#3878BB#3878BB

#3878BB is a mid, vivid cyan. Relative luminance 0.179; OKLCH L 56.3% C 0.123 H 251.8°. Best body text is #FFFFFF at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#3878BB
RGB	rgb(56, 120, 187)
HSL	hsl(211, 54%, 48%)
HSV	hsv(211, 70%, 73%)
CMYK	cmyk(70.1%, 35.8%, 0%, 26.7%)
CIE-LAB	lab(49.33, 1.86, -41.19)
CIE-LCH	lch(49.33, 41.24, 272.58°)
OKLab	oklab(56.29% -0.0385 -0.117)
OKLCH	oklch(56.29% 0.123 251.8)
XYZ	xyz(17.3137, 17.8597, 49.5389)
Luminance	0.1786 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3878BB #BB7B38

analogous

#38B9BB #3878BB #3A38BB

triadic

#3878BB #BB3878 #78BB38

tetradic

#3878BB #BB38B9 #BB7B38 #38BB3A

square

#3878BB #BB38B9 #BB7B38 #38BB3A

split-complementary

#3878BB #BB3A38 #B9BB38

monochromatic

#1C3C5D #2A5A8C #3878BB #6197D0 #90B6DE

Accessibility & contrast

On white

4.59

#3878BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.57

#3878BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3878BB

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3878BB	#FFFFFF	#000000	##FFFFFF
##3878BB	1.00	4.59	4.57	4.59
#FFFFFF	4.59	1.00	21.00	1.00
#000000	4.57	21.00	1.00	21.00
##FFFFFF	4.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A7CBE

Deuteranopia (green-blind)

#4770BA

Tritanopia (blue-blind)

#008891

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3878bb;
/* rgb */ color: rgb(56, 120, 187);
/* oklch */ color: oklch(56.3% 0.123 251.8);

Tailwind

colors: {
  custom: {
    50: '#7e9ed0',
    500: '#3878bb',
    950: '#000000',
  },
}

SCSS

$custom: #3878bb;
$custom-light: #7e9ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#3878bb",
  "rgb": {
    "r": 56,
    "g": 120,
    "b": 187
  },
  "hsl": {
    "h": 210.687,
    "s": 53.909,
    "l": 47.647
  },
  "oklch": {
    "l": 0.56295,
    "c": 0.12321,
    "h": 251.8
  },
  "luminance": 0.17862
}

Semantic roles & 50–950 ramp

primary

#3878BB

secondary

#C8A886

accent

#964BDD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3878BB

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

Preview Lab → · Contrast checker → · Palette generator →