#3749B2#3749B2

#3749B2 is a mid, vivid blue. Relative luminance 0.088; OKLCH L 45.6% C 0.167 H 270.8°. Best body text is #FFFFFF at 7.61:1 contrast (WCAG AA passes).

Color values

HEX	#3749B2
RGB	rgb(55, 73, 178)
HSL	hsl(231, 53%, 46%)
HSV	hsv(231, 69%, 70%)
CMYK	cmyk(69.1%, 59%, 0%, 30.2%)
CIE-LAB	lab(35.58, 28.45, -58.01)
CIE-LCH	lch(35.58, 64.61, 296.13°)
OKLab	oklab(45.57% 0.0024 -0.1672)
OKLCH	oklch(45.57% 0.167 270.8)
XYZ	xyz(11.9912, 8.7905, 43.1756)
Luminance	0.0879 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3749B2 #B2A037

analogous

#3786B2 #3749B2 #6337B2

triadic

#3749B2 #B23749 #49B237

tetradic

#3749B2 #B23786 #B2A037 #37B263

square

#3749B2 #B23786 #B2A037 #37B263

split-complementary

#3749B2 #B26337 #86B237

monochromatic

#1A2354 #293683 #3749B2 #5A6BCC #8995DB

Accessibility & contrast

On white

7.61

#3749B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.76

#3749B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3749B2

7.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3749B2	#FFFFFF	#000000	##FFFFFF
##3749B2	1.00	7.61	2.76	7.61
#FFFFFF	7.61	1.00	21.00	1.00
#000000	2.76	21.00	1.00	21.00
##FFFFFF	7.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059B6

Deuteranopia (green-blind)

#004EB0

Tritanopia (blue-blind)

#006376

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #3749b2;
/* rgb */ color: rgb(55, 73, 178);
/* oklch */ color: oklch(45.6% 0.167 270.8);

Tailwind

colors: {
  custom: {
    50: '#7d7bca',
    500: '#3749b2',
    950: '#000000',
  },
}

SCSS

$custom: #3749b2;
$custom-light: #7d7bca;
$custom-dark: #000000;

JSON

{
  "hex": "#3749b2",
  "rgb": {
    "r": 55,
    "g": 73,
    "b": 178
  },
  "hsl": {
    "h": 231.22,
    "s": 52.79,
    "l": 45.686
  },
  "oklch": {
    "l": 0.45568,
    "c": 0.16719,
    "h": 270.8
  },
  "luminance": 0.08792
}

Semantic roles & 50–950 ramp

primary

#3749B2

secondary

#C5BB80

accent

#C74CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3749B2

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

Preview Lab → · Contrast checker → · Palette generator →