#3870C8#3870C8

#3870C8 is a mid, vivid blue. Relative luminance 0.166; OKLCH L 55.3% C 0.149 H 259.2°. Best body text is #FFFFFF at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#3870C8
RGB	rgb(56, 112, 200)
HSL	hsl(217, 57%, 50%)
HSV	hsv(217, 72%, 78%)
CMYK	cmyk(72%, 44%, 0%, 21.6%)
CIE-LAB	lab(47.75, 11.54, -51.18)
CIE-LCH	lch(47.75, 52.46, 282.70°)
OKLab	oklab(55.31% -0.028 -0.1465)
OKLCH	oklch(55.31% 0.149 259.2)
XYZ	xyz(17.8466, 16.5973, 56.8954)
Luminance	0.1660 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3870C8 #C89038

analogous

#38B8C8 #3870C8 #4838C8

triadic

#3870C8 #C83870 #70C838

tetradic

#3870C8 #C838B8 #C89038 #38C848

square

#3870C8 #C838B8 #C89038 #38C848

split-complementary

#3870C8 #C84838 #B8C838

monochromatic

#1D3A69 #2A5599 #3870C8 #6892D5 #98B5E3

Accessibility & contrast

On white

4.86

#3870C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.32

#3870C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3870C8

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3870C8	#FFFFFF	#000000	##FFFFFF
##3870C8	1.00	4.86	4.32	4.86
#FFFFFF	4.86	1.00	21.00	1.00
#000000	4.32	21.00	1.00	21.00
##FFFFFF	4.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4478CB

Deuteranopia (green-blind)

#296BC6

Tritanopia (blue-blind)

#008592

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3870c8;
/* rgb */ color: rgb(56, 112, 200);
/* oklch */ color: oklch(55.3% 0.149 259.2);

Tailwind

colors: {
  custom: {
    50: '#8098d9',
    500: '#3870c8',
    950: '#000000',
  },
}

SCSS

$custom: #3870c8;
$custom-light: #8098d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3870c8",
  "rgb": {
    "r": 56,
    "g": 112,
    "b": 200
  },
  "hsl": {
    "h": 216.667,
    "s": 56.693,
    "l": 50.196
  },
  "oklch": {
    "l": 0.55305,
    "c": 0.14911,
    "h": 259.2
  },
  "luminance": 0.16599
}

Semantic roles & 50–950 ramp

primary

#3870C8

secondary

#CEB58E

accent

#A548E0

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3870C8

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

Preview Lab → · Contrast checker → · Palette generator →