#278DB4#278DB4

#278DB4 is a mid, moderate cyan. Relative luminance 0.228; OKLCH L 60.4% C 0.107 H 228.8°. Best body text is #000000 at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#278DB4
RGB	rgb(39, 141, 180)
HSL	hsl(197, 64%, 43%)
HSV	hsv(197, 78%, 71%)
CMYK	cmyk(78.3%, 21.7%, 0%, 29.4%)
CIE-LAB	lab(54.84, -15.07, -28.57)
CIE-LCH	lch(54.84, 32.30, 242.19°)
OKLab	oklab(60.42% -0.0703 -0.0803)
OKLCH	oklch(60.42% 0.107 228.8)
XYZ	xyz(18.5964, 22.7741, 46.5869)
Luminance	0.2278 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#278DB4 #B44E27

analogous

#27B495 #278DB4 #2746B4

triadic

#278DB4 #B4278D #8DB427

tetradic

#278DB4 #9527B4 #B44E27 #46B427

square

#278DB4 #9527B4 #B44E27 #46B427

split-complementary

#278DB4 #B42746 #B49527

monochromatic

#113E4F #1C6682 #278DB4 #42ADD6 #74C3E1

Accessibility & contrast

On white

3.78

#278DB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.56

#278DB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #278DB4

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##278DB4	#FFFFFF	#000000	##000000
##278DB4	1.00	3.78	5.56	5.56
#FFFFFF	3.78	1.00	21.00	21.00
#000000	5.56	21.00	1.00	1.00
##000000	5.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#798BB6

Deuteranopia (green-blind)

#667DB3

Tritanopia (blue-blind)

#00989A

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #278db4;
/* rgb */ color: rgb(39, 141, 180);
/* oklch */ color: oklch(60.4% 0.107 228.8);

Tailwind

colors: {
  custom: {
    50: '#78aeca',
    500: '#278db4',
    950: '#000000',
  },
}

SCSS

$custom: #278db4;
$custom-light: #78aeca;
$custom-dark: #000000;

JSON

{
  "hex": "#278db4",
  "rgb": {
    "r": 39,
    "g": 141,
    "b": 180
  },
  "hsl": {
    "h": 196.596,
    "s": 64.384,
    "l": 42.941
  },
  "oklch": {
    "l": 0.60422,
    "c": 0.10674,
    "h": 228.8
  },
  "luminance": 0.22776
}

Semantic roles & 50–950 ramp

primary

#278DB4

secondary

#C8876F

accent

#6F40E7

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #278DB4

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

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