#3873D9#3873D9

#3873D9 is a mid, vivid blue. Relative luminance 0.181; OKLCH L 57.1% C 0.168 H 260.5°. Best body text is #000000 at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#3873D9
RGB	rgb(56, 115, 217)
HSL	hsl(218, 68%, 54%)
HSV	hsv(218, 74%, 85%)
CMYK	cmyk(74.2%, 47%, 0%, 14.9%)
CIE-LAB	lab(49.63, 15.90, -57.85)
CIE-LCH	lch(49.63, 60.00, 285.37°)
OKLab	oklab(57.09% -0.0277 -0.166)
OKLCH	oklch(57.09% 0.168 260.5)
XYZ	xyz(20.2815, 18.1097, 68.0588)
Luminance	0.1811 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3873D9 #D99E38

analogous

#38C4D9 #3873D9 #4D38D9

triadic

#3873D9 #D93873 #73D938

tetradic

#3873D9 #D938C4 #D99E38 #38D94D

square

#3873D9 #D938C4 #D99E38 #38D94D

split-complementary

#3873D9 #D94D38 #C4D938

monochromatic

#183E7E #2257B2 #3873D9 #6B97E3 #9FBBED

Accessibility & contrast

On white

4.54

#3873D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.62

#3873D9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3873D9

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3873D9	#FFFFFF	#000000	##000000
##3873D9	1.00	4.54	4.62	4.62
#FFFFFF	4.54	1.00	21.00	21.00
#000000	4.62	21.00	1.00	1.00
##000000	4.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B7EDD

Deuteranopia (green-blind)

#0D6FD7

Tritanopia (blue-blind)

#008B9B

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3873d9;
/* rgb */ color: rgb(56, 115, 217);
/* oklch */ color: oklch(57.1% 0.168 260.5);

Tailwind

colors: {
  custom: {
    50: '#849ae5',
    500: '#3873d9',
    950: '#000000',
  },
}

SCSS

$custom: #3873d9;
$custom-light: #849ae5;
$custom-dark: #000000;

JSON

{
  "hex": "#3873d9",
  "rgb": {
    "r": 56,
    "g": 115,
    "b": 217
  },
  "hsl": {
    "h": 218.012,
    "s": 67.932,
    "l": 53.529
  },
  "oklch": {
    "l": 0.57089,
    "c": 0.16832,
    "h": 260.5
  },
  "luminance": 0.18112
}

Semantic roles & 50–950 ramp

primary

#3873D9

secondary

#D9C094

accent

#AB3DEB

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3873D9

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

Preview Lab → · Contrast checker → · Palette generator →