#3688B7#3688B7

#3688B7 is a mid, moderate cyan. Relative luminance 0.218; OKLCH L 59.8% C 0.106 H 237.6°. Best body text is #000000 at 5.36:1 contrast (WCAG AA passes).

Color values

HEX#3688B7
RGBrgb(54, 136, 183)
HSLhsl(202, 54%, 46%)
HSVhsv(202, 70%, 72%)
CMYKcmyk(70.5%, 25.7%, 0%, 28.2%)
CIE-LABlab(53.82, -9.28, -31.83)
CIE-LCHlch(53.82, 33.16, 253.74°)
OKLaboklab(59.76% -0.0569 -0.0897)
OKLCHoklch(59.76% 0.106 237.6)
XYZxyz(18.8694, 21.8094, 48.0057)
Luminance0.2181 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3688B7 #B76536
analogous
#36B7A6 #3688B7 #3648B7
triadic
#3688B7 #B73688 #88B736
tetradic
#3688B7 #A636B7 #B76536 #48B736
square
#3688B7 #A636B7 #B76536 #48B736
split-complementary
#3688B7 #B73648 #B7A636
monochromatic
#1A4258 #286588 #3688B7 #5BA5CF #8BBFDD

Accessibility & contrast

On white

3.92
#3688B7 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.36
#3688B7 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3688B7
5.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3688B7#FFFFFF#000000##000000
##3688B71.003.925.365.36
#FFFFFF3.921.0021.0021.00
#0000005.3621.001.001.00
##0000005.3621.001.001.00

Color blindness preview

Protanopia (red-blind)
#7288B9
Deuteranopia (green-blind)
#607BB6
Tritanopia (blue-blind)
#009498
Achromatopsia (no color)
#818181

Design tokens & code

CSS
--color: #3688b7;
/* rgb */ color: rgb(54, 136, 183);
/* oklch */ color: oklch(59.8% 0.106 237.6);
Tailwind
colors: {
  custom: {
    50: '#7daacc',
    500: '#3688b7',
    950: '#000000',
  },
}
SCSS
$custom: #3688b7;
$custom-light: #7daacc;
$custom-dark: #000000;
JSON
{
  "hex": "#3688b7",
  "rgb": {
    "r": 54,
    "g": 136,
    "b": 183
  },
  "hsl": {
    "h": 201.86,
    "s": 54.43,
    "l": 46.471
  },
  "oklch": {
    "l": 0.59762,
    "c": 0.1062,
    "h": 237.6
  },
  "luminance": 0.21811
}

Semantic roles & 50–950 ramp

primary
#3688B7
secondary
#C79B82
accent
#804ADE
background
#F8FAFC
surface
#EFF4F9
border
#CACED2
text
#0B1013
muted
#7C7F82

Preview Lab

Preview with #3688B7

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

Preview Lab → · Contrast checker → · Palette generator →

#3688B7 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva