#3870C7#3870C7

#3870C7 is a mid, vivid blue. Relative luminance 0.166; OKLCH L 55.2% C 0.148 H 259.0°. Best body text is #FFFFFF at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#3870C7
RGB	rgb(56, 112, 199)
HSL	hsl(217, 56%, 50%)
HSV	hsv(217, 72%, 78%)
CMYK	cmyk(71.9%, 43.7%, 0%, 22%)
CIE-LAB	lab(47.69, 11.17, -50.70)
CIE-LCH	lch(47.69, 51.92, 282.42°)
OKLab	oklab(55.24% -0.0282 -0.1451)
OKLCH	oklch(55.24% 0.148 259)
XYZ	xyz(17.7301, 16.5507, 56.2819)
Luminance	0.1655 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3870C7 #C78F38

analogous

#38B8C7 #3870C7 #4738C7

triadic

#3870C7 #C73870 #70C738

tetradic

#3870C7 #C738B8 #C78F38 #38C747

square

#3870C7 #C738B8 #C78F38 #38C747

split-complementary

#3870C7 #C74738 #B8C738

monochromatic

#1D3A67 #2B5597 #3870C7 #6892D4 #98B5E2

Accessibility & contrast

On white

4.87

#3870C7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.31

#3870C7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3870C7

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3870C7	#FFFFFF	#000000	##FFFFFF
##3870C7	1.00	4.87	4.31	4.87
#FFFFFF	4.87	1.00	21.00	1.00
#000000	4.31	21.00	1.00	21.00
##FFFFFF	4.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4578CA

Deuteranopia (green-blind)

#2B6BC5

Tritanopia (blue-blind)

#008492

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3870c7;
/* rgb */ color: rgb(56, 112, 199);
/* oklch */ color: oklch(55.2% 0.148 259.0);

Tailwind

colors: {
  custom: {
    50: '#8098d8',
    500: '#3870c7',
    950: '#000000',
  },
}

SCSS

$custom: #3870c7;
$custom-light: #8098d8;
$custom-dark: #000000;

JSON

{
  "hex": "#3870c7",
  "rgb": {
    "r": 56,
    "g": 112,
    "b": 199
  },
  "hsl": {
    "h": 216.503,
    "s": 56.078,
    "l": 50
  },
  "oklch": {
    "l": 0.55239,
    "c": 0.14776,
    "h": 259
  },
  "luminance": 0.16553
}

Semantic roles & 50–950 ramp

primary

#3870C7

secondary

#CDB48D

accent

#A448DF

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0D14

muted

#7D7E83

Preview Lab

Preview with #3870C7

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

Preview Lab → · Contrast checker → · Palette generator →