#3757A8#3757A8

#3757A8 is a mid, vivid blue. Relative luminance 0.105; OKLCH L 47.7% C 0.135 H 265.4°. Best body text is #FFFFFF at 6.79:1 contrast (WCAG AA passes).

Color values

HEX#3757A8
RGBrgb(55, 87, 168)
HSLhsl(223, 51%, 44%)
HSVhsv(223, 67%, 66%)
CMYKcmyk(67.3%, 48.2%, 0%, 34.1%)
CIE-LABlab(38.65, 15.63, -47.11)
CIE-LCHlch(38.65, 49.64, 288.35°)
OKLaboklab(47.66% -0.0109 -0.1349)
OKLCHoklch(47.66% 0.135 265.4)
XYZxyz(12.0492, 10.4546, 38.4211)
Luminance0.1046 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3757A8 #A88837
analogous
#378FA8 #3757A8 #4F37A8
triadic
#3757A8 #A83757 #57A837
tetradic
#3757A8 #A8378F #A88837 #37A84F
square
#3757A8 #A8378F #A88837 #37A84F
split-complementary
#3757A8 #A84F37 #8FA837
monochromatic
#19274C #283F7A #3757A8 #5575C7 #839BD6

Accessibility & contrast

On white

6.79
#3757A8 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.09
#3757A8 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757A8
6.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3757A8#FFFFFF#000000##FFFFFF
##3757A81.006.793.096.79
#FFFFFF6.791.0021.001.00
#0000003.0921.001.0021.00
##FFFFFF6.791.0021.001.00

Color blindness preview

Protanopia (red-blind)
#2D60AB
Deuteranopia (green-blind)
#1456A6
Tritanopia (blue-blind)
#006A77
Achromatopsia (no color)
#5B5B5B

Design tokens & code

CSS
--color: #3757a8;
/* rgb */ color: rgb(55, 87, 168);
/* oklch */ color: oklch(47.7% 0.135 265.4);
Tailwind
colors: {
  custom: {
    50: '#7a85c2',
    500: '#3757a8',
    950: '#000000',
  },
}
SCSS
$custom: #3757a8;
$custom-light: #7a85c2;
$custom-dark: #000000;
JSON
{
  "hex": "#3757a8",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 168
  },
  "hsl": {
    "h": 223.009,
    "s": 50.673,
    "l": 43.725
  },
  "oklch": {
    "l": 0.47656,
    "c": 0.13537,
    "h": 265.4
  },
  "luminance": 0.10456
}

Semantic roles & 50–950 ramp

primary
#3757A8
secondary
#C0AC7B
accent
#B24EDA
background
#F7F8FC
surface
#EEEFF8
border
#C9CAD1
text
#0A0B12
muted
#7C7C81

Preview Lab

Preview with #3757A8

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

Preview Lab → · Contrast checker → · Palette generator →

#3757A8 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva