#3870D3#3870D3

#3870D3 is a mid, vivid blue. Relative luminance 0.171; OKLCH L 56.0% C 0.164 H 260.8°. Best body text is #FFFFFF at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#3870D3
RGB	rgb(56, 112, 211)
HSL	hsl(218, 64%, 52%)
HSV	hsv(218, 73%, 83%)
CMYK	cmyk(73.5%, 46.9%, 0%, 17.3%)
CIE-LAB	lab(48.42, 15.58, -56.38)
CIE-LCH	lch(48.42, 58.49, 285.45°)
OKLab	oklab(56.04% -0.0261 -0.1618)
OKLCH	oklch(56.04% 0.164 260.8)
XYZ	xyz(19.1787, 17.1301, 63.9111)
Luminance	0.1713 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3870D3 #D39B38

analogous

#38BDD3 #3870D3 #4E38D3

triadic

#3870D3 #D33870 #70D338

tetradic

#3870D3 #D338BD #D39B38 #38D34E

square

#3870D3 #D338BD #D39B38 #38D34E

split-complementary

#3870D3 #D34E38 #BDD338

monochromatic

#1A3C76 #2555A9 #3870D3 #6A94DE #9CB8E9

Accessibility & contrast

On white

4.74

#3870D3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.43

#3870D3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3870D3

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3870D3	#FFFFFF	#000000	##FFFFFF
##3870D3	1.00	4.74	4.43	4.74
#FFFFFF	4.74	1.00	21.00	1.00
#000000	4.43	21.00	1.00	21.00
##FFFFFF	4.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B7BD7

Deuteranopia (green-blind)

#116CD1

Tritanopia (blue-blind)

#008797

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3870d3;
/* rgb */ color: rgb(56, 112, 211);
/* oklch */ color: oklch(56.0% 0.164 260.8);

Tailwind

colors: {
  custom: {
    50: '#8398e1',
    500: '#3870d3',
    950: '#000000',
  },
}

SCSS

$custom: #3870d3;
$custom-light: #8398e1;
$custom-dark: #000000;

JSON

{
  "hex": "#3870d3",
  "rgb": {
    "r": 56,
    "g": 112,
    "b": 211
  },
  "hsl": {
    "h": 218.323,
    "s": 63.786,
    "l": 52.353
  },
  "oklch": {
    "l": 0.56042,
    "c": 0.16386,
    "h": 260.8
  },
  "luminance": 0.17132
}

Semantic roles & 50–950 ramp

primary

#3870D3

secondary

#D5BD92

accent

#AB41E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3870D3

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

Preview Lab → · Contrast checker → · Palette generator →