#278BB1#278BB1

#278BB1 is a mid, moderate cyan. Relative luminance 0.221; OKLCH L 59.8% C 0.105 H 228.6°. Best body text is #000000 at 5.41:1 contrast (WCAG AA passes).

Color values

HEX	#278BB1
RGB	rgb(39, 139, 177)
HSL	hsl(197, 64%, 42%)
HSV	hsv(197, 78%, 69%)
CMYK	cmyk(78%, 21.5%, 0%, 30.6%)
CIE-LAB	lab(54.10, -15.01, -28.00)
CIE-LCH	lch(54.10, 31.77, 241.80°)
OKLab	oklab(59.79% -0.0695 -0.0787)
OKLCH	oklch(59.79% 0.105 228.6)
XYZ	xyz(18.0019, 22.0687, 44.8974)
Luminance	0.2207 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#278BB1 #B14D27

analogous

#27B192 #278BB1 #2746B1

triadic

#278BB1 #B1278B #8BB127

tetradic

#278BB1 #9227B1 #B14D27 #46B127

square

#278BB1 #9227B1 #B14D27 #46B127

split-complementary

#278BB1 #B12746 #B19227

monochromatic

#113C4D #1C647F #278BB1 #40ACD5 #72C2E0

Accessibility & contrast

On white

3.88

#278BB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.41

#278BB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #278BB1

5.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##278BB1	#FFFFFF	#000000	##000000
##278BB1	1.00	3.88	5.41	5.41
#FFFFFF	3.88	1.00	21.00	21.00
#000000	5.41	21.00	1.00	1.00
##000000	5.41	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7789B3

Deuteranopia (green-blind)

#657CB0

Tritanopia (blue-blind)

#009698

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #278bb1;
/* rgb */ color: rgb(39, 139, 177);
/* oklch */ color: oklch(59.8% 0.105 228.6);

Tailwind

colors: {
  custom: {
    50: '#77adc8',
    500: '#278bb1',
    950: '#000000',
  },
}

SCSS

$custom: #278bb1;
$custom-light: #77adc8;
$custom-dark: #000000;

JSON

{
  "hex": "#278bb1",
  "rgb": {
    "r": 39,
    "g": 139,
    "b": 177
  },
  "hsl": {
    "h": 196.522,
    "s": 63.889,
    "l": 42.353
  },
  "oklch": {
    "l": 0.59789,
    "c": 0.10497,
    "h": 228.6
  },
  "luminance": 0.22071
}

Semantic roles & 50–950 ramp

primary

#278BB1

secondary

#C7866D

accent

#6F41E7

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #278BB1

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

Preview Lab → · Contrast checker → · Palette generator →