#3873D7#3873D7

#3873D7 is a mid, vivid blue. Relative luminance 0.180; OKLCH L 57.0% C 0.166 H 260.3°. Best body text is #000000 at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#3873D7
RGB	rgb(56, 115, 215)
HSL	hsl(218, 67%, 53%)
HSV	hsv(218, 74%, 84%)
CMYK	cmyk(74%, 46.5%, 0%, 15.7%)
CIE-LAB	lab(49.50, 15.16, -56.92)
CIE-LCH	lch(49.50, 58.90, 284.92°)
OKLab	oklab(56.95% -0.028 -0.1633)
OKLCH	oklch(56.95% 0.166 260.3)
XYZ	xyz(20.0229, 18.0063, 66.6971)
Luminance	0.1801 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3873D7 #D79C38

analogous

#38C2D7 #3873D7 #4C38D7

triadic

#3873D7 #D73873 #73D738

tetradic

#3873D7 #D738C2 #D79C38 #38D74C

square

#3873D7 #D738C2 #D79C38 #38D74C

split-complementary

#3873D7 #D74C38 #C2D738

monochromatic

#193E7C #2357AF #3873D7 #6B97E1 #9EBBEB

Accessibility & contrast

On white

4.56

#3873D7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.60

#3873D7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3873D7

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3873D7	#FFFFFF	#000000	##000000
##3873D7	1.00	4.56	4.60	4.60
#FFFFFF	4.56	1.00	21.00	21.00
#000000	4.60	21.00	1.00	1.00
##000000	4.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D7DDB

Deuteranopia (green-blind)

#146FD5

Tritanopia (blue-blind)

#008B9A

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3873d7;
/* rgb */ color: rgb(56, 115, 215);
/* oklch */ color: oklch(57.0% 0.166 260.3);

Tailwind

colors: {
  custom: {
    50: '#839ae4',
    500: '#3873d7',
    950: '#000000',
  },
}

SCSS

$custom: #3873d7;
$custom-light: #839ae4;
$custom-dark: #000000;

JSON

{
  "hex": "#3873d7",
  "rgb": {
    "r": 56,
    "g": 115,
    "b": 215
  },
  "hsl": {
    "h": 217.736,
    "s": 66.527,
    "l": 53.137
  },
  "oklch": {
    "l": 0.56952,
    "c": 0.16567,
    "h": 260.3
  },
  "luminance": 0.18009
}

Semantic roles & 50–950 ramp

primary

#3873D7

secondary

#D8BE93

accent

#AA3EE9

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3873D7

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

Preview Lab → · Contrast checker → · Palette generator →