#3738B9#3738B9

#3738B9 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 43.2% C 0.196 H 274.1°. Best body text is #FFFFFF at 8.65:1 contrast (WCAG AA passes).

Color values

HEX	#3738B9
RGB	rgb(55, 56, 185)
HSL	hsl(240, 54%, 47%)
HSV	hsv(240, 70%, 73%)
CMYK	cmyk(70.3%, 69.7%, 0%, 27.5%)
CIE-LAB	lab(32.13, 41.58, -67.79)
CIE-LCH	lch(32.13, 79.53, 301.53°)
OKLab	oklab(43.23% 0.0142 -0.196)
OKLCH	oklch(43.23% 0.196 274.1)
XYZ	xyz(11.7438, 7.1422, 46.6492)
Luminance	0.0714 (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

#3738B9 #B9B837

analogous

#3779B9 #3738B9 #7737B9

triadic

#3738B9 #B93738 #38B937

tetradic

#3738B9 #B93779 #B9B837 #37B977

square

#3738B9 #B93779 #B9B837 #37B977

split-complementary

#3738B9 #B97737 #79B937

monochromatic

#1B1B5B #292A8A #3738B9 #5E5FCF #8D8EDD

Accessibility & contrast

On white

8.65

#3738B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#3738B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3738B9

8.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3738B9	#FFFFFF	#000000	##FFFFFF
##3738B9	1.00	8.65	2.43	8.65
#FFFFFF	8.65	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BD

Deuteranopia (green-blind)

#0045B7

Tritanopia (blue-blind)

#005B74

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3738b9;
/* rgb */ color: rgb(55, 56, 185);
/* oklch */ color: oklch(43.2% 0.196 274.1);

Tailwind

colors: {
  custom: {
    50: '#806fcf',
    500: '#3738b9',
    950: '#000000',
  },
}

SCSS

$custom: #3738b9;
$custom-light: #806fcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3738b9",
  "rgb": {
    "r": 55,
    "g": 56,
    "b": 185
  },
  "hsl": {
    "h": 239.538,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.43229,
    "c": 0.19647,
    "h": 274.1
  },
  "luminance": 0.07143
}

Semantic roles & 50–950 ramp

primary

#3738B9

secondary

#C8C784

accent

#DC4ADE

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3738B9

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

Preview Lab → · Contrast checker → · Palette generator →