#3747AC#3747AC

#3747AC is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.7% C 0.161 H 271.4°. Best body text is #FFFFFF at 7.90:1 contrast (WCAG AA passes).

Color values

HEX	#3747AC
RGB	rgb(55, 71, 172)
HSL	hsl(232, 52%, 45%)
HSV	hsv(232, 68%, 67%)
CMYK	cmyk(68%, 58.7%, 0%, 32.5%)
CIE-LAB	lab(34.59, 27.59, -56.05)
CIE-LCH	lch(34.59, 62.47, 296.21°)
OKLab	oklab(44.69% 0.004 -0.1614)
OKLCH	oklch(44.69% 0.161 271.4)
XYZ	xyz(11.2727, 8.2962, 40.0290)
Luminance	0.0830 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3747AC #AC9C37

analogous

#3782AC #3747AC #6237AC

triadic

#3747AC #AC3747 #47AC37

tetradic

#3747AC #AC3782 #AC9C37 #37AC62

square

#3747AC #AC3782 #AC9C37 #37AC62

split-complementary

#3747AC #AC6237 #82AC37

monochromatic

#19214F #28347E #3747AC #5767C9 #8591D8

Accessibility & contrast

On white

7.90

#3747AC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#3747AC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3747AC

7.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3747AC	#FFFFFF	#000000	##FFFFFF
##3747AC	1.00	7.90	2.66	7.90
#FFFFFF	7.90	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057AF

Deuteranopia (green-blind)

#004CAA

Tritanopia (blue-blind)

#006072

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3747ac;
/* rgb */ color: rgb(55, 71, 172);
/* oklch */ color: oklch(44.7% 0.161 271.4);

Tailwind

colors: {
  custom: {
    50: '#7c7ac5',
    500: '#3747ac',
    950: '#000000',
  },
}

SCSS

$custom: #3747ac;
$custom-light: #7c7ac5;
$custom-dark: #000000;

JSON

{
  "hex": "#3747ac",
  "rgb": {
    "r": 55,
    "g": 71,
    "b": 172
  },
  "hsl": {
    "h": 231.795,
    "s": 51.542,
    "l": 44.51
  },
  "oklch": {
    "l": 0.44687,
    "c": 0.16148,
    "h": 271.4
  },
  "luminance": 0.08297
}

Semantic roles & 50–950 ramp

primary

#3747AC

secondary

#C2B87D

accent

#C84DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3747AC

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

Preview Lab → · Contrast checker → · Palette generator →