#278DB3#278DB3

#278DB3 is a mid, moderate cyan. Relative luminance 0.227; OKLCH L 60.4% C 0.106 H 228.1°. Best body text is #000000 at 5.55:1 contrast (WCAG AA passes).

Color values

HEX	#278DB3
RGB	rgb(39, 141, 179)
HSL	hsl(196, 64%, 43%)
HSV	hsv(196, 78%, 70%)
CMYK	cmyk(78.2%, 21.2%, 0%, 29.8%)
CIE-LAB	lab(54.80, -15.42, -28.06)
CIE-LCH	lch(54.80, 32.02, 241.21°)
OKLab	oklab(60.38% -0.0707 -0.0789)
OKLCH	oklch(60.38% 0.106 228.1)
XYZ	xyz(18.4949, 22.7335, 46.0523)
Luminance	0.2274 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#278DB3 #B34D27

analogous

#27B393 #278DB3 #2747B3

triadic

#278DB3 #B3278D #8DB327

tetradic

#278DB3 #9327B3 #B34D27 #47B327

square

#278DB3 #9327B3 #B34D27 #47B327

split-complementary

#278DB3 #B32747 #B39327

monochromatic

#113E4E #1C6581 #278DB3 #41ADD6 #74C3E1

Accessibility & contrast

On white

3.79

#278DB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.55

#278DB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #278DB3

5.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##278DB3	#FFFFFF	#000000	##000000
##278DB3	1.00	3.79	5.55	5.55
#FFFFFF	3.79	1.00	21.00	21.00
#000000	5.55	21.00	1.00	1.00
##000000	5.55	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#798BB5

Deuteranopia (green-blind)

#667DB2

Tritanopia (blue-blind)

#00989A

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #278db3;
/* rgb */ color: rgb(39, 141, 179);
/* oklch */ color: oklch(60.4% 0.106 228.1);

Tailwind

colors: {
  custom: {
    50: '#77aeca',
    500: '#278db3',
    950: '#000000',
  },
}

SCSS

$custom: #278db3;
$custom-light: #77aeca;
$custom-dark: #000000;

JSON

{
  "hex": "#278db3",
  "rgb": {
    "r": 39,
    "g": 141,
    "b": 179
  },
  "hsl": {
    "h": 196.286,
    "s": 64.22,
    "l": 42.745
  },
  "oklch": {
    "l": 0.60375,
    "c": 0.1059,
    "h": 228.1
  },
  "luminance": 0.22736
}

Semantic roles & 50–950 ramp

primary

#278DB3

secondary

#C8866E

accent

#6E41E7

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #278DB3

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

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