#3973C7#3973C7

#3973C7 is a mid, vivid blue. Relative luminance 0.173; OKLCH L 55.9% C 0.144 H 257.9°. Best body text is #FFFFFF at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#3973C7
RGB	rgb(57, 115, 199)
HSL	hsl(215, 56%, 50%)
HSV	hsv(215, 71%, 78%)
CMYK	cmyk(71.4%, 42.2%, 0%, 22%)
CIE-LAB	lab(48.58, 9.44, -49.28)
CIE-LCH	lch(48.58, 50.17, 280.84°)
OKLab	oklab(55.94% -0.0302 -0.1408)
OKLCH	oklch(55.94% 0.144 257.9)
XYZ	xyz(18.1231, 17.2529, 56.3968)
Luminance	0.1726 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3973C7 #C78D39

analogous

#39BAC7 #3973C7 #4639C7

triadic

#3973C7 #C73973 #73C739

tetradic

#3973C7 #C739BA #C78D39 #39C746

square

#3973C7 #C739BA #C78D39 #39C746

split-complementary

#3973C7 #C74639 #BAC739

monochromatic

#1D3C68 #2B5798 #3973C7 #6995D4 #98B6E2

Accessibility & contrast

On white

4.72

#3973C7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.45

#3973C7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3973C7

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3973C7	#FFFFFF	#000000	##FFFFFF
##3973C7	1.00	4.72	4.45	4.72
#FFFFFF	4.72	1.00	21.00	1.00
#000000	4.45	21.00	1.00	21.00
##FFFFFF	4.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B7ACA

Deuteranopia (green-blind)

#326DC5

Tritanopia (blue-blind)

#008793

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3973c7;
/* rgb */ color: rgb(57, 115, 199);
/* oklch */ color: oklch(55.9% 0.144 257.9);

Tailwind

colors: {
  custom: {
    50: '#809ad8',
    500: '#3973c7',
    950: '#000000',
  },
}

SCSS

$custom: #3973c7;
$custom-light: #809ad8;
$custom-dark: #000000;

JSON

{
  "hex": "#3973c7",
  "rgb": {
    "r": 57,
    "g": 115,
    "b": 199
  },
  "hsl": {
    "h": 215.493,
    "s": 55.906,
    "l": 50.196
  },
  "oklch": {
    "l": 0.55937,
    "c": 0.14401,
    "h": 257.9
  },
  "luminance": 0.17255
}

Semantic roles & 50–950 ramp

primary

#3973C7

secondary

#CEB48E

accent

#A249DF

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E14

muted

#7D7E83

Preview Lab

Preview with #3973C7

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

Preview Lab → · Contrast checker → · Palette generator →