#3873D3#3873D3

#3873D3 is a mid, vivid blue. Relative luminance 0.178; OKLCH L 56.7% C 0.160 H 259.7°. Best body text is #FFFFFF at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#3873D3
RGB	rgb(56, 115, 211)
HSL	hsl(217, 64%, 52%)
HSV	hsv(217, 73%, 83%)
CMYK	cmyk(73.5%, 45.5%, 0%, 17.3%)
CIE-LAB	lab(49.26, 13.69, -55.04)
CIE-LCH	lch(49.26, 56.72, 283.97°)
OKLab	oklab(56.68% -0.0287 -0.1578)
OKLCH	oklch(56.68% 0.16 259.7)
XYZ	xyz(19.5152, 17.8032, 64.0232)
Luminance	0.1781 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3873D3 #D39838

analogous

#38C1D3 #3873D3 #4A38D3

triadic

#3873D3 #D33873 #73D338

tetradic

#3873D3 #D338C1 #D39838 #38D34A

square

#3873D3 #D338C1 #D39838 #38D34A

split-complementary

#3873D3 #D34A38 #C1D338

monochromatic

#1A3D76 #2557A9 #3873D3 #6A96DE #9CBAE9

Accessibility & contrast

On white

4.60

#3873D3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#3873D3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3873D3

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3873D3	#FFFFFF	#000000	##FFFFFF
##3873D3	1.00	4.60	4.56	4.60
#FFFFFF	4.60	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#417DD7

Deuteranopia (green-blind)

#1F6ED1

Tritanopia (blue-blind)

#008A99

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3873d3;
/* rgb */ color: rgb(56, 115, 211);
/* oklch */ color: oklch(56.7% 0.160 259.7);

Tailwind

colors: {
  custom: {
    50: '#829ae1',
    500: '#3873d3',
    950: '#000000',
  },
}

SCSS

$custom: #3873d3;
$custom-light: #829ae1;
$custom-dark: #000000;

JSON

{
  "hex": "#3873d3",
  "rgb": {
    "r": 56,
    "g": 115,
    "b": 211
  },
  "hsl": {
    "h": 217.161,
    "s": 63.786,
    "l": 52.353
  },
  "oklch": {
    "l": 0.56683,
    "c": 0.16035,
    "h": 259.7
  },
  "luminance": 0.17805
}

Semantic roles & 50–950 ramp

primary

#3873D3

secondary

#D5BB92

accent

#A841E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3873D3

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

Preview Lab → · Contrast checker → · Palette generator →