#3878CB#3878CB

#3878CB is a mid, vivid cyan. Relative luminance 0.186; OKLCH L 57.3% C 0.144 H 256.1°. Best body text is #000000 at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#3878CB
RGB	rgb(56, 120, 203)
HSL	hsl(214, 59%, 51%)
HSV	hsv(214, 72%, 80%)
CMYK	cmyk(72.4%, 40.9%, 0%, 20.4%)
CIE-LAB	lab(50.20, 7.65, -48.98)
CIE-LCH	lch(50.20, 49.58, 278.88°)
OKLab	oklab(57.26% -0.0346 -0.1399)
OKLCH	oklch(57.26% 0.144 256.1)
XYZ	xyz(19.1229, 18.5834, 59.0675)
Luminance	0.1858 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3878CB #CB8B38

analogous

#38C1CB #3878CB #4138CB

triadic

#3878CB #CB3878 #78CB38

tetradic

#3878CB #CB38C1 #CB8B38 #38CB41

square

#3878CB #CB38C1 #CB8B38 #38CB41

split-complementary

#3878CB #CB4138 #C1CB38

monochromatic

#1C3F6C #295B9D #3878CB #6999D8 #99BAE4

Accessibility & contrast

On white

4.45

#3878CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.72

#3878CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3878CB

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3878CB	#FFFFFF	#000000	##000000
##3878CB	1.00	4.45	4.72	4.72
#FFFFFF	4.45	1.00	21.00	21.00
#000000	4.72	21.00	1.00	1.00
##000000	4.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#517FCE

Deuteranopia (green-blind)

#3871C9

Tritanopia (blue-blind)

#008B97

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3878cb;
/* rgb */ color: rgb(56, 120, 203);
/* oklch */ color: oklch(57.3% 0.144 256.1);

Tailwind

colors: {
  custom: {
    50: '#819edb',
    500: '#3878cb',
    950: '#000000',
  },
}

SCSS

$custom: #3878cb;
$custom-light: #819edb;
$custom-dark: #000000;

JSON

{
  "hex": "#3878cb",
  "rgb": {
    "r": 56,
    "g": 120,
    "b": 203
  },
  "hsl": {
    "h": 213.878,
    "s": 58.566,
    "l": 50.784
  },
  "oklch": {
    "l": 0.57258,
    "c": 0.14409,
    "h": 256.1
  },
  "luminance": 0.18585
}

Semantic roles & 50–950 ramp

primary

#3878CB

secondary

#D0B48F

accent

#9E46E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3878CB

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

Preview Lab → · Contrast checker → · Palette generator →