#3747B3#3747B3

#3747B3 is a mid, vivid blue. Relative luminance 0.086; OKLCH L 45.3% C 0.171 H 271.3°. Best body text is #FFFFFF at 7.74:1 contrast (WCAG AA passes).

Color values

HEX	#3747B3
RGB	rgb(55, 71, 179)
HSL	hsl(232, 53%, 46%)
HSV	hsv(232, 69%, 70%)
CMYK	cmyk(69.3%, 60.3%, 0%, 29.8%)
CIE-LAB	lab(35.15, 30.11, -59.30)
CIE-LCH	lch(35.15, 66.51, 296.92°)
OKLab	oklab(45.27% 0.004 -0.171)
OKLCH	oklch(45.27% 0.171 271.3)
XYZ	xyz(11.9627, 8.5722, 43.6633)
Luminance	0.0857 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3747B3 #B3A337

analogous

#3785B3 #3747B3 #6537B3

triadic

#3747B3 #B33747 #47B337

tetradic

#3747B3 #B33785 #B3A337 #37B365

square

#3747B3 #B33785 #B3A337 #37B365

split-complementary

#3747B3 #B36537 #85B337

monochromatic

#1A2255 #293484 #3747B3 #5B69CD #8A94DB

Accessibility & contrast

On white

7.74

#3747B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.71

#3747B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3747B3

7.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3747B3	#FFFFFF	#000000	##FFFFFF
##3747B3	1.00	7.74	2.71	7.74
#FFFFFF	7.74	1.00	21.00	1.00
#000000	2.71	21.00	1.00	21.00
##FFFFFF	7.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058B7

Deuteranopia (green-blind)

#004DB1

Tritanopia (blue-blind)

#006276

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3747b3;
/* rgb */ color: rgb(55, 71, 179);
/* oklch */ color: oklch(45.3% 0.171 271.3);

Tailwind

colors: {
  custom: {
    50: '#7e7acb',
    500: '#3747b3',
    950: '#000000',
  },
}

SCSS

$custom: #3747b3;
$custom-light: #7e7acb;
$custom-dark: #000000;

JSON

{
  "hex": "#3747b3",
  "rgb": {
    "r": 55,
    "g": 71,
    "b": 179
  },
  "hsl": {
    "h": 232.258,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.45273,
    "c": 0.17105,
    "h": 271.3
  },
  "luminance": 0.08573
}

Semantic roles & 50–950 ramp

primary

#3747B3

secondary

#C5BC81

accent

#CA4BDC

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3747B3

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

Preview Lab → · Contrast checker → · Palette generator →