#278BB4#278BB4

#278BB4 is a mid, moderate cyan. Relative luminance 0.222; OKLCH L 59.9% C 0.108 H 230.5°. Best body text is #000000 at 5.44:1 contrast (WCAG AA passes).

Color values

HEX#278BB4
RGBrgb(39, 139, 180)
HSLhsl(197, 64%, 43%)
HSVhsv(197, 78%, 71%)
CMYKcmyk(78.3%, 22.8%, 0%, 29.4%)
CIE-LABlab(54.23, -13.96, -29.52)
CIE-LCHlch(54.23, 32.66, 244.68°)
OKLaboklab(59.93% -0.0684 -0.0831)
OKLCHoklch(59.93% 0.108 230.5)
XYZxyz(18.3042, 22.1896, 46.4895)
Luminance0.2219 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#278BB4 #B45027
analogous
#27B497 #278BB4 #2744B4
triadic
#278BB4 #B4278B #8BB427
tetradic
#278BB4 #9727B4 #B45027 #44B427
square
#278BB4 #9727B4 #B45027 #44B427
split-complementary
#278BB4 #B42744 #B49727
monochromatic
#113D4F #1C6482 #278BB4 #42ABD6 #74C1E1

Accessibility & contrast

On white

3.86
#278BB4 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.44
#278BB4 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #278BB4
5.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##278BB4#FFFFFF#000000##000000
##278BB41.003.865.445.44
#FFFFFF3.861.0021.0021.00
#0000005.4421.001.001.00
##0000005.4421.001.001.00

Color blindness preview

Protanopia (red-blind)
#7689B6
Deuteranopia (green-blind)
#637CB3
Tritanopia (blue-blind)
#009699
Achromatopsia (no color)
#828282

Design tokens & code

CSS
--color: #278bb4;
/* rgb */ color: rgb(39, 139, 180);
/* oklch */ color: oklch(59.9% 0.108 230.5);
Tailwind
colors: {
  custom: {
    50: '#77acca',
    500: '#278bb4',
    950: '#000000',
  },
}
SCSS
$custom: #278bb4;
$custom-light: #77acca;
$custom-dark: #000000;
JSON
{
  "hex": "#278bb4",
  "rgb": {
    "r": 39,
    "g": 139,
    "b": 180
  },
  "hsl": {
    "h": 197.447,
    "s": 64.384,
    "l": 42.941
  },
  "oklch": {
    "l": 0.59934,
    "c": 0.10759,
    "h": 230.5
  },
  "luminance": 0.22192
}

Semantic roles & 50–950 ramp

primary
#278BB4
secondary
#C8896F
accent
#7140E7
background
#F7FAFC
surface
#EEF4F8
border
#C9CED1
text
#0A1013
muted
#7C7F82

Preview Lab

Preview with #278BB4

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

Preview Lab → · Contrast checker → · Palette generator →

#278BB4 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva