#3740BE#3740BE

#3740BE is a mid, vivid blue. Relative luminance 0.082; OKLCH L 45.0% C 0.194 H 272.5°. Best body text is #FFFFFF at 7.96:1 contrast (WCAG AA passes).

Color values

HEX	#3740BE
RGB	rgb(55, 64, 190)
HSL	hsl(236, 55%, 48%)
HSV	hsv(236, 71%, 75%)
CMYK	cmyk(71.1%, 66.3%, 0%, 25.5%)
CIE-LAB	lab(34.39, 38.43, -67.03)
CIE-LCH	lch(34.39, 77.27, 299.83°)
OKLab	oklab(45% 0.0085 -0.1937)
OKLCH	oklch(45% 0.194 272.5)
XYZ	xyz(12.7001, 8.1955, 49.6178)
Luminance	0.0820 (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

#3740BE #BEB537

analogous

#3783BE #3740BE #7137BE

triadic

#3740BE #BE3740 #40BE37

tetradic

#3740BE #BE3783 #BEB537 #37BE71

square

#3740BE #BE3783 #BEB537 #37BE71

split-complementary

#3740BE #BE7137 #83BE37

monochromatic

#1C205F #29308F #3740BE #6168D1 #9096DF

Accessibility & contrast

On white

7.96

#3740BE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#3740BE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3740BE

7.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3740BE	#FFFFFF	#000000	##FFFFFF
##3740BE	1.00	7.96	2.64	7.96
#FFFFFF	7.96	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057C2

Deuteranopia (green-blind)

#004BBC

Tritanopia (blue-blind)

#006179

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3740be;
/* rgb */ color: rgb(55, 64, 190);
/* oklch */ color: oklch(45.0% 0.194 272.5);

Tailwind

colors: {
  custom: {
    50: '#8175d3',
    500: '#3740be',
    950: '#000000',
  },
}

SCSS

$custom: #3740be;
$custom-light: #8175d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3740be",
  "rgb": {
    "r": 55,
    "g": 64,
    "b": 190
  },
  "hsl": {
    "h": 236,
    "s": 55.102,
    "l": 48.039
  },
  "oklch": {
    "l": 0.45004,
    "c": 0.19391,
    "h": 272.5
  },
  "luminance": 0.08197
}

Semantic roles & 50–950 ramp

primary

#3740BE

secondary

#CAC587

accent

#D449DE

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #3740BE

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

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