#3738AB#3738AB

#3738AB is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.9% C 0.179 H 275.1°. Best body text is #FFFFFF at 9.07:1 contrast (WCAG AA passes).

Color values

HEX	#3738AB
RGB	rgb(55, 56, 171)
HSL	hsl(239, 51%, 44%)
HSV	hsv(239, 68%, 67%)
CMYK	cmyk(67.8%, 67.3%, 0%, 32.9%)
CIE-LAB	lab(30.83, 36.82, -61.59)
CIE-LCH	lch(30.83, 71.76, 300.87°)
OKLab	oklab(41.9% 0.0159 -0.1778)
OKLCH	oklch(41.9% 0.179 275.1)
XYZ	xyz(10.3380, 6.5799, 39.2454)
Luminance	0.0658 (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

#3738AB #ABAA37

analogous

#3772AB #3738AB #7037AB

triadic

#3738AB #AB3738 #38AB37

tetradic

#3738AB #AB3772 #ABAA37 #37AB70

square

#3738AB #AB3772 #ABAA37 #37AB70

split-complementary

#3738AB #AB7037 #72AB37

monochromatic

#191A4E #28297D #3738AB #5657C9 #8585D8

Accessibility & contrast

On white

9.07

#3738AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#3738AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3738AB

9.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3738AB	#FFFFFF	#000000	##FFFFFF
##3738AB	1.00	9.07	2.32	9.07
#FFFFFF	9.07	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EAF

Deuteranopia (green-blind)

#0043A9

Tritanopia (blue-blind)

#00566C

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3738ab;
/* rgb */ color: rgb(55, 56, 171);
/* oklch */ color: oklch(41.9% 0.179 275.1);

Tailwind

colors: {
  custom: {
    50: '#7d6fc5',
    500: '#3738ab',
    950: '#000000',
  },
}

SCSS

$custom: #3738ab;
$custom-light: #7d6fc5;
$custom-dark: #000000;

JSON

{
  "hex": "#3738ab",
  "rgb": {
    "r": 55,
    "g": 56,
    "b": 171
  },
  "hsl": {
    "h": 239.483,
    "s": 51.327,
    "l": 44.314
  },
  "oklch": {
    "l": 0.41896,
    "c": 0.17853,
    "h": 275.1
  },
  "luminance": 0.06581
}

Semantic roles & 50–950 ramp

primary

#3738AB

secondary

#C1C17C

accent

#DA4DDB

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3738AB

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

Preview Lab → · Contrast checker → · Palette generator →