#3738AC#3738AC

#3738AC is a dark, vivid blue. Relative luminance 0.066; OKLCH L 42.0% C 0.180 H 275.0°. Best body text is #FFFFFF at 9.04:1 contrast (WCAG AA passes).

Color values

HEX	#3738AC
RGB	rgb(55, 56, 172)
HSL	hsl(239, 52%, 45%)
HSV	hsv(239, 68%, 67%)
CMYK	cmyk(68%, 67.4%, 0%, 32.5%)
CIE-LAB	lab(30.92, 37.16, -62.04)
CIE-LCH	lch(30.92, 72.32, 300.92°)
OKLab	oklab(41.99% 0.0158 -0.1791)
OKLCH	oklch(41.99% 0.18 275)
XYZ	xyz(10.4337, 6.6182, 39.7493)
Luminance	0.0662 (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

#3738AC #ACAB37

analogous

#3773AC #3738AC #7137AC

triadic

#3738AC #AC3738 #38AC37

tetradic

#3738AC #AC3773 #ACAB37 #37AC71

square

#3738AC #AC3773 #ACAB37 #37AC71

split-complementary

#3738AC #AC7137 #73AC37

monochromatic

#191A4F #28297E #3738AC #5758C9 #8586D8

Accessibility & contrast

On white

9.04

#3738AC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#3738AC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3738AC

9.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3738AC	#FFFFFF	#000000	##FFFFFF
##3738AC	1.00	9.04	2.32	9.04
#FFFFFF	9.04	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EB0

Deuteranopia (green-blind)

#0043AA

Tritanopia (blue-blind)

#00576D

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3738ac;
/* rgb */ color: rgb(55, 56, 172);
/* oklch */ color: oklch(42.0% 0.180 275.0);

Tailwind

colors: {
  custom: {
    50: '#7d6fc6',
    500: '#3738ac',
    950: '#000000',
  },
}

SCSS

$custom: #3738ac;
$custom-light: #7d6fc6;
$custom-dark: #000000;

JSON

{
  "hex": "#3738ac",
  "rgb": {
    "r": 55,
    "g": 56,
    "b": 172
  },
  "hsl": {
    "h": 239.487,
    "s": 51.542,
    "l": 44.51
  },
  "oklch": {
    "l": 0.41989,
    "c": 0.17982,
    "h": 275
  },
  "luminance": 0.06619
}

Semantic roles & 50–950 ramp

primary

#3738AC

secondary

#C2C17D

accent

#DA4DDB

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3738AC

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

Preview Lab → · Contrast checker → · Palette generator →