#278DAB#278DAB

#278DAB is a mid, moderate cyan. Relative luminance 0.224; OKLCH L 60.0% C 0.100 H 222.3°. Best body text is #000000 at 5.48:1 contrast (WCAG AA passes).

Color values

HEX	#278DAB
RGB	rgb(39, 141, 171)
HSL	hsl(194, 63%, 41%)
HSV	hsv(194, 77%, 67%)
CMYK	cmyk(77.2%, 17.5%, 0%, 32.9%)
CIE-LAB	lab(54.47, -18.17, -23.99)
CIE-LCH	lch(54.47, 30.09, 232.86°)
OKLab	oklab(60% -0.0737 -0.0672)
OKLCH	oklch(60% 0.1 222.3)
XYZ	xyz(17.7092, 22.4192, 41.9142)
Luminance	0.2242 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#278DAB #AB4527

analogous

#27AB87 #278DAB #274BAB

triadic

#278DAB #AB278D #8DAB27

tetradic

#278DAB #8727AB #AB4527 #4BAB27

square

#278DAB #8727AB #AB4527 #4BAB27

split-complementary

#278DAB #AB274B #AB8727

monochromatic

#103B47 #1C6479 #278DAB #3DB1D3 #6EC5DE

Accessibility & contrast

On white

3.83

#278DAB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.48

#278DAB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #278DAB

5.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##278DAB	#FFFFFF	#000000	##000000
##278DAB	1.00	3.83	5.48	5.48
#FFFFFF	3.83	1.00	21.00	21.00
#000000	5.48	21.00	1.00	1.00
##000000	5.48	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C8AAD

Deuteranopia (green-blind)

#6A7DAB

Tritanopia (blue-blind)

#009697

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #278dab;
/* rgb */ color: rgb(39, 141, 171);
/* oklch */ color: oklch(60.0% 0.100 222.3);

Tailwind

colors: {
  custom: {
    50: '#76aec4',
    500: '#278dab',
    950: '#000000',
  },
}

SCSS

$custom: #278dab;
$custom-light: #76aec4;
$custom-dark: #000000;

JSON

{
  "hex": "#278dab",
  "rgb": {
    "r": 39,
    "g": 141,
    "b": 171
  },
  "hsl": {
    "h": 193.636,
    "s": 62.857,
    "l": 41.176
  },
  "oklch": {
    "l": 0.60004,
    "c": 0.09975,
    "h": 222.3
  },
  "luminance": 0.22421
}

Semantic roles & 50–950 ramp

primary

#278DAB

secondary

#C57E69

accent

#6742E6

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1012

muted

#7C7F81

Preview Lab

Preview with #278DAB

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

Preview Lab → · Contrast checker → · Palette generator →