#3757B4#3757B4

#3757B4 is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.5% C 0.152 H 266.4°. Best body text is #FFFFFF at 6.59:1 contrast (WCAG AA passes).

Color values

HEX	#3757B4
RGB	rgb(55, 87, 180)
HSL	hsl(225, 53%, 46%)
HSV	hsv(225, 69%, 71%)
CMYK	cmyk(69.4%, 51.7%, 0%, 29.4%)
CIE-LAB	lab(39.45, 20.05, -52.91)
CIE-LCH	lch(39.45, 56.58, 290.75°)
OKLab	oklab(48.53% -0.0094 -0.152)
OKLCH	oklch(48.53% 0.152 266.4)
XYZ	xyz(13.2191, 10.9226, 44.5828)
Luminance	0.1092 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757B4 #B49437

analogous

#3795B4 #3757B4 #5537B4

triadic

#3757B4 #B43757 #57B437

tetradic

#3757B4 #B43795 #B49437 #37B455

square

#3757B4 #B43795 #B49437 #37B455

split-complementary

#3757B4 #B45537 #95B437

monochromatic

#1A2A56 #294085 #3757B4 #5B78CD #8A9FDB

Accessibility & contrast

On white

6.59

#3757B4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.18

#3757B4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757B4

6.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757B4	#FFFFFF	#000000	##FFFFFF
##3757B4	1.00	6.59	3.18	6.59
#FFFFFF	6.59	1.00	21.00	1.00
#000000	3.18	21.00	1.00	21.00
##FFFFFF	6.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E63B7

Deuteranopia (green-blind)

#0057B2

Tritanopia (blue-blind)

#006D7D

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3757b4;
/* rgb */ color: rgb(55, 87, 180);
/* oklch */ color: oklch(48.5% 0.152 266.4);

Tailwind

colors: {
  custom: {
    50: '#7d85cb',
    500: '#3757b4',
    950: '#000000',
  },
}

SCSS

$custom: #3757b4;
$custom-light: #7d85cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3757b4",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 180
  },
  "hsl": {
    "h": 224.64,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.48525,
    "c": 0.15228,
    "h": 266.4
  },
  "luminance": 0.10924
}

Semantic roles & 50–950 ramp

primary

#3757B4

secondary

#C6B481

accent

#B74BDD

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3757B4

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

Preview Lab → · Contrast checker → · Palette generator →