#278EA4#278EA4

#278EA4 is a mid, moderate cyan. Relative luminance 0.225; OKLCH L 59.9% C 0.095 H 215.6°. Best body text is #000000 at 5.49:1 contrast (WCAG AA passes).

Color values

HEX	#278EA4
RGB	rgb(39, 142, 164)
HSL	hsl(191, 62%, 40%)
HSV	hsv(191, 76%, 64%)
CMYK	cmyk(76.2%, 13.4%, 0%, 35.7%)
CIE-LAB	lab(54.51, -21.05, -19.91)
CIE-LCH	lch(54.51, 28.98, 223.41°)
OKLab	oklab(59.94% -0.0776 -0.0556)
OKLCH	oklch(59.94% 0.095 215.6)
XYZ	xyz(17.2077, 22.4556, 38.5422)
Luminance	0.2246 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#278EA4 #A43D27

analogous

#27A47C #278EA4 #2750A4

triadic

#278EA4 #A4278E #8EA427

tetradic

#278EA4 #7C27A4 #A43D27 #50A427

square

#278EA4 #7C27A4 #A43D27 #50A427

split-complementary

#278EA4 #A42750 #A47C27

monochromatic

#0F3841 #1B6373 #278EA4 #38B5D0 #6AC8DC

Accessibility & contrast

On white

3.82

#278EA4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.49

#278EA4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #278EA4

5.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##278EA4	#FFFFFF	#000000	##000000
##278EA4	1.00	3.82	5.49	5.49
#FFFFFF	3.82	1.00	21.00	21.00
#000000	5.49	21.00	1.00	1.00
##000000	5.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7F89A5

Deuteranopia (green-blind)

#6E7DA4

Tritanopia (blue-blind)

#009695

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #278ea4;
/* rgb */ color: rgb(39, 142, 164);
/* oklch */ color: oklch(59.9% 0.095 215.6);

Tailwind

colors: {
  custom: {
    50: '#75afbf',
    500: '#278ea4',
    950: '#000000',
  },
}

SCSS

$custom: #278ea4;
$custom-light: #75afbf;
$custom-dark: #000000;

JSON

{
  "hex": "#278ea4",
  "rgb": {
    "r": 39,
    "g": 142,
    "b": 164
  },
  "hsl": {
    "h": 190.56,
    "s": 61.576,
    "l": 39.804
  },
  "oklch": {
    "l": 0.59944,
    "c": 0.09541,
    "h": 215.6
  },
  "luminance": 0.22458
}

Semantic roles & 50–950 ramp

primary

#278EA4

secondary

#C27565

accent

#6043E5

background

#F7FAFB

surface

#EEF4F7

border

#C9CED0

text

#0A1012

muted

#7C7F81

Preview Lab

Preview with #278EA4

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

Preview Lab → · Contrast checker → · Palette generator →