#3870CF#3870CF

#3870CF is a mid, vivid blue. Relative luminance 0.169; OKLCH L 55.8% C 0.159 H 260.3°. Best body text is #FFFFFF at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#3870CF
RGB	rgb(56, 112, 207)
HSL	hsl(218, 61%, 52%)
HSV	hsv(218, 73%, 81%)
CMYK	cmyk(72.9%, 45.9%, 0%, 18.8%)
CIE-LAB	lab(48.17, 14.11, -54.50)
CIE-LCH	lch(48.17, 56.30, 284.51°)
OKLab	oklab(55.77% -0.0268 -0.1562)
OKLCH	oklch(55.77% 0.159 260.3)
XYZ	xyz(18.6835, 16.9320, 61.3029)
Luminance	0.1693 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3870CF #CF9738

analogous

#38BCCF #3870CF #4C38CF

triadic

#3870CF #CF3870 #70CF38

tetradic

#3870CF #CF38BC #CF9738 #38CF4C

square

#3870CF #CF38BC #CF9738 #38CF4C

split-complementary

#3870CF #CF4C38 #BCCF38

monochromatic

#1B3B71 #2755A3 #3870CF #6993DB #9BB7E7

Accessibility & contrast

On white

4.79

#3870CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.39

#3870CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3870CF

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3870CF	#FFFFFF	#000000	##FFFFFF
##3870CF	1.00	4.79	4.39	4.79
#FFFFFF	4.79	1.00	21.00	1.00
#000000	4.39	21.00	1.00	21.00
##FFFFFF	4.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E7AD3

Deuteranopia (green-blind)

#1C6CCD

Tritanopia (blue-blind)

#008695

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3870cf;
/* rgb */ color: rgb(56, 112, 207);
/* oklch */ color: oklch(55.8% 0.159 260.3);

Tailwind

colors: {
  custom: {
    50: '#8298de',
    500: '#3870cf',
    950: '#000000',
  },
}

SCSS

$custom: #3870cf;
$custom-light: #8298de;
$custom-dark: #000000;

JSON

{
  "hex": "#3870cf",
  "rgb": {
    "r": 56,
    "g": 112,
    "b": 207
  },
  "hsl": {
    "h": 217.748,
    "s": 61.134,
    "l": 51.569
  },
  "oklch": {
    "l": 0.5577,
    "c": 0.15851,
    "h": 260.3
  },
  "luminance": 0.16934
}

Semantic roles & 50–950 ramp

primary

#3870CF

secondary

#D3BA90

accent

#A944E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3870CF

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

Preview Lab → · Contrast checker → · Palette generator →