#3757B2#3757B2

#3757B2 is a mid, vivid blue. Relative luminance 0.108; OKLCH L 48.4% C 0.149 H 266.3°. Best body text is #FFFFFF at 6.63:1 contrast (WCAG AA passes).

Color values

HEX	#3757B2
RGB	rgb(55, 87, 178)
HSL	hsl(224, 53%, 46%)
HSV	hsv(224, 69%, 70%)
CMYK	cmyk(69.1%, 51.1%, 0%, 30.2%)
CIE-LAB	lab(39.31, 19.31, -51.95)
CIE-LCH	lch(39.31, 55.43, 290.39°)
OKLab	oklab(48.38% -0.0096 -0.1492)
OKLCH	oklch(48.38% 0.149 266.3)
XYZ	xyz(13.0168, 10.8417, 43.5175)
Luminance	0.1084 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757B2 #B29237

analogous

#3794B2 #3757B2 #5437B2

triadic

#3757B2 #B23757 #57B237

tetradic

#3757B2 #B23794 #B29237 #37B254

square

#3757B2 #B23794 #B29237 #37B254

split-complementary

#3757B2 #B25437 #94B237

monochromatic

#1A2954 #294083 #3757B2 #5A78CC #899EDB

Accessibility & contrast

On white

6.63

#3757B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.17

#3757B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757B2

6.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757B2	#FFFFFF	#000000	##FFFFFF
##3757B2	1.00	6.63	3.17	6.63
#FFFFFF	6.63	1.00	21.00	1.00
#000000	3.17	21.00	1.00	21.00
##FFFFFF	6.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2163B5

Deuteranopia (green-blind)

#0057B0

Tritanopia (blue-blind)

#006C7C

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3757b2;
/* rgb */ color: rgb(55, 87, 178);
/* oklch */ color: oklch(48.4% 0.149 266.3);

Tailwind

colors: {
  custom: {
    50: '#7c85ca',
    500: '#3757b2',
    950: '#000000',
  },
}

SCSS

$custom: #3757b2;
$custom-light: #7c85ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3757b2",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 178
  },
  "hsl": {
    "h": 224.39,
    "s": 52.79,
    "l": 45.686
  },
  "oklch": {
    "l": 0.48377,
    "c": 0.14949,
    "h": 266.3
  },
  "luminance": 0.10843
}

Semantic roles & 50–950 ramp

primary

#3757B2

secondary

#C5B380

accent

#B74CDC

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3757B2

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

Preview Lab → · Contrast checker → · Palette generator →