#3737B6#3737B6

#3737B6 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.8% C 0.194 H 274.5°. Best body text is #FFFFFF at 8.81:1 contrast (WCAG AA passes).

Color values

HEX	#3737B6
RGB	rgb(55, 55, 182)
HSL	hsl(240, 54%, 46%)
HSV	hsv(240, 70%, 71%)
CMYK	cmyk(69.8%, 69.8%, 0%, 28.6%)
CIE-LAB	lab(31.63, 41.17, -66.84)
CIE-LCH	lch(31.63, 78.50, 301.63°)
OKLab	oklab(42.78% 0.0152 -0.1932)
OKLCH	oklch(42.78% 0.194 274.5)
XYZ	xyz(11.3824, 6.9209, 44.9829)
Luminance	0.0692 (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

#3737B6 #B6B637

analogous

#3777B6 #3737B6 #7737B6

triadic

#3737B6 #B63737 #37B637

tetradic

#3737B6 #B63777 #B6B637 #37B677

square

#3737B6 #B63777 #B6B637 #37B677

split-complementary

#3737B6 #B67737 #77B637

monochromatic

#1B1B58 #292987 #3737B6 #5C5CCE #8B8BDC

Accessibility & contrast

On white

8.81

#3737B6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#3737B6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3737B6

8.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3737B6	#FFFFFF	#000000	##FFFFFF
##3737B6	1.00	8.81	2.38	8.81
#FFFFFF	8.81	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050BA

Deuteranopia (green-blind)

#0044B4

Tritanopia (blue-blind)

#005A72

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3737b6;
/* rgb */ color: rgb(55, 55, 182);
/* oklch */ color: oklch(42.8% 0.194 274.5);

Tailwind

colors: {
  custom: {
    50: '#806fcd',
    500: '#3737b6',
    950: '#000000',
  },
}

SCSS

$custom: #3737b6;
$custom-light: #806fcd;
$custom-dark: #000000;

JSON

{
  "hex": "#3737b6",
  "rgb": {
    "r": 55,
    "g": 55,
    "b": 182
  },
  "hsl": {
    "h": 240,
    "s": 53.586,
    "l": 46.471
  },
  "oklch": {
    "l": 0.42781,
    "c": 0.19378,
    "h": 274.5
  },
  "luminance": 0.06922
}

Semantic roles & 50–950 ramp

primary

#3737B6

secondary

#C6C682

accent

#DD4BDD

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3737B6

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

Preview Lab → · Contrast checker → · Palette generator →