#3737CB#3737CB

#3737CB is a dark, highly saturated blue. Relative luminance 0.079; OKLCH L 44.9% C 0.220 H 273.1°. Best body text is #FFFFFF at 8.17:1 contrast (WCAG AA passes).

Color values

HEX	#3737CB
RGB	rgb(55, 55, 203)
HSL	hsl(240, 59%, 51%)
HSV	hsv(240, 73%, 80%)
CMYK	cmyk(72.9%, 72.9%, 0%, 20.4%)
CIE-LAB	lab(33.68, 48.14, -75.80)
CIE-LCH	lch(33.68, 89.79, 302.42°)
OKLab	oklab(44.87% 0.0119 -0.2193)
OKLCH	oklch(44.87% 0.22 273.1)
XYZ	xyz(13.7176, 7.8550, 57.2816)
Luminance	0.0786 (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

#3737CB #CBCB37

analogous

#3781CB #3737CB #8137CB

triadic

#3737CB #CB3737 #37CB37

tetradic

#3737CB #CB3781 #CBCB37 #37CB81

square

#3737CB #CB3781 #CBCB37 #37CB81

split-complementary

#3737CB #CB8137 #81CB37

monochromatic

#1C1C6C #29299C #3737CB #6868D8 #9898E4

Accessibility & contrast

On white

8.17

#3737CB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#3737CB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3737CB

8.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3737CB	#FFFFFF	#000000	##FFFFFF
##3737CB	1.00	8.17	2.57	8.17
#FFFFFF	8.17	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.17	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: #3737cb;
/* rgb */ color: rgb(55, 55, 203);
/* oklch */ color: oklch(44.9% 0.220 273.1);

Tailwind

colors: {
  custom: {
    50: '#846fdc',
    500: '#3737cb',
    950: '#000000',
  },
}

SCSS

$custom: #3737cb;
$custom-light: #846fdc;
$custom-dark: #000000;

JSON

{
  "hex": "#3737cb",
  "rgb": {
    "r": 55,
    "g": 55,
    "b": 203
  },
  "hsl": {
    "h": 240,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.44867,
    "c": 0.21963,
    "h": 273.1
  },
  "luminance": 0.07856
}

Semantic roles & 50–950 ramp

primary

#3737CB

secondary

#D0D08E

accent

#E246E2

background

#F9F6FD

surface

#F1ECFB

border

#CBC7D4

text

#0D0715

muted

#7E7A83

Preview Lab

Preview with #3737CB

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

Preview Lab → · Contrast checker → · Palette generator →