#3741B5#3741B5

#3741B5 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.4% C 0.181 H 272.7°. Best body text is #FFFFFF at 8.12:1 contrast (WCAG AA passes).

Color values

HEX	#3741B5
RGB	rgb(55, 65, 181)
HSL	hsl(235, 53%, 46%)
HSV	hsv(235, 70%, 71%)
CMYK	cmyk(69.6%, 64.1%, 0%, 29%)
CIE-LAB	lab(33.83, 34.66, -62.63)
CIE-LCH	lch(33.83, 71.58, 298.96°)
OKLab	oklab(44.36% 0.0085 -0.1808)
OKLCH	oklch(44.36% 0.181 272.7)
XYZ	xyz(11.8035, 7.9279, 44.6153)
Luminance	0.0793 (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

#3741B5 #B5AB37

analogous

#3780B5 #3741B5 #6C37B5

triadic

#3741B5 #B53741 #41B537

tetradic

#3741B5 #B53780 #B5AB37 #37B56C

square

#3741B5 #B53780 #B5AB37 #37B56C

split-complementary

#3741B5 #B56C37 #80B537

monochromatic

#1A1F57 #293086 #3741B5 #5C65CD #8B91DC

Accessibility & contrast

On white

8.12

#3741B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#3741B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3741B5

8.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3741B5	#FFFFFF	#000000	##FFFFFF
##3741B5	1.00	8.12	2.59	8.12
#FFFFFF	8.12	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B9

Deuteranopia (green-blind)

#004AB3

Tritanopia (blue-blind)

#005F75

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3741b5;
/* rgb */ color: rgb(55, 65, 181);
/* oklch */ color: oklch(44.4% 0.181 272.7);

Tailwind

colors: {
  custom: {
    50: '#7f75cc',
    500: '#3741b5',
    950: '#000000',
  },
}

SCSS

$custom: #3741b5;
$custom-light: #7f75cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3741b5",
  "rgb": {
    "r": 55,
    "g": 65,
    "b": 181
  },
  "hsl": {
    "h": 235.238,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.44356,
    "c": 0.18102,
    "h": 272.7
  },
  "luminance": 0.07929
}

Semantic roles & 50–950 ramp

primary

#3741B5

secondary

#C6C182

accent

#D14BDD

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3741B5

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

Preview Lab → · Contrast checker → · Palette generator →