#3747AA#3747AA

#3747AA is a dark, vivid blue. Relative luminance 0.082; OKLCH L 44.5% C 0.159 H 271.4°. Best body text is #FFFFFF at 7.94:1 contrast (WCAG AA passes).

Color values

HEX	#3747AA
RGB	rgb(55, 71, 170)
HSL	hsl(232, 51%, 44%)
HSV	hsv(232, 68%, 67%)
CMYK	cmyk(67.6%, 58.2%, 0%, 33.3%)
CIE-LAB	lab(34.44, 26.87, -55.11)
CIE-LCH	lch(34.44, 61.31, 295.99°)
OKLab	oklab(44.52% 0.004 -0.1587)
OKLCH	oklch(44.52% 0.159 271.4)
XYZ	xyz(11.0820, 8.2200, 39.0250)
Luminance	0.0822 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3747AA #AA9A37

analogous

#3781AA #3747AA #6137AA

triadic

#3747AA #AA3747 #47AA37

tetradic

#3747AA #AA3781 #AA9A37 #37AA61

square

#3747AA #AA3781 #AA9A37 #37AA61

split-complementary

#3747AA #AA6137 #81AA37

monochromatic

#19204E #28347C #3747AA #5666C8 #8490D7

Accessibility & contrast

On white

7.94

#3747AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#3747AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3747AA

7.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3747AA	#FFFFFF	#000000	##FFFFFF
##3747AA	1.00	7.94	2.64	7.94
#FFFFFF	7.94	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056AD

Deuteranopia (green-blind)

#004CA8

Tritanopia (blue-blind)

#005F71

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3747aa;
/* rgb */ color: rgb(55, 71, 170);
/* oklch */ color: oklch(44.5% 0.159 271.4);

Tailwind

colors: {
  custom: {
    50: '#7c7ac4',
    500: '#3747aa',
    950: '#000000',
  },
}

SCSS

$custom: #3747aa;
$custom-light: #7c7ac4;
$custom-dark: #000000;

JSON

{
  "hex": "#3747aa",
  "rgb": {
    "r": 55,
    "g": 71,
    "b": 170
  },
  "hsl": {
    "h": 231.652,
    "s": 51.111,
    "l": 44.118
  },
  "oklch": {
    "l": 0.44523,
    "c": 0.15872,
    "h": 271.4
  },
  "luminance": 0.08221
}

Semantic roles & 50–950 ramp

primary

#3747AA

secondary

#C1B77C

accent

#C74DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3747AA

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

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