#278BB3#278BB3

#278BB3 is a mid, moderate cyan. Relative luminance 0.222; OKLCH L 59.9% C 0.107 H 229.9°. Best body text is #000000 at 5.43:1 contrast (WCAG AA passes).

Color values

HEX	#278BB3
RGB	rgb(39, 139, 179)
HSL	hsl(197, 64%, 43%)
HSV	hsv(197, 78%, 70%)
CMYK	cmyk(78.2%, 22.3%, 0%, 29.8%)
CIE-LAB	lab(54.18, -14.31, -29.01)
CIE-LCH	lch(54.18, 32.35, 243.74°)
OKLab	oklab(59.89% -0.0687 -0.0816)
OKLCH	oklch(59.89% 0.107 229.9)
XYZ	xyz(18.2027, 22.1490, 45.9549)
Luminance	0.2215 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#278BB3 #B34F27

analogous

#27B395 #278BB3 #2745B3

triadic

#278BB3 #B3278B #8BB327

tetradic

#278BB3 #9527B3 #B34F27 #45B327

square

#278BB3 #9527B3 #B34F27 #45B327

split-complementary

#278BB3 #B32745 #B39527

monochromatic

#113D4E #1C6481 #278BB3 #41ABD6 #74C2E1

Accessibility & contrast

On white

3.87

#278BB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.43

#278BB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #278BB3

5.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##278BB3	#FFFFFF	#000000	##000000
##278BB3	1.00	3.87	5.43	5.43
#FFFFFF	3.87	1.00	21.00	21.00
#000000	5.43	21.00	1.00	1.00
##000000	5.43	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7689B5

Deuteranopia (green-blind)

#647CB2

Tritanopia (blue-blind)

#009698

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #278bb3;
/* rgb */ color: rgb(39, 139, 179);
/* oklch */ color: oklch(59.9% 0.107 229.9);

Tailwind

colors: {
  custom: {
    50: '#77adca',
    500: '#278bb3',
    950: '#000000',
  },
}

SCSS

$custom: #278bb3;
$custom-light: #77adca;
$custom-dark: #000000;

JSON

{
  "hex": "#278bb3",
  "rgb": {
    "r": 39,
    "g": 139,
    "b": 179
  },
  "hsl": {
    "h": 197.143,
    "s": 64.22,
    "l": 42.745
  },
  "oklch": {
    "l": 0.59885,
    "c": 0.10671,
    "h": 229.9
  },
  "luminance": 0.22151
}

Semantic roles & 50–950 ramp

primary

#278BB3

secondary

#C8886E

accent

#7041E7

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #278BB3

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

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