#278AB4#278AB4

#278AB4 is a mid, moderate cyan. Relative luminance 0.219; OKLCH L 59.7% C 0.108 H 231.4°. Best body text is #000000 at 5.38:1 contrast (WCAG AA passes).

Color values

HEX	#278AB4
RGB	rgb(39, 138, 180)
HSL	hsl(198, 64%, 43%)
HSV	hsv(198, 78%, 71%)
CMYK	cmyk(78.3%, 23.3%, 0%, 29.4%)
CIE-LAB	lab(53.92, -13.41, -29.99)
CIE-LCH	lch(53.92, 32.85, 245.91°)
OKLab	oklab(59.69% -0.0674 -0.0844)
OKLCH	oklch(59.69% 0.108 231.4)
XYZ	xyz(18.1601, 21.9014, 46.4414)
Luminance	0.2190 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#278AB4 #B45127

analogous

#27B497 #278AB4 #2744B4

triadic

#278AB4 #B4278A #8AB427

tetradic

#278AB4 #9727B4 #B45127 #44B427

square

#278AB4 #9727B4 #B45127 #44B427

split-complementary

#278AB4 #B42744 #B49727

monochromatic

#113D4F #1C6382 #278AB4 #42AAD6 #74C1E1

Accessibility & contrast

On white

3.90

#278AB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.38

#278AB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #278AB4

5.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##278AB4	#FFFFFF	#000000	##000000
##278AB4	1.00	3.90	5.38	5.38
#FFFFFF	3.90	1.00	21.00	21.00
#000000	5.38	21.00	1.00	1.00
##000000	5.38	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7588B6

Deuteranopia (green-blind)

#627BB3

Tritanopia (blue-blind)

#009598

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #278ab4;
/* rgb */ color: rgb(39, 138, 180);
/* oklch */ color: oklch(59.7% 0.108 231.4);

Tailwind

colors: {
  custom: {
    50: '#77acca',
    500: '#278ab4',
    950: '#000000',
  },
}

SCSS

$custom: #278ab4;
$custom-light: #77acca;
$custom-dark: #000000;

JSON

{
  "hex": "#278ab4",
  "rgb": {
    "r": 39,
    "g": 138,
    "b": 180
  },
  "hsl": {
    "h": 197.872,
    "s": 64.384,
    "l": 42.941
  },
  "oklch": {
    "l": 0.5969,
    "c": 0.10805,
    "h": 231.4
  },
  "luminance": 0.21904
}

Semantic roles & 50–950 ramp

primary

#278AB4

secondary

#C8896F

accent

#7240E7

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #278AB4

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

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