#3873C7#3873C7

#3873C7 is a mid, vivid blue. Relative luminance 0.172; OKLCH L 55.9% C 0.144 H 257.6°. Best body text is #FFFFFF at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#3873C7
RGB	rgb(56, 115, 199)
HSL	hsl(215, 56%, 50%)
HSV	hsv(215, 72%, 78%)
CMYK	cmyk(71.9%, 42.2%, 0%, 22%)
CIE-LAB	lab(48.54, 9.29, -49.34)
CIE-LCH	lch(48.54, 50.21, 280.67°)
OKLab	oklab(55.9% -0.0309 -0.141)
OKLCH	oklch(55.9% 0.144 257.6)
XYZ	xyz(18.0667, 17.2238, 56.3941)
Luminance	0.1723 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3873C7 #C78C38

analogous

#38BAC7 #3873C7 #4538C7

triadic

#3873C7 #C73873 #73C738

tetradic

#3873C7 #C738BA #C78C38 #38C745

square

#3873C7 #C738BA #C78C38 #38C745

split-complementary

#3873C7 #C74538 #BAC738

monochromatic

#1D3C67 #2B5797 #3873C7 #6895D4 #98B6E2

Accessibility & contrast

On white

4.72

#3873C7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.45

#3873C7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3873C7

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3873C7	#FFFFFF	#000000	##FFFFFF
##3873C7	1.00	4.72	4.45	4.72
#FFFFFF	4.72	1.00	21.00	1.00
#000000	4.45	21.00	1.00	21.00
##FFFFFF	4.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B7ACA

Deuteranopia (green-blind)

#326DC5

Tritanopia (blue-blind)

#008793

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3873c7;
/* rgb */ color: rgb(56, 115, 199);
/* oklch */ color: oklch(55.9% 0.144 257.6);

Tailwind

colors: {
  custom: {
    50: '#809ad8',
    500: '#3873c7',
    950: '#000000',
  },
}

SCSS

$custom: #3873c7;
$custom-light: #809ad8;
$custom-dark: #000000;

JSON

{
  "hex": "#3873c7",
  "rgb": {
    "r": 56,
    "g": 115,
    "b": 199
  },
  "hsl": {
    "h": 215.245,
    "s": 56.078,
    "l": 50
  },
  "oklch": {
    "l": 0.55899,
    "c": 0.14435,
    "h": 257.6
  },
  "luminance": 0.17226
}

Semantic roles & 50–950 ramp

primary

#3873C7

secondary

#CDB38D

accent

#A148DF

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E14

muted

#7D7E83

Preview Lab

Preview with #3873C7

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

Preview Lab → · Contrast checker → · Palette generator →