#3743BD#3743BD

#3743BD is a mid, vivid blue. Relative luminance 0.085; OKLCH L 45.4% C 0.189 H 272.0°. Best body text is #FFFFFF at 7.78:1 contrast (WCAG AA passes).

Color values

HEX	#3743BD
RGB	rgb(55, 67, 189)
HSL	hsl(235, 55%, 48%)
HSV	hsv(235, 71%, 74%)
CMYK	cmyk(70.9%, 64.6%, 0%, 25.9%)
CIE-LAB	lab(35.00, 36.22, -65.44)
CIE-LCH	lch(35.00, 74.79, 298.96°)
OKLab	oklab(45.43% 0.0066 -0.189)
OKLCH	oklch(45.43% 0.189 272)
XYZ	xyz(12.7649, 8.4994, 49.1021)
Luminance	0.0850 (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

#3743BD #BDB137

analogous

#3786BD #3743BD #6E37BD

triadic

#3743BD #BD3743 #43BD37

tetradic

#3743BD #BD3786 #BDB137 #37BD6E

square

#3743BD #BD3786 #BDB137 #37BD6E

split-complementary

#3743BD #BD6E37 #86BD37

monochromatic

#1B215E #29328E #3743BD #606AD1 #9097DF

Accessibility & contrast

On white

7.78

#3743BD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#3743BD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3743BD

7.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3743BD	#FFFFFF	#000000	##FFFFFF
##3743BD	1.00	7.78	2.70	7.78
#FFFFFF	7.78	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059C1

Deuteranopia (green-blind)

#004CBB

Tritanopia (blue-blind)

#00637A

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3743bd;
/* rgb */ color: rgb(55, 67, 189);
/* oklch */ color: oklch(45.4% 0.189 272.0);

Tailwind

colors: {
  custom: {
    50: '#8077d2',
    500: '#3743bd',
    950: '#000000',
  },
}

SCSS

$custom: #3743bd;
$custom-light: #8077d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3743bd",
  "rgb": {
    "r": 55,
    "g": 67,
    "b": 189
  },
  "hsl": {
    "h": 234.627,
    "s": 54.918,
    "l": 47.843
  },
  "oklch": {
    "l": 0.45426,
    "c": 0.18915,
    "h": 272
  },
  "luminance": 0.08501
}

Semantic roles & 50–950 ramp

primary

#3743BD

secondary

#C9C386

accent

#D14ADE

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #3743BD

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

Preview Lab → · Contrast checker → · Palette generator →