#3737B2#3737B2

#3737B2 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.4% C 0.189 H 274.8°. Best body text is #FFFFFF at 8.93:1 contrast (WCAG AA passes).

Color values

HEX	#3737B2
RGB	rgb(55, 55, 178)
HSL	hsl(240, 53%, 46%)
HSV	hsv(240, 69%, 70%)
CMYK	cmyk(69.1%, 69.1%, 0%, 30.2%)
CIE-LAB	lab(31.25, 39.82, -65.08)
CIE-LCH	lch(31.25, 76.30, 301.46°)
OKLab	oklab(42.4% 0.0158 -0.188)
OKLCH	oklch(42.4% 0.189 274.8)
XYZ	xyz(10.9750, 6.7579, 42.8369)
Luminance	0.0676 (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

#3737B2 #B2B237

analogous

#3774B2 #3737B2 #7437B2

triadic

#3737B2 #B23737 #37B237

tetradic

#3737B2 #B23774 #B2B237 #37B274

square

#3737B2 #B23774 #B2B237 #37B274

split-complementary

#3737B2 #B27437 #74B237

monochromatic

#1A1A54 #292983 #3737B2 #5A5ACC #8989DB

Accessibility & contrast

On white

8.93

#3737B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#3737B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3737B2

8.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3737B2	#FFFFFF	#000000	##FFFFFF
##3737B2	1.00	8.93	2.35	8.93
#FFFFFF	8.93	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB6

Deuteranopia (green-blind)

#0044B0

Tritanopia (blue-blind)

#005870

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3737b2;
/* rgb */ color: rgb(55, 55, 178);
/* oklch */ color: oklch(42.4% 0.189 274.8);

Tailwind

colors: {
  custom: {
    50: '#7f6fca',
    500: '#3737b2',
    950: '#000000',
  },
}

SCSS

$custom: #3737b2;
$custom-light: #7f6fca;
$custom-dark: #000000;

JSON

{
  "hex": "#3737b2",
  "rgb": {
    "r": 55,
    "g": 55,
    "b": 178
  },
  "hsl": {
    "h": 240,
    "s": 52.79,
    "l": 45.686
  },
  "oklch": {
    "l": 0.42395,
    "c": 0.1887,
    "h": 274.8
  },
  "luminance": 0.06759
}

Semantic roles & 50–950 ramp

primary

#3737B2

secondary

#C5C580

accent

#DC4CDC

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3737B2

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

Preview Lab → · Contrast checker → · Palette generator →