#3748B7#3748B7

#3748B7 is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.8% C 0.175 H 271.0°. Best body text is #FFFFFF at 7.57:1 contrast (WCAG AA passes).

Color values

HEX	#3748B7
RGB	rgb(55, 72, 183)
HSL	hsl(232, 54%, 47%)
HSV	hsv(232, 70%, 72%)
CMYK	cmyk(69.9%, 60.7%, 0%, 28.2%)
CIE-LAB	lab(35.72, 30.90, -60.73)
CIE-LCH	lch(35.72, 68.14, 296.97°)
OKLab	oklab(45.8% 0.0032 -0.1752)
OKLCH	oklch(45.8% 0.175 271)
XYZ	xyz(12.4373, 8.8646, 45.8462)
Luminance	0.0887 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3748B7 #B7A637

analogous

#3788B7 #3748B7 #6637B7

triadic

#3748B7 #B73748 #48B737

tetradic

#3748B7 #B73788 #B7A637 #37B766

square

#3748B7 #B73788 #B7A637 #37B766

split-complementary

#3748B7 #B76637 #88B737

monochromatic

#1B2359 #293588 #3748B7 #5D6CCE #8C97DC

Accessibility & contrast

On white

7.57

#3748B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#3748B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3748B7

7.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3748B7	#FFFFFF	#000000	##FFFFFF
##3748B7	1.00	7.57	2.77	7.57
#FFFFFF	7.57	1.00	21.00	1.00
#000000	2.77	21.00	1.00	21.00
##FFFFFF	7.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005ABB

Deuteranopia (green-blind)

#004EB5

Tritanopia (blue-blind)

#006478

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #3748b7;
/* rgb */ color: rgb(55, 72, 183);
/* oklch */ color: oklch(45.8% 0.175 271.0);

Tailwind

colors: {
  custom: {
    50: '#7e7acd',
    500: '#3748b7',
    950: '#000000',
  },
}

SCSS

$custom: #3748b7;
$custom-light: #7e7acd;
$custom-dark: #000000;

JSON

{
  "hex": "#3748b7",
  "rgb": {
    "r": 55,
    "g": 72,
    "b": 183
  },
  "hsl": {
    "h": 232.031,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.458,
    "c": 0.1752,
    "h": 271
  },
  "luminance": 0.08866
}

Semantic roles & 50–950 ramp

primary

#3748B7

secondary

#C7BE83

accent

#CA4BDD

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #3748B7

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

Preview Lab → · Contrast checker → · Palette generator →