#3748B3#3748B3

#3748B3 is a mid, vivid blue. Relative luminance 0.087; OKLCH L 45.5% C 0.170 H 271.1°. Best body text is #FFFFFF at 7.66:1 contrast (WCAG AA passes).

Color values

HEX	#3748B3
RGB	rgb(55, 72, 179)
HSL	hsl(232, 53%, 46%)
HSV	hsv(232, 69%, 70%)
CMYK	cmyk(69.3%, 59.8%, 0%, 29.8%)
CIE-LAB	lab(35.40, 29.46, -58.89)
CIE-LCH	lch(35.40, 65.85, 296.58°)
OKLab	oklab(45.46% 0.0032 -0.1698)
OKLCH	oklch(45.46% 0.17 271.1)
XYZ	xyz(12.0268, 8.7005, 43.6846)
Luminance	0.0870 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3748B3 #B3A237

analogous

#3786B3 #3748B3 #6437B3

triadic

#3748B3 #B33748 #48B337

tetradic

#3748B3 #B33786 #B3A237 #37B364

square

#3748B3 #B33786 #B3A237 #37B364

split-complementary

#3748B3 #B36437 #86B337

monochromatic

#1A2255 #293584 #3748B3 #5B6ACD #8A95DB

Accessibility & contrast

On white

7.66

#3748B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#3748B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3748B3

7.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3748B3	#FFFFFF	#000000	##FFFFFF
##3748B3	1.00	7.66	2.74	7.66
#FFFFFF	7.66	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059B7

Deuteranopia (green-blind)

#004EB1

Tritanopia (blue-blind)

#006376

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3748b3;
/* rgb */ color: rgb(55, 72, 179);
/* oklch */ color: oklch(45.5% 0.170 271.1);

Tailwind

colors: {
  custom: {
    50: '#7e7acb',
    500: '#3748b3',
    950: '#000000',
  },
}

SCSS

$custom: #3748b3;
$custom-light: #7e7acb;
$custom-dark: #000000;

JSON

{
  "hex": "#3748b3",
  "rgb": {
    "r": 55,
    "g": 72,
    "b": 179
  },
  "hsl": {
    "h": 231.774,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.45462,
    "c": 0.1698,
    "h": 271.1
  },
  "luminance": 0.08702
}

Semantic roles & 50–950 ramp

primary

#3748B3

secondary

#C5BC81

accent

#C94BDC

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3748B3

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

Preview Lab → · Contrast checker → · Palette generator →