#3742CA#3742CA

#3742CA is a mid, highly saturated blue. Relative luminance 0.090; OKLCH L 46.5% C 0.207 H 271.7°. Best body text is #FFFFFF at 7.51:1 contrast (WCAG AA passes).

Color values

HEX	#3742CA
RGB	rgb(55, 66, 202)
HSL	hsl(236, 58%, 50%)
HSV	hsv(236, 73%, 79%)
CMYK	cmyk(72.8%, 67.3%, 0%, 20.8%)
CIE-LAB	lab(35.93, 41.36, -71.51)
CIE-LCH	lch(35.93, 82.61, 300.04°)
OKLab	oklab(46.46% 0.0062 -0.2068)
OKLCH	oklch(46.46% 0.207 271.7)
XYZ	xyz(14.1808, 8.9715, 56.8500)
Luminance	0.0897 (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

#3742CA #CABF37

analogous

#378CCA #3742CA #7537CA

triadic

#3742CA #CA3742 #42CA37

tetradic

#3742CA #CA378C #CABF37 #37CA75

square

#3742CA #CA378C #CABF37 #37CA75

split-complementary

#3742CA #CA7537 #8CCA37

monochromatic

#1C226A #29329B #3742CA #6770D7 #989DE4

Accessibility & contrast

On white

7.51

#3742CA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#3742CA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3742CA

7.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3742CA	#FFFFFF	#000000	##FFFFFF
##3742CA	1.00	7.51	2.79	7.51
#FFFFFF	7.51	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BCE

Deuteranopia (green-blind)

#004EC7

Tritanopia (blue-blind)

#006780

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #3742ca;
/* rgb */ color: rgb(55, 66, 202);
/* oklch */ color: oklch(46.5% 0.207 271.7);

Tailwind

colors: {
  custom: {
    50: '#8377db',
    500: '#3742ca',
    950: '#000000',
  },
}

SCSS

$custom: #3742ca;
$custom-light: #8377db;
$custom-dark: #000000;

JSON

{
  "hex": "#3742ca",
  "rgb": {
    "r": 55,
    "g": 66,
    "b": 202
  },
  "hsl": {
    "h": 235.51,
    "s": 58.103,
    "l": 50.392
  },
  "oklch": {
    "l": 0.46456,
    "c": 0.20691,
    "h": 271.7
  },
  "luminance": 0.08973
}

Semantic roles & 50–950 ramp

primary

#3742CA

secondary

#CFCA8E

accent

#D646E1

background

#F8F7FD

surface

#F0EDFB

border

#CBC8D4

text

#0C0815

muted

#7D7B83

Preview Lab

Preview with #3742CA

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

Preview Lab → · Contrast checker → · Palette generator →