#3878D3#3878D3

#3878D3 is a mid, vivid blue. Relative luminance 0.190; OKLCH L 57.8% C 0.155 H 257.7°. Best body text is #000000 at 4.80:1 contrast (WCAG AA passes).

Color values

HEX	#3878D3
RGB	rgb(56, 120, 211)
HSL	hsl(215, 64%, 52%)
HSV	hsv(215, 73%, 83%)
CMYK	cmyk(73.5%, 43.1%, 0%, 17.3%)
CIE-LAB	lab(50.66, 10.58, -52.80)
CIE-LCH	lch(50.66, 53.85, 281.33°)
OKLab	oklab(57.77% -0.033 -0.1511)
OKLCH	oklch(57.77% 0.155 257.7)
XYZ	xyz(20.1009, 18.9746, 64.2185)
Luminance	0.1898 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3878D3 #D39338

analogous

#38C5D3 #3878D3 #4638D3

triadic

#3878D3 #D33878 #78D338

tetradic

#3878D3 #D338C5 #D39338 #38D346

square

#3878D3 #D338C5 #D39338 #38D346

split-complementary

#3878D3 #D34638 #C5D338

monochromatic

#1A4076 #255BA9 #3878D3 #6A9ADE #9CBCE9

Accessibility & contrast

On white

4.38

#3878D3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.80

#3878D3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3878D3

4.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3878D3	#FFFFFF	#000000	##000000
##3878D3	1.00	4.38	4.80	4.80
#FFFFFF	4.38	1.00	21.00	21.00
#000000	4.80	21.00	1.00	1.00
##000000	4.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B80D7

Deuteranopia (green-blind)

#2E72D1

Tritanopia (blue-blind)

#008D9B

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #3878d3;
/* rgb */ color: rgb(56, 120, 211);
/* oklch */ color: oklch(57.8% 0.155 257.7);

Tailwind

colors: {
  custom: {
    50: '#829ee1',
    500: '#3878d3',
    950: '#000000',
  },
}

SCSS

$custom: #3878d3;
$custom-light: #829ee1;
$custom-dark: #000000;

JSON

{
  "hex": "#3878d3",
  "rgb": {
    "r": 56,
    "g": 120,
    "b": 211
  },
  "hsl": {
    "h": 215.226,
    "s": 63.786,
    "l": 52.353
  },
  "oklch": {
    "l": 0.57765,
    "c": 0.15464,
    "h": 257.7
  },
  "luminance": 0.18977
}

Semantic roles & 50–950 ramp

primary

#3878D3

secondary

#D5B992

accent

#A241E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3878D3

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

Preview Lab → · Contrast checker → · Palette generator →