#3748AD#3748AD

#3748AD is a dark, vivid blue. Relative luminance 0.085; OKLCH L 45.0% C 0.162 H 271.1°. Best body text is #FFFFFF at 7.80:1 contrast (WCAG AA passes).

Color values

HEX	#3748AD
RGB	rgb(55, 72, 173)
HSL	hsl(231, 52%, 45%)
HSV	hsv(231, 68%, 68%)
CMYK	cmyk(68.2%, 58.4%, 0%, 32.2%)
CIE-LAB	lab(34.93, 27.30, -56.09)
CIE-LCH	lch(34.93, 62.38, 295.95°)
OKLab	oklab(44.96% 0.0032 -0.1616)
OKLCH	oklch(44.96% 0.162 271.1)
XYZ	xyz(11.4332, 8.4630, 40.5581)
Luminance	0.0846 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3748AD #AD9C37

analogous

#3783AD #3748AD #6137AD

triadic

#3748AD #AD3748 #48AD37

tetradic

#3748AD #AD3783 #AD9C37 #37AD61

square

#3748AD #AD3783 #AD9C37 #37AD61

split-complementary

#3748AD #AD6137 #83AD37

monochromatic

#192150 #28357F #3748AD #5768CA #8692D8

Accessibility & contrast

On white

7.80

#3748AD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#3748AD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3748AD

7.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3748AD	#FFFFFF	#000000	##FFFFFF
##3748AD	1.00	7.80	2.69	7.80
#FFFFFF	7.80	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058B0

Deuteranopia (green-blind)

#004DAB

Tritanopia (blue-blind)

#006173

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3748ad;
/* rgb */ color: rgb(55, 72, 173);
/* oklch */ color: oklch(45.0% 0.162 271.1);

Tailwind

colors: {
  custom: {
    50: '#7c7ac6',
    500: '#3748ad',
    950: '#000000',
  },
}

SCSS

$custom: #3748ad;
$custom-light: #7c7ac6;
$custom-dark: #000000;

JSON

{
  "hex": "#3748ad",
  "rgb": {
    "r": 55,
    "g": 72,
    "b": 173
  },
  "hsl": {
    "h": 231.356,
    "s": 51.754,
    "l": 44.706
  },
  "oklch": {
    "l": 0.44963,
    "c": 0.16159,
    "h": 271.1
  },
  "luminance": 0.08464
}

Semantic roles & 50–950 ramp

primary

#3748AD

secondary

#C2B87D

accent

#C74DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3748AD

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

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