#278CB3#278CB3

#278CB3 is a mid, moderate cyan. Relative luminance 0.224; OKLCH L 60.1% C 0.106 H 229.0°. Best body text is #000000 at 5.49:1 contrast (WCAG AA passes).

Color values

HEX	#278CB3
RGB	rgb(39, 140, 179)
HSL	hsl(197, 64%, 43%)
HSV	hsv(197, 78%, 70%)
CMYK	cmyk(78.2%, 21.8%, 0%, 29.8%)
CIE-LAB	lab(54.49, -14.87, -28.54)
CIE-LCH	lch(54.49, 32.18, 242.48°)
OKLab	oklab(60.13% -0.0697 -0.0802)
OKLCH	oklch(60.13% 0.106 229)
XYZ	xyz(18.3481, 22.4399, 46.0034)
Luminance	0.2244 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#278CB3 #B34E27

analogous

#27B394 #278CB3 #2746B3

triadic

#278CB3 #B3278C #8CB327

tetradic

#278CB3 #9427B3 #B34E27 #46B327

square

#278CB3 #9427B3 #B34E27 #46B327

split-complementary

#278CB3 #B32746 #B39427

monochromatic

#113D4E #1C6581 #278CB3 #41ACD6 #74C2E1

Accessibility & contrast

On white

3.83

#278CB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.49

#278CB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #278CB3

5.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##278CB3	#FFFFFF	#000000	##000000
##278CB3	1.00	3.83	5.49	5.49
#FFFFFF	3.83	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)

#788AB5

Deuteranopia (green-blind)

#657DB2

Tritanopia (blue-blind)

#009799

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #278cb3;
/* rgb */ color: rgb(39, 140, 179);
/* oklch */ color: oklch(60.1% 0.106 229.0);

Tailwind

colors: {
  custom: {
    50: '#77adca',
    500: '#278cb3',
    950: '#000000',
  },
}

SCSS

$custom: #278cb3;
$custom-light: #77adca;
$custom-dark: #000000;

JSON

{
  "hex": "#278cb3",
  "rgb": {
    "r": 39,
    "g": 140,
    "b": 179
  },
  "hsl": {
    "h": 196.714,
    "s": 64.22,
    "l": 42.745
  },
  "oklch": {
    "l": 0.6013,
    "c": 0.10628,
    "h": 229
  },
  "luminance": 0.22442
}

Semantic roles & 50–950 ramp

primary

#278CB3

secondary

#C8876E

accent

#6F41E7

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #278CB3

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

Preview Lab → · Contrast checker → · Palette generator →