#278FAB#278FAB

#278FAB is a mid, moderate cyan. Relative luminance 0.230; OKLCH L 60.5% C 0.099 H 220.4°. Best body text is #000000 at 5.60:1 contrast (WCAG AA passes).

Color values

HEX#278FAB
RGBrgb(39, 143, 171)
HSLhsl(193, 63%, 41%)
HSVhsv(193, 77%, 67%)
CMYKcmyk(77.2%, 16.4%, 0%, 32.9%)
CIE-LABlab(55.09, -19.24, -23.04)
CIE-LCHlch(55.09, 30.02, 230.13°)
OKLaboklab(60.5% -0.0757 -0.0644)
OKLCHoklch(60.5% 0.099 220.4)
XYZxyz(18.0068, 23.0143, 42.0134)
Luminance0.2302 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#278FAB #AB4327
analogous
#27AB85 #278FAB #274DAB
triadic
#278FAB #AB278F #8FAB27
tetradic
#278FAB #8527AB #AB4327 #4DAB27
square
#278FAB #8527AB #AB4327 #4DAB27
split-complementary
#278FAB #AB274D #AB8527
monochromatic
#103C47 #1C6579 #278FAB #3DB3D3 #6EC6DE

Accessibility & contrast

On white

3.75
#278FAB on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.60
#278FAB on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #278FAB
5.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##278FAB#FFFFFF#000000##000000
##278FAB1.003.755.605.60
#FFFFFF3.751.0021.0021.00
#0000005.6021.001.001.00
##0000005.6021.001.001.00

Color blindness preview

Protanopia (red-blind)
#7E8BAC
Deuteranopia (green-blind)
#6C7EAB
Tritanopia (blue-blind)
#009898
Achromatopsia (no color)
#848484

Design tokens & code

CSS
--color: #278fab;
/* rgb */ color: rgb(39, 143, 171);
/* oklch */ color: oklch(60.5% 0.099 220.4);
Tailwind
colors: {
  custom: {
    50: '#76b0c4',
    500: '#278fab',
    950: '#000000',
  },
}
SCSS
$custom: #278fab;
$custom-light: #76b0c4;
$custom-dark: #000000;
JSON
{
  "hex": "#278fab",
  "rgb": {
    "r": 39,
    "g": 143,
    "b": 171
  },
  "hsl": {
    "h": 192.727,
    "s": 62.857,
    "l": 41.176
  },
  "oklch": {
    "l": 0.605,
    "c": 0.09944,
    "h": 220.4
  },
  "luminance": 0.23017
}

Semantic roles & 50–950 ramp

primary
#278FAB
secondary
#C57D69
accent
#6542E6
background
#F7FAFC
surface
#EEF4F8
border
#C9CED1
text
#0A1012
muted
#7C7F81

Preview Lab

Preview with #278FAB

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

Preview Lab → · Contrast checker → · Palette generator →

#278FAB Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva