

Tritanopia (blue-blind)

#005F7A

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3737c4;
/* rgb */ color: rgb(55, 55, 196);
/* oklch */ color: oklch(44.2% 0.211 273.6);

Tailwind

colors: {
  custom: {
    50: '#836fd7',
    500: '#3737c4',
    950: '#000000',
  },
}

SCSS

$custom: #3737c4;
$custom-light: #836fd7;
$custom-dark: #000000;

JSON

{
  "hex": "#3737c4",
  "rgb": {
    "r": 55,
    "g": 55,
    "b": 196
  },
  "hsl": {
    "h": 240,
    "s": 56.175,
    "l": 49.216
  },
  "oklch": {
    "l": 0.44162,
    "c": 0.21116,
    "h": 273.6
  },
  "luminance": 0.0753
}

Semantic roles & 50–950 ramp

primary

#3737C4

secondary

#CCCC8B

accent

#DF48DF

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0715

muted

#7D7A83

Preview Lab

Preview with #3737C4

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

Preview Lab → · Contrast checker → · Palette generator →