#3748AC#3748AC

#3748AC is a dark, vivid blue. Relative luminance 0.084; OKLCH L 44.9% C 0.160 H 271.1°. Best body text is #FFFFFF at 7.82:1 contrast (WCAG AA passes).

Color values

HEX	#3748AC
RGB	rgb(55, 72, 172)
HSL	hsl(231, 52%, 45%)
HSV	hsv(231, 68%, 67%)
CMYK	cmyk(68%, 58.1%, 0%, 32.5%)
CIE-LAB	lab(34.85, 26.94, -55.62)
CIE-LCH	lch(34.85, 61.80, 295.84°)
OKLab	oklab(44.88% 0.0032 -0.1602)
OKLCH	oklch(44.88% 0.16 271.1)
XYZ	xyz(11.3368, 8.4244, 40.0504)
Luminance	0.0843 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3748AC #AC9B37

analogous

#3783AC #3748AC #6137AC

triadic

#3748AC #AC3748 #48AC37

tetradic

#3748AC #AC3783 #AC9B37 #37AC61

square

#3748AC #AC3783 #AC9B37 #37AC61

split-complementary

#3748AC #AC6137 #83AC37

monochromatic

#19214F #28357E #3748AC #5768C9 #8591D8

Accessibility & contrast

On white

7.82

#3748AC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#3748AC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3748AC

7.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3748AC	#FFFFFF	#000000	##FFFFFF
##3748AC	1.00	7.82	2.69	7.82
#FFFFFF	7.82	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057AF

Deuteranopia (green-blind)

#004DAA

Tritanopia (blue-blind)

#006073

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3748ac;
/* rgb */ color: rgb(55, 72, 172);
/* oklch */ color: oklch(44.9% 0.160 271.1);

Tailwind

colors: {
  custom: {
    50: '#7c7ac5',
    500: '#3748ac',
    950: '#000000',
  },
}

SCSS

$custom: #3748ac;
$custom-light: #7c7ac5;
$custom-dark: #000000;

JSON

{
  "hex": "#3748ac",
  "rgb": {
    "r": 55,
    "g": 72,
    "b": 172
  },
  "hsl": {
    "h": 231.282,
    "s": 51.542,
    "l": 44.51
  },
  "oklch": {
    "l": 0.44881,
    "c": 0.16021,
    "h": 271.1
  },
  "luminance": 0.08426
}

Semantic roles & 50–950 ramp

primary

#3748AC

secondary

#C2B87D

accent

#C64DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3748AC

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

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