#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
RGB	rgb(39, 139, 180)
HSL	hsl(197, 64%, 43%)
HSV	hsv(197, 78%, 71%)
CMYK	cmyk(78.3%, 22.8%, 0%, 29.4%)
CIE-LAB	lab(54.23, -13.96, -29.52)
CIE-LCH	lch(54.23, 32.66, 244.68°)
OKLab	oklab(59.93% -0.0684 -0.0831)
OKLCH	oklch(59.93% 0.108 230.5)
XYZ	xyz(18.3042, 22.1896, 46.4895)
Luminance	0.2219 (WCAG relative)
Temperature	cool
Family	cyan

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
##278BB4	1.00	3.86	5.44	5.44
#FFFFFF	3.86	1.00	21.00	21.00
#000000	5.44	21.00	1.00	1.00
##000000	5.44	21.00	1.00	1.00

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.

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