#3787B9#3787B9

#3787B9 is a mid, moderate cyan. Relative luminance 0.216; OKLCH L 59.7% C 0.109 H 239.8°. Best body text is #000000 at 5.33:1 contrast (WCAG AA passes).

Color values

HEX#3787B9
RGBrgb(55, 135, 185)
HSLhsl(203, 54%, 47%)
HSVhsv(203, 70%, 73%)
CMYKcmyk(70.3%, 27%, 0%, 27.5%)
CIE-LABlab(53.64, -7.87, -33.26)
CIE-LCHlch(53.64, 34.18, 256.68°)
OKLaboklab(59.66% -0.0546 -0.0938)
OKLCHoklch(59.66% 0.109 239.8)
XYZxyz(18.9931, 21.6409, 49.0657)
Luminance0.2164 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3787B9 #B96937
analogous
#37B9AA #3787B9 #3746B9
triadic
#3787B9 #B93787 #87B937
tetradic
#3787B9 #AA37B9 #B96937 #46B937
square
#3787B9 #AA37B9 #B96937 #46B937
split-complementary
#3787B9 #B93746 #B9AA37
monochromatic
#1B425B #29658A #3787B9 #5EA4CF #8DBEDD

Accessibility & contrast

On white

3.94
#3787B9 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.33
#3787B9 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3787B9
5.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3787B9#FFFFFF#000000##000000
##3787B91.003.945.335.33
#FFFFFF3.941.0021.0021.00
#0000005.3321.001.001.00
##0000005.3321.001.001.00

Color blindness preview

Protanopia (red-blind)
#7087BB
Deuteranopia (green-blind)
#5E7BB8
Tritanopia (blue-blind)
#009498
Achromatopsia (no color)
#808080

Design tokens & code

CSS
--color: #3787b9;
/* rgb */ color: rgb(55, 135, 185);
/* oklch */ color: oklch(59.7% 0.109 239.8);
Tailwind
colors: {
  custom: {
    50: '#7da9ce',
    500: '#3787b9',
    950: '#000000',
  },
}
SCSS
$custom: #3787b9;
$custom-light: #7da9ce;
$custom-dark: #000000;
JSON
{
  "hex": "#3787b9",
  "rgb": {
    "r": 55,
    "g": 135,
    "b": 185
  },
  "hsl": {
    "h": 203.077,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.59657,
    "c": 0.10854,
    "h": 239.8
  },
  "luminance": 0.21643
}

Semantic roles & 50–950 ramp

primary
#3787B9
secondary
#C89E84
accent
#834ADE
background
#F8FAFC
surface
#EFF4F9
border
#CACED2
text
#0B1013
muted
#7C7F82

Preview Lab

Preview with #3787B9

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

Preview Lab → · Contrast checker → · Palette generator →

#3787B9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva