#3743BC#3743BC

#3743BC is a mid, vivid blue. Relative luminance 0.085; OKLCH L 45.3% C 0.188 H 272.0°. Best body text is #FFFFFF at 7.80:1 contrast (WCAG AA passes).

Color values

HEX	#3743BC
RGB	rgb(55, 67, 188)
HSL	hsl(235, 55%, 48%)
HSV	hsv(235, 71%, 74%)
CMYK	cmyk(70.7%, 64.4%, 0%, 26.3%)
CIE-LAB	lab(34.92, 35.87, -64.99)
CIE-LCH	lch(34.92, 74.23, 298.89°)
OKLab	oklab(45.34% 0.0067 -0.1877)
OKLCH	oklch(45.34% 0.188 272)
XYZ	xyz(12.6567, 8.4561, 48.5324)
Luminance	0.0846 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3743BC #BCB037

analogous

#3786BC #3743BC #6D37BC

triadic

#3743BC #BC3743 #43BC37

tetradic

#3743BC #BC3786 #BCB037 #37BC6D

square

#3743BC #BC3786 #BCB037 #37BC6D

split-complementary

#3743BC #BC6D37 #86BC37

monochromatic

#1B215D #29328D #3743BC #606AD0 #8F96DE

Accessibility & contrast

On white

7.80

#3743BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#3743BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3743BC

7.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3743BC	#FFFFFF	#000000	##FFFFFF
##3743BC	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)

#0058C0

Deuteranopia (green-blind)

#004CBA

Tritanopia (blue-blind)

#006379

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3743bc;
/* rgb */ color: rgb(55, 67, 188);
/* oklch */ color: oklch(45.3% 0.188 272.0);

Tailwind

colors: {
  custom: {
    50: '#8077d1',
    500: '#3743bc',
    950: '#000000',
  },
}

SCSS

$custom: #3743bc;
$custom-light: #8077d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3743bc",
  "rgb": {
    "r": 55,
    "g": 67,
    "b": 188
  },
  "hsl": {
    "h": 234.586,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.45336,
    "c": 0.18784,
    "h": 272
  },
  "luminance": 0.08457
}

Semantic roles & 50–950 ramp

primary

#3743BC

secondary

#C9C386

accent

#D14ADE

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #3743BC

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

Preview Lab → · Contrast checker → · Palette generator →