#3757BD#3757BD

#3757BD is a mid, vivid blue. Relative luminance 0.113; OKLCH L 49.2% C 0.165 H 267.0°. Best body text is #FFFFFF at 6.44:1 contrast (WCAG AA passes).

Color values

HEX	#3757BD
RGB	rgb(55, 87, 189)
HSL	hsl(226, 55%, 48%)
HSV	hsv(226, 71%, 74%)
CMYK	cmyk(70.9%, 54%, 0%, 25.9%)
CIE-LAB	lab(40.08, 23.36, -57.16)
CIE-LCH	lch(40.08, 61.75, 292.23°)
OKLab	oklab(49.21% -0.0086 -0.1645)
OKLCH	oklch(49.21% 0.165 267)
XYZ	xyz(14.1659, 11.3013, 49.5691)
Luminance	0.1130 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757BD #BD9D37

analogous

#379ABD #3757BD #5A37BD

triadic

#3757BD #BD3757 #57BD37

tetradic

#3757BD #BD379A #BD9D37 #37BD5A

square

#3757BD #BD379A #BD9D37 #37BD5A

split-complementary

#3757BD #BD5A37 #9ABD37

monochromatic

#1B2B5E #29418E #3757BD #607BD1 #90A3DF

Accessibility & contrast

On white

6.44

#3757BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#3757BD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757BD

6.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757BD	#FFFFFF	#000000	##FFFFFF
##3757BD	1.00	6.44	3.26	6.44
#FFFFFF	6.44	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0665C1

Deuteranopia (green-blind)

#0059BB

Tritanopia (blue-blind)

#007081

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3757bd;
/* rgb */ color: rgb(55, 87, 189);
/* oklch */ color: oklch(49.2% 0.165 267.0);

Tailwind

colors: {
  custom: {
    50: '#7f85d2',
    500: '#3757bd',
    950: '#000000',
  },
}

SCSS

$custom: #3757bd;
$custom-light: #7f85d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3757bd",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 189
  },
  "hsl": {
    "h": 225.672,
    "s": 54.918,
    "l": 47.843
  },
  "oklch": {
    "l": 0.49206,
    "c": 0.16472,
    "h": 267
  },
  "luminance": 0.11303
}

Semantic roles & 50–950 ramp

primary

#3757BD

secondary

#C9B986

accent

#BB4ADE

background

#F8F8FD

surface

#EFEFFA

border

#CACAD3

text

#0B0B14

muted

#7C7C83

Preview Lab

Preview with #3757BD

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

Preview Lab → · Contrast checker → · Palette generator →