#3873D0#3873D0

#3873D0 is a mid, vivid blue. Relative luminance 0.177; OKLCH L 56.5% C 0.156 H 259.2°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#3873D0
RGB	rgb(56, 115, 208)
HSL	hsl(217, 62%, 52%)
HSV	hsv(217, 73%, 82%)
CMYK	cmyk(73.1%, 44.7%, 0%, 18.4%)
CIE-LAB	lab(49.07, 12.59, -53.63)
CIE-LCH	lch(49.07, 55.09, 283.21°)
OKLab	oklab(56.48% -0.0292 -0.1536)
OKLCH	oklch(56.48% 0.156 259.2)
XYZ	xyz(19.1427, 17.6542, 62.0610)
Luminance	0.1766 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3873D0 #D09538

analogous

#38BFD0 #3873D0 #4938D0

triadic

#3873D0 #D03873 #73D038

tetradic

#3873D0 #D038BF #D09538 #38D049

square

#3873D0 #D038BF #D09538 #38D049

split-complementary

#3873D0 #D04938 #BFD038

monochromatic

#1B3D73 #2757A4 #3873D0 #6A96DC #9BB9E7

Accessibility & contrast

On white

4.63

#3873D0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#3873D0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3873D0

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3873D0	#FFFFFF	#000000	##FFFFFF
##3873D0	1.00	4.63	4.53	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#447CD4

Deuteranopia (green-blind)

#256ECE

Tritanopia (blue-blind)

#008997

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3873d0;
/* rgb */ color: rgb(56, 115, 208);
/* oklch */ color: oklch(56.5% 0.156 259.2);

Tailwind

colors: {
  custom: {
    50: '#829adf',
    500: '#3873d0',
    950: '#000000',
  },
}

SCSS

$custom: #3873d0;
$custom-light: #829adf;
$custom-dark: #000000;

JSON

{
  "hex": "#3873d0",
  "rgb": {
    "r": 56,
    "g": 115,
    "b": 208
  },
  "hsl": {
    "h": 216.711,
    "s": 61.789,
    "l": 51.765
  },
  "oklch": {
    "l": 0.56483,
    "c": 0.15636,
    "h": 259.2
  },
  "luminance": 0.17656
}

Semantic roles & 50–950 ramp

primary

#3873D0

secondary

#D3B991

accent

#A643E5

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3873D0

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

Preview Lab → · Contrast checker → · Palette generator →