#3871CB#3871CB

#3871CB is a mid, vivid blue. Relative luminance 0.170; OKLCH L 55.7% C 0.152 H 259.3°. Best body text is #FFFFFF at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#3871CB
RGB	rgb(56, 113, 203)
HSL	hsl(217, 59%, 51%)
HSV	hsv(217, 72%, 80%)
CMYK	cmyk(72.4%, 44.3%, 0%, 20.4%)
CIE-LAB	lab(48.21, 12.01, -52.16)
CIE-LCH	lch(48.21, 53.52, 282.97°)
OKLab	oklab(55.72% -0.0283 -0.1493)
OKLCH	oklch(55.72% 0.152 259.3)
XYZ	xyz(18.3116, 16.9608, 58.7970)
Luminance	0.1696 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3871CB #CB9238

analogous

#38BACB #3871CB #4838CB

triadic

#3871CB #CB3871 #71CB38

tetradic

#3871CB #CB38BA #CB9238 #38CB48

square

#3871CB #CB38BA #CB9238 #38CB48

split-complementary

#3871CB #CB4838 #BACB38

monochromatic

#1C3B6C #29569D #3871CB #6994D8 #99B6E4

Accessibility & contrast

On white

4.78

#3871CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.39

#3871CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3871CB

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3871CB	#FFFFFF	#000000	##FFFFFF
##3871CB	1.00	4.78	4.39	4.78
#FFFFFF	4.78	1.00	21.00	1.00
#000000	4.39	21.00	1.00	21.00
##FFFFFF	4.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#447ACE

Deuteranopia (green-blind)

#276CC9

Tritanopia (blue-blind)

#008694

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3871cb;
/* rgb */ color: rgb(56, 113, 203);
/* oklch */ color: oklch(55.7% 0.152 259.3);

Tailwind

colors: {
  custom: {
    50: '#8199db',
    500: '#3871cb',
    950: '#000000',
  },
}

SCSS

$custom: #3871cb;
$custom-light: #8199db;
$custom-dark: #000000;

JSON

{
  "hex": "#3871cb",
  "rgb": {
    "r": 56,
    "g": 113,
    "b": 203
  },
  "hsl": {
    "h": 216.735,
    "s": 58.566,
    "l": 50.784
  },
  "oklch": {
    "l": 0.5572,
    "c": 0.15199,
    "h": 259.3
  },
  "luminance": 0.16963
}

Semantic roles & 50–950 ramp

primary

#3871CB

secondary

#D0B78F

accent

#A546E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3871CB

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

Preview Lab → · Contrast checker → · Palette generator →