#3878AB#3878AB

#3878AB is a mid, moderate cyan. Relative luminance 0.172; OKLCH L 55.4% C 0.103 H 245.3°. Best body text is #FFFFFF at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#3878AB
RGB	rgb(56, 120, 171)
HSL	hsl(207, 51%, 45%)
HSV	hsv(207, 67%, 67%)
CMYK	cmyk(67.3%, 29.8%, 0%, 32.9%)
CIE-LAB	lab(48.53, -3.82, -33.19)
CIE-LCH	lch(48.53, 33.41, 263.44°)
OKLab	oklab(55.41% -0.0431 -0.0937)
OKLCH	oklch(55.41% 0.103 245.3)
XYZ	xyz(15.6953, 17.2123, 41.0153)
Luminance	0.1721 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3878AB #AB6B38

analogous

#38ABA5 #3878AB #383EAB

triadic

#3878AB #AB3878 #78AB38

tetradic

#3878AB #A538AB #AB6B38 #3EAB38

square

#3878AB #A538AB #AB6B38 #3EAB38

split-complementary

#3878AB #AB383E #ABA538

monochromatic

#1A374F #29587D #3878AB #5896C8 #86B3D7

Accessibility & contrast

On white

4.73

#3878AB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#3878AB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3878AB

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3878AB	#FFFFFF	#000000	##FFFFFF
##3878AB	1.00	4.73	4.44	4.73
#FFFFFF	4.73	1.00	21.00	1.00
#000000	4.44	21.00	1.00	21.00
##FFFFFF	4.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6179AD

Deuteranopia (green-blind)

#526EAA

Tritanopia (blue-blind)

#00848A

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3878ab;
/* rgb */ color: rgb(56, 120, 171);
/* oklch */ color: oklch(55.4% 0.103 245.3);

Tailwind

colors: {
  custom: {
    50: '#7b9ec4',
    500: '#3878ab',
    950: '#000000',
  },
}

SCSS

$custom: #3878ab;
$custom-light: #7b9ec4;
$custom-dark: #000000;

JSON

{
  "hex": "#3878ab",
  "rgb": {
    "r": 56,
    "g": 120,
    "b": 171
  },
  "hsl": {
    "h": 206.609,
    "s": 50.661,
    "l": 44.51
  },
  "oklch": {
    "l": 0.55405,
    "c": 0.10315,
    "h": 245.3
  },
  "luminance": 0.17214
}

Semantic roles & 50–950 ramp

primary

#3878AB

secondary

#C19C7D

accent

#8C4EDA

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0E12

muted

#7C7E81

Preview Lab

Preview with #3878AB

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

Preview Lab → · Contrast checker → · Palette generator →