#278BB0#278BB0

#278BB0 is a mid, moderate cyan. Relative luminance 0.220; OKLCH L 59.7% C 0.104 H 227.9°. Best body text is #000000 at 5.41:1 contrast (WCAG AA passes).

Color values

HEX	#278BB0
RGB	rgb(39, 139, 176)
HSL	hsl(196, 64%, 42%)
HSV	hsv(196, 78%, 69%)
CMYK	cmyk(77.8%, 21%, 0%, 31%)
CIE-LAB	lab(54.06, -15.36, -27.49)
CIE-LCH	lch(54.06, 31.49, 240.81°)
OKLab	oklab(59.74% -0.0699 -0.0772)
OKLCH	oklch(59.74% 0.104 227.9)
XYZ	xyz(17.9026, 22.0290, 44.3744)
Luminance	0.2203 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#278BB0 #B04C27

analogous

#27B090 #278BB0 #2747B0

triadic

#278BB0 #B0278B #8BB027

tetradic

#278BB0 #9027B0 #B04C27 #47B027

square

#278BB0 #9027B0 #B04C27 #47B027

split-complementary

#278BB0 #B02747 #B09027

monochromatic

#113C4C #1C637E #278BB0 #40ACD5 #72C2E0

Accessibility & contrast

On white

3.88

#278BB0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.41

#278BB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #278BB0

5.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##278BB0	#FFFFFF	#000000	##000000
##278BB0	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)

#7789B2

Deuteranopia (green-blind)

#657CB0

Tritanopia (blue-blind)

#009697

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #278bb0;
/* rgb */ color: rgb(39, 139, 176);
/* oklch */ color: oklch(59.7% 0.104 227.9);

Tailwind

colors: {
  custom: {
    50: '#77adc7',
    500: '#278bb0',
    950: '#000000',
  },
}

SCSS

$custom: #278bb0;
$custom-light: #77adc7;
$custom-dark: #000000;

JSON

{
  "hex": "#278bb0",
  "rgb": {
    "r": 39,
    "g": 139,
    "b": 176
  },
  "hsl": {
    "h": 196.204,
    "s": 63.721,
    "l": 42.157
  },
  "oklch": {
    "l": 0.59742,
    "c": 0.10414,
    "h": 227.9
  },
  "luminance": 0.22031
}

Semantic roles & 50–950 ramp

primary

#278BB0

secondary

#C7856C

accent

#6E41E7

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #278BB0

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

Preview Lab → · Contrast checker → · Palette generator →