#3757A4#3757A4

#3757A4 is a mid, vivid blue. Relative luminance 0.103; OKLCH L 47.4% C 0.130 H 264.9°. Best body text is #FFFFFF at 6.86:1 contrast (WCAG AA passes).

Color values

HEX	#3757A4
RGB	rgb(55, 87, 164)
HSL	hsl(222, 50%, 43%)
HSV	hsv(222, 66%, 64%)
CMYK	cmyk(66.5%, 47%, 0%, 35.7%)
CIE-LAB	lab(38.39, 14.16, -45.14)
CIE-LCH	lch(38.39, 47.31, 287.42°)
OKLab	oklab(47.38% -0.0115 -0.1291)
OKLCH	oklch(47.38% 0.13 264.9)
XYZ	xyz(11.6823, 10.3078, 36.4887)
Luminance	0.1031 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757A4 #A48437

analogous

#378EA4 #3757A4 #4D37A4

triadic

#3757A4 #A43757 #57A437

tetradic

#3757A4 #A4378E #A48437 #37A44D

square

#3757A4 #A4378E #A48437 #37A44D

split-complementary

#3757A4 #A44D37 #8EA437

monochromatic

#182648 #283F76 #3757A4 #5374C5 #8199D5

Accessibility & contrast

On white

6.86

#3757A4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.06

#3757A4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757A4

6.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757A4	#FFFFFF	#000000	##FFFFFF
##3757A4	1.00	6.86	3.06	6.86
#FFFFFF	6.86	1.00	21.00	1.00
#000000	3.06	21.00	1.00	21.00
##FFFFFF	6.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3060A7

Deuteranopia (green-blind)

#1C56A2

Tritanopia (blue-blind)

#006975

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3757a4;
/* rgb */ color: rgb(55, 87, 164);
/* oklch */ color: oklch(47.4% 0.130 264.9);

Tailwind

colors: {
  custom: {
    50: '#7a85bf',
    500: '#3757a4',
    950: '#000000',
  },
}

SCSS

$custom: #3757a4;
$custom-light: #7a85bf;
$custom-dark: #000000;

JSON

{
  "hex": "#3757a4",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 164
  },
  "hsl": {
    "h": 222.385,
    "s": 49.772,
    "l": 42.941
  },
  "oklch": {
    "l": 0.47377,
    "c": 0.12965,
    "h": 264.9
  },
  "luminance": 0.10309
}

Semantic roles & 50–950 ramp

primary

#3757A4

secondary

#BEAA79

accent

#B14FD9

background

#F7F8FB

surface

#EEEFF7

border

#C9CAD0

text

#0A0B12

muted

#7C7C81

Preview Lab

Preview with #3757A4

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

Preview Lab → · Contrast checker → · Palette generator →