#3757AC#3757AC

#3757AC is a mid, vivid blue. Relative luminance 0.106; OKLCH L 47.9% C 0.141 H 265.8°. Best body text is #FFFFFF at 6.73:1 contrast (WCAG AA passes).

Color values

HEX	#3757AC
RGB	rgb(55, 87, 172)
HSL	hsl(224, 52%, 45%)
HSV	hsv(224, 68%, 67%)
CMYK	cmyk(68%, 49.4%, 0%, 32.5%)
CIE-LAB	lab(38.91, 17.10, -49.06)
CIE-LCH	lch(38.91, 51.96, 289.22°)
OKLab	oklab(47.94% -0.0104 -0.1407)
OKLCH	oklch(47.94% 0.141 265.8)
XYZ	xyz(12.4275, 10.6060, 40.4139)
Luminance	0.1061 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757AC #AC8C37

analogous

#3792AC #3757AC #5237AC

triadic

#3757AC #AC3757 #57AC37

tetradic

#3757AC #AC3792 #AC8C37 #37AC52

square

#3757AC #AC3792 #AC8C37 #37AC52

split-complementary

#3757AC #AC5237 #92AC37

monochromatic

#19284F #28407E #3757AC #5776C9 #859CD8

Accessibility & contrast

On white

6.73

#3757AC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#3757AC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757AC

6.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757AC	#FFFFFF	#000000	##FFFFFF
##3757AC	1.00	6.73	3.12	6.73
#FFFFFF	6.73	1.00	21.00	1.00
#000000	3.12	21.00	1.00	21.00
##FFFFFF	6.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2861AF

Deuteranopia (green-blind)

#0757AA

Tritanopia (blue-blind)

#006B79

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #3757ac;
/* rgb */ color: rgb(55, 87, 172);
/* oklch */ color: oklch(47.9% 0.141 265.8);

Tailwind

colors: {
  custom: {
    50: '#7b85c5',
    500: '#3757ac',
    950: '#000000',
  },
}

SCSS

$custom: #3757ac;
$custom-light: #7b85c5;
$custom-dark: #000000;

JSON

{
  "hex": "#3757ac",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 172
  },
  "hsl": {
    "h": 223.59,
    "s": 51.542,
    "l": 44.51
  },
  "oklch": {
    "l": 0.47941,
    "c": 0.14104,
    "h": 265.8
  },
  "luminance": 0.10607
}

Semantic roles & 50–950 ramp

primary

#3757AC

secondary

#C2AF7D

accent

#B44DDB

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #3757AC

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

Preview Lab → · Contrast checker → · Palette generator →