#3747B0#3747B0

#3747B0 is a mid, vivid blue. Relative luminance 0.085; OKLCH L 45.0% C 0.167 H 271.4°. Best body text is #FFFFFF at 7.80:1 contrast (WCAG AA passes).

Color values

HEX	#3747B0
RGB	rgb(55, 71, 176)
HSL	hsl(232, 52%, 45%)
HSV	hsv(232, 69%, 69%)
CMYK	cmyk(68.8%, 59.7%, 0%, 31%)
CIE-LAB	lab(34.91, 29.03, -57.91)
CIE-LCH	lch(34.91, 64.78, 296.62°)
OKLab	oklab(45.02% 0.004 -0.1669)
OKLCH	oklch(45.02% 0.167 271.4)
XYZ	xyz(11.6626, 8.4522, 42.0827)
Luminance	0.0845 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3747B0 #B0A037

analogous

#3783B0 #3747B0 #6337B0

triadic

#3747B0 #B03747 #47B037

tetradic

#3747B0 #B03783 #B0A037 #37B063

square

#3747B0 #B03783 #B0A037 #37B063

split-complementary

#3747B0 #B06337 #83B037

monochromatic

#1A2153 #283481 #3747B0 #5968CB #8893DA

Accessibility & contrast

On white

7.80

#3747B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#3747B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3747B0

7.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3747B0	#FFFFFF	#000000	##FFFFFF
##3747B0	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)

#0058B3

Deuteranopia (green-blind)

#004DAE

Tritanopia (blue-blind)

#006174

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3747b0;
/* rgb */ color: rgb(55, 71, 176);
/* oklch */ color: oklch(45.0% 0.167 271.4);

Tailwind

colors: {
  custom: {
    50: '#7d7ac8',
    500: '#3747b0',
    950: '#000000',
  },
}

SCSS

$custom: #3747b0;
$custom-light: #7d7ac8;
$custom-dark: #000000;

JSON

{
  "hex": "#3747b0",
  "rgb": {
    "r": 55,
    "g": 71,
    "b": 176
  },
  "hsl": {
    "h": 232.066,
    "s": 52.381,
    "l": 45.294
  },
  "oklch": {
    "l": 0.4502,
    "c": 0.16697,
    "h": 271.4
  },
  "luminance": 0.08453
}

Semantic roles & 50–950 ramp

primary

#3747B0

secondary

#C4BB7F

accent

#C94CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3747B0

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

Preview Lab → · Contrast checker → · Palette generator →