#3738CA#3738CA

#3738CA is a dark, highly saturated blue. Relative luminance 0.079; OKLCH L 44.9% C 0.217 H 273.1°. Best body text is #FFFFFF at 8.14:1 contrast (WCAG AA passes).

Color values

HEX	#3738CA
RGB	rgb(55, 56, 202)
HSL	hsl(240, 58%, 50%)
HSV	hsv(240, 73%, 79%)
CMYK	cmyk(72.8%, 72.3%, 0%, 20.8%)
CIE-LAB	lab(33.78, 47.25, -75.05)
CIE-LCH	lch(33.78, 88.68, 302.19°)
OKLab	oklab(44.91% 0.0116 -0.2171)
OKLCH	oklch(44.91% 0.217 273.1)
XYZ	xyz(13.6468, 7.9035, 56.6720)
Luminance	0.0790 (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

#3738CA #CAC937

analogous

#3781CA #3738CA #7F37CA

triadic

#3738CA #CA3738 #38CA37

tetradic

#3738CA #CA3781 #CAC937 #37CA7F

square

#3738CA #CA3781 #CAC937 #37CA7F

split-complementary

#3738CA #CA7F37 #81CA37

monochromatic

#1C1D6A #292A9B #3738CA #6768D7 #9898E4

Accessibility & contrast

On white

8.14

#3738CA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#3738CA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3738CA

8.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3738CA	#FFFFFF	#000000	##FFFFFF
##3738CA	1.00	8.14	2.58	8.14
#FFFFFF	8.14	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056CE

Deuteranopia (green-blind)

#0048C7

Tritanopia (blue-blind)

#00627E

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3738ca;
/* rgb */ color: rgb(55, 56, 202);
/* oklch */ color: oklch(44.9% 0.217 273.1);

Tailwind

colors: {
  custom: {
    50: '#8470db',
    500: '#3738ca',
    950: '#000000',
  },
}

SCSS

$custom: #3738ca;
$custom-light: #8470db;
$custom-dark: #000000;

JSON

{
  "hex": "#3738ca",
  "rgb": {
    "r": 55,
    "g": 56,
    "b": 202
  },
  "hsl": {
    "h": 239.592,
    "s": 58.103,
    "l": 50.392
  },
  "oklch": {
    "l": 0.4491,
    "c": 0.21744,
    "h": 273.1
  },
  "luminance": 0.07905
}

Semantic roles & 50–950 ramp

primary

#3738CA

secondary

#CFCF8E

accent

#E046E1

background

#F8F6FD

surface

#F0ECFB

border

#CBC7D4

text

#0D0715

muted

#7D7A83

Preview Lab

Preview with #3738CA

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

Preview Lab → · Contrast checker → · Palette generator →