#3742B4#3742B4

#3742B4 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.4% C 0.178 H 272.5°. Best body text is #FFFFFF at 8.07:1 contrast (WCAG AA passes).

Color values

HEX	#3742B4
RGB	rgb(55, 66, 180)
HSL	hsl(235, 53%, 46%)
HSV	hsv(235, 69%, 71%)
CMYK	cmyk(69.4%, 63.3%, 0%, 29.4%)
CIE-LAB	lab(33.99, 33.67, -61.78)
CIE-LCH	lch(33.99, 70.36, 298.59°)
OKLab	oklab(44.44% 0.0078 -0.1783)
OKLCH	oklch(44.44% 0.179 272.5)
XYZ	xyz(11.7592, 8.0028, 44.0962)
Luminance	0.0800 (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

#3742B4 #B4A937

analogous

#3780B4 #3742B4 #6A37B4

triadic

#3742B4 #B43742 #42B437

tetradic

#3742B4 #B43780 #B4A937 #37B46A

square

#3742B4 #B43780 #B4A937 #37B46A

split-complementary

#3742B4 #B46A37 #80B437

monochromatic

#1A2056 #293185 #3742B4 #5B65CD #8A91DB

Accessibility & contrast

On white

8.07

#3742B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#3742B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3742B4

8.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3742B4	#FFFFFF	#000000	##FFFFFF
##3742B4	1.00	8.07	2.60	8.07
#FFFFFF	8.07	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056B8

Deuteranopia (green-blind)

#004AB2

Tritanopia (blue-blind)

#005F75

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3742b4;
/* rgb */ color: rgb(55, 66, 180);
/* oklch */ color: oklch(44.4% 0.178 272.5);

Tailwind

colors: {
  custom: {
    50: '#7e76cb',
    500: '#3742b4',
    950: '#000000',
  },
}

SCSS

$custom: #3742b4;
$custom-light: #7e76cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3742b4",
  "rgb": {
    "r": 55,
    "g": 66,
    "b": 180
  },
  "hsl": {
    "h": 234.72,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.44444,
    "c": 0.1785,
    "h": 272.5
  },
  "luminance": 0.08004
}

Semantic roles & 50–950 ramp

primary

#3742B4

secondary

#C6C081

accent

#D04BDD

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3742B4

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

Preview Lab → · Contrast checker → · Palette generator →