#3973CC#3973CC

#3973CC is a mid, vivid blue. Relative luminance 0.175; OKLCH L 56.3% C 0.151 H 258.8°. Best body text is #FFFFFF at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#3973CC
RGB	rgb(57, 115, 204)
HSL	hsl(216, 59%, 51%)
HSV	hsv(216, 72%, 80%)
CMYK	cmyk(72.1%, 43.6%, 0%, 20%)
CIE-LAB	lab(48.87, 11.26, -51.67)
CIE-LCH	lch(48.87, 52.88, 282.30°)
OKLab	oklab(56.26% -0.0292 -0.1478)
OKLCH	oklch(56.26% 0.151 258.8)
XYZ	xyz(18.7132, 17.4889, 59.5045)
Luminance	0.1749 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3973CC #CC9239

analogous

#39BCCC #3973CC #4839CC

triadic

#3973CC #CC3973 #73CC39

tetradic

#3973CC #CC39BC #CC9239 #39CC48

square

#3973CC #CC39BC #CC9239 #39CC48

split-complementary

#3973CC #CC4839 #BCCC39

monochromatic

#1C3D6E #29579F #3973CC #6A95D9 #9AB8E5

Accessibility & contrast

On white

4.67

#3973CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.50

#3973CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3973CC

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3973CC	#FFFFFF	#000000	##FFFFFF
##3973CC	1.00	4.67	4.50	4.67
#FFFFFF	4.67	1.00	21.00	1.00
#000000	4.50	21.00	1.00	21.00
##FFFFFF	4.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#477BCF

Deuteranopia (green-blind)

#2C6ECA

Tritanopia (blue-blind)

#008895

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3973cc;
/* rgb */ color: rgb(57, 115, 204);
/* oklch */ color: oklch(56.3% 0.151 258.8);

Tailwind

colors: {
  custom: {
    50: '#819adc',
    500: '#3973cc',
    950: '#000000',
  },
}

SCSS

$custom: #3973cc;
$custom-light: #819adc;
$custom-dark: #000000;

JSON

{
  "hex": "#3973cc",
  "rgb": {
    "r": 57,
    "g": 115,
    "b": 204
  },
  "hsl": {
    "h": 216.327,
    "s": 59.036,
    "l": 51.176
  },
  "oklch": {
    "l": 0.56259,
    "c": 0.1507,
    "h": 258.8
  },
  "luminance": 0.17491
}

Semantic roles & 50–950 ramp

primary

#3973CC

secondary

#D1B790

accent

#A446E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3973CC

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

Preview Lab → · Contrast checker → · Palette generator →