#278AB3#278AB3

#278AB3 is a mid, moderate cyan. Relative luminance 0.219; OKLCH L 59.6% C 0.107 H 230.8°. Best body text is #000000 at 5.37:1 contrast (WCAG AA passes).

Color values

HEX	#278AB3
RGB	rgb(39, 138, 179)
HSL	hsl(198, 64%, 43%)
HSV	hsv(198, 78%, 70%)
CMYK	cmyk(78.2%, 22.9%, 0%, 29.8%)
CIE-LAB	lab(53.88, -13.76, -29.49)
CIE-LCH	lch(53.88, 32.54, 244.99°)
OKLab	oklab(59.64% -0.0678 -0.083)
OKLCH	oklch(59.64% 0.107 230.8)
XYZ	xyz(18.0586, 21.8608, 45.9069)
Luminance	0.2186 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#278AB3 #B35027

analogous

#27B396 #278AB3 #2744B3

triadic

#278AB3 #B3278A #8AB327

tetradic

#278AB3 #9627B3 #B35027 #44B327

square

#278AB3 #9627B3 #B35027 #44B327

split-complementary

#278AB3 #B32744 #B39627

monochromatic

#113D4E #1C6381 #278AB3 #41AAD6 #74C1E1

Accessibility & contrast

On white

3.91

#278AB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.37

#278AB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #278AB3

5.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##278AB3	#FFFFFF	#000000	##000000
##278AB3	1.00	3.91	5.37	5.37
#FFFFFF	3.91	1.00	21.00	21.00
#000000	5.37	21.00	1.00	1.00
##000000	5.37	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7588B5

Deuteranopia (green-blind)

#627BB2

Tritanopia (blue-blind)

#009598

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #278ab3;
/* rgb */ color: rgb(39, 138, 179);
/* oklch */ color: oklch(59.6% 0.107 230.8);

Tailwind

colors: {
  custom: {
    50: '#77acca',
    500: '#278ab3',
    950: '#000000',
  },
}

SCSS

$custom: #278ab3;
$custom-light: #77acca;
$custom-dark: #000000;

JSON

{
  "hex": "#278ab3",
  "rgb": {
    "r": 39,
    "g": 138,
    "b": 179
  },
  "hsl": {
    "h": 197.571,
    "s": 64.22,
    "l": 42.745
  },
  "oklch": {
    "l": 0.59641,
    "c": 0.10714,
    "h": 230.8
  },
  "luminance": 0.21863
}

Semantic roles & 50–950 ramp

primary

#278AB3

secondary

#C8886E

accent

#7141E7

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #278AB3

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

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