#3873CF#3873CF

#3873CF is a mid, vivid blue. Relative luminance 0.176; OKLCH L 56.4% C 0.155 H 259.1°. Best body text is #FFFFFF at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#3873CF
RGB	rgb(56, 115, 207)
HSL	hsl(217, 61%, 52%)
HSV	hsv(217, 73%, 81%)
CMYK	cmyk(72.9%, 44.4%, 0%, 18.8%)
CIE-LAB	lab(49.01, 12.23, -53.16)
CIE-LCH	lch(49.01, 54.54, 282.95°)
OKLab	oklab(56.42% -0.0294 -0.1522)
OKLCH	oklch(56.42% 0.155 259.1)
XYZ	xyz(19.0200, 17.6051, 61.4151)
Luminance	0.1761 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3873CF #CF9438

analogous

#38BFCF #3873CF #4938CF

triadic

#3873CF #CF3873 #73CF38

tetradic

#3873CF #CF38BF #CF9438 #38CF49

square

#3873CF #CF38BF #CF9438 #38CF49

split-complementary

#3873CF #CF4938 #BFCF38

monochromatic

#1B3D71 #2757A3 #3873CF #6996DB #9BB8E7

Accessibility & contrast

On white

4.64

#3873CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.52

#3873CF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3873CF

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3873CF	#FFFFFF	#000000	##FFFFFF
##3873CF	1.00	4.64	4.52	4.64
#FFFFFF	4.64	1.00	21.00	1.00
#000000	4.52	21.00	1.00	21.00
##FFFFFF	4.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#447CD3

Deuteranopia (green-blind)

#276ECD

Tritanopia (blue-blind)

#008997

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3873cf;
/* rgb */ color: rgb(56, 115, 207);
/* oklch */ color: oklch(56.4% 0.155 259.1);

Tailwind

colors: {
  custom: {
    50: '#829ade',
    500: '#3873cf',
    950: '#000000',
  },
}

SCSS

$custom: #3873cf;
$custom-light: #829ade;
$custom-dark: #000000;

JSON

{
  "hex": "#3873cf",
  "rgb": {
    "r": 56,
    "g": 115,
    "b": 207
  },
  "hsl": {
    "h": 216.556,
    "s": 61.134,
    "l": 51.569
  },
  "oklch": {
    "l": 0.56417,
    "c": 0.15503,
    "h": 259.1
  },
  "luminance": 0.17607
}

Semantic roles & 50–950 ramp

primary

#3873CF

secondary

#D3B990

accent

#A544E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3873CF

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

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