#3747B7#3747B7

#3747B7 is a mid, vivid blue. Relative luminance 0.087; OKLCH L 45.6% C 0.176 H 271.3°. Best body text is #FFFFFF at 7.64:1 contrast (WCAG AA passes).

Color values

HEX	#3747B7
RGB	rgb(55, 71, 183)
HSL	hsl(233, 54%, 47%)
HSV	hsv(233, 70%, 72%)
CMYK	cmyk(69.9%, 61.2%, 0%, 28.2%)
CIE-LAB	lab(35.47, 31.55, -61.14)
CIE-LCH	lch(35.47, 68.79, 297.29°)
OKLab	oklab(45.62% 0.004 -0.1764)
OKLCH	oklch(45.62% 0.176 271.3)
XYZ	xyz(12.3731, 8.7364, 45.8248)
Luminance	0.0874 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3747B7 #B7A737

analogous

#3787B7 #3747B7 #6737B7

triadic

#3747B7 #B73747 #47B737

tetradic

#3747B7 #B73787 #B7A737 #37B767

square

#3747B7 #B73787 #B7A737 #37B767

split-complementary

#3747B7 #B76737 #87B737

monochromatic

#1B2259 #293588 #3747B7 #5D6BCE #8C96DC

Accessibility & contrast

On white

7.64

#3747B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.75

#3747B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3747B7

7.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3747B7	#FFFFFF	#000000	##FFFFFF
##3747B7	1.00	7.64	2.75	7.64
#FFFFFF	7.64	1.00	21.00	1.00
#000000	2.75	21.00	1.00	21.00
##FFFFFF	7.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059BB

Deuteranopia (green-blind)

#004EB5

Tritanopia (blue-blind)

#006378

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3747b7;
/* rgb */ color: rgb(55, 71, 183);
/* oklch */ color: oklch(45.6% 0.176 271.3);

Tailwind

colors: {
  custom: {
    50: '#7e7acd',
    500: '#3747b7',
    950: '#000000',
  },
}

SCSS

$custom: #3747b7;
$custom-light: #7e7acd;
$custom-dark: #000000;

JSON

{
  "hex": "#3747b7",
  "rgb": {
    "r": 55,
    "g": 71,
    "b": 183
  },
  "hsl": {
    "h": 232.5,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.45615,
    "c": 0.17642,
    "h": 271.3
  },
  "luminance": 0.08738
}

Semantic roles & 50–950 ramp

primary

#3747B7

secondary

#C7BE83

accent

#CB4BDD

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #3747B7

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

Preview Lab → · Contrast checker → · Palette generator →