#3973C8#3973C8

#3973C8 is a mid, vivid blue. Relative luminance 0.173; OKLCH L 56.0% C 0.145 H 258.1°. Best body text is #FFFFFF at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#3973C8
RGB	rgb(57, 115, 200)
HSL	hsl(216, 57%, 50%)
HSV	hsv(216, 72%, 78%)
CMYK	cmyk(71.5%, 42.5%, 0%, 21.6%)
CIE-LAB	lab(48.64, 9.80, -49.76)
CIE-LCH	lch(48.64, 50.71, 281.14°)
OKLab	oklab(56% -0.03 -0.1422)
OKLCH	oklch(56% 0.145 258.1)
XYZ	xyz(18.2396, 17.2995, 57.0103)
Luminance	0.1730 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3973C8 #C88E39

analogous

#39BBC8 #3973C8 #4639C8

triadic

#3973C8 #C83973 #73C839

tetradic

#3973C8 #C839BB #C88E39 #39C846

square

#3973C8 #C839BB #C88E39 #39C846

split-complementary

#3973C8 #C84639 #BBC839

monochromatic

#1D3C69 #2B5799 #3973C8 #6995D5 #99B7E3

Accessibility & contrast

On white

4.71

#3973C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.46

#3973C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3973C8

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3973C8	#FFFFFF	#000000	##FFFFFF
##3973C8	1.00	4.71	4.46	4.71
#FFFFFF	4.71	1.00	21.00	1.00
#000000	4.46	21.00	1.00	21.00
##FFFFFF	4.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A7BCB

Deuteranopia (green-blind)

#316DC6

Tritanopia (blue-blind)

#008794

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3973c8;
/* rgb */ color: rgb(57, 115, 200);
/* oklch */ color: oklch(56.0% 0.145 258.1);

Tailwind

colors: {
  custom: {
    50: '#819ad9',
    500: '#3973c8',
    950: '#000000',
  },
}

SCSS

$custom: #3973c8;
$custom-light: #819ad9;
$custom-dark: #000000;

JSON

{
  "hex": "#3973c8",
  "rgb": {
    "r": 57,
    "g": 115,
    "b": 200
  },
  "hsl": {
    "h": 215.664,
    "s": 56.522,
    "l": 50.392
  },
  "oklch": {
    "l": 0.56001,
    "c": 0.14535,
    "h": 258.1
  },
  "luminance": 0.17301
}

Semantic roles & 50–950 ramp

primary

#3973C8

secondary

#CEB48F

accent

#A248E0

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3973C8

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

Preview Lab → · Contrast checker → · Palette generator →