#3757B5#3757B5

#3757B5 is a mid, vivid blue. Relative luminance 0.110; OKLCH L 48.6% C 0.154 H 266.5°. Best body text is #FFFFFF at 6.58:1 contrast (WCAG AA passes).

Color values

HEX	#3757B5
RGB	rgb(55, 87, 181)
HSL	hsl(225, 53%, 46%)
HSV	hsv(225, 70%, 71%)
CMYK	cmyk(69.6%, 51.9%, 0%, 29%)
CIE-LAB	lab(39.52, 20.41, -53.39)
CIE-LCH	lch(39.52, 57.16, 290.93°)
OKLab	oklab(48.6% -0.0093 -0.1534)
OKLCH	oklch(48.6% 0.154 266.5)
XYZ	xyz(13.3213, 10.9635, 45.1212)
Luminance	0.1096 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757B5 #B59537

analogous

#3796B5 #3757B5 #5637B5

triadic

#3757B5 #B53757 #57B537

tetradic

#3757B5 #B53796 #B59537 #37B556

square

#3757B5 #B53796 #B59537 #37B556

split-complementary

#3757B5 #B55637 #96B537

monochromatic

#1A2A57 #294086 #3757B5 #5C79CD #8B9FDC

Accessibility & contrast

On white

6.58

#3757B5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#3757B5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757B5

6.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757B5	#FFFFFF	#000000	##FFFFFF
##3757B5	1.00	6.58	3.19	6.58
#FFFFFF	6.58	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C63B8

Deuteranopia (green-blind)

#0058B3

Tritanopia (blue-blind)

#006D7D

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3757b5;
/* rgb */ color: rgb(55, 87, 181);
/* oklch */ color: oklch(48.6% 0.154 266.5);

Tailwind

colors: {
  custom: {
    50: '#7d85cc',
    500: '#3757b5',
    950: '#000000',
  },
}

SCSS

$custom: #3757b5;
$custom-light: #7d85cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3757b5",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 181
  },
  "hsl": {
    "h": 224.762,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.486,
    "c": 0.15367,
    "h": 266.5
  },
  "luminance": 0.10965
}

Semantic roles & 50–950 ramp

primary

#3757B5

secondary

#C6B582

accent

#B84BDD

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3757B5

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

Preview Lab → · Contrast checker → · Palette generator →