#3878DF#3878DF

#3878DF is a mid, vivid blue. Relative luminance 0.196; OKLCH L 58.6% C 0.170 H 259.6°. Best body text is #000000 at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#3878DF
RGB	rgb(56, 120, 223)
HSL	hsl(217, 72%, 55%)
HSV	hsv(217, 75%, 87%)
CMYK	cmyk(74.9%, 46.2%, 0%, 12.5%)
CIE-LAB	lab(51.38, 14.98, -58.42)
CIE-LCH	lch(51.38, 60.31, 284.38°)
OKLab	oklab(58.56% -0.0308 -0.1676)
OKLCH	oklch(58.56% 0.17 259.6)
XYZ	xyz(21.6618, 19.5990, 72.4391)
Luminance	0.1960 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3878DF #DF9F38

analogous

#38CBDF #3878DF #4C38DF

triadic

#3878DF #DF3878 #78DF38

tetradic

#3878DF #DF38CB #DF9F38 #38DF4C

square

#3878DF #DF38CB #DF9F38 #38DF4C

split-complementary

#3878DF #DF4C38 #CBDF38

monochromatic

#164187 #1E5BBC #3878DF #6D9CE7 #A1C0F0

Accessibility & contrast

On white

4.27

#3878DF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.92

#3878DF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3878DF

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3878DF	#FFFFFF	#000000	##000000
##3878DF	1.00	4.27	4.92	4.92
#FFFFFF	4.27	1.00	21.00	21.00
#000000	4.92	21.00	1.00	1.00
##000000	4.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4183E3

Deuteranopia (green-blind)

#1673DD

Tritanopia (blue-blind)

#0090A1

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3878df;
/* rgb */ color: rgb(56, 120, 223);
/* oklch */ color: oklch(58.6% 0.170 259.6);

Tailwind

colors: {
  custom: {
    50: '#859eea',
    500: '#3878df',
    950: '#000000',
  },
}

SCSS

$custom: #3878df;
$custom-light: #859eea;
$custom-dark: #000000;

JSON

{
  "hex": "#3878df",
  "rgb": {
    "r": 56,
    "g": 120,
    "b": 223
  },
  "hsl": {
    "h": 217.006,
    "s": 72.294,
    "l": 54.706
  },
  "oklch": {
    "l": 0.58556,
    "c": 0.17043,
    "h": 259.6
  },
  "luminance": 0.19601
}

Semantic roles & 50–950 ramp

primary

#3878DF

secondary

#DDC296

accent

#A939EF

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #3878DF

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

Preview Lab → · Contrast checker → · Palette generator →