#3972CC#3972CC

#3972CC is a mid, vivid blue. Relative luminance 0.173; OKLCH L 56.0% C 0.152 H 259.2°. Best body text is #FFFFFF at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#3972CC
RGB	rgb(57, 114, 204)
HSL	hsl(217, 59%, 51%)
HSV	hsv(217, 72%, 80%)
CMYK	cmyk(72.1%, 44.1%, 0%, 20%)
CIE-LAB	lab(48.59, 11.89, -52.12)
CIE-LCH	lch(48.59, 53.46, 282.85°)
OKLab	oklab(56.04% -0.0283 -0.1492)
OKLCH	oklch(56.04% 0.152 259.2)
XYZ	xyz(18.5998, 17.2621, 59.4667)
Luminance	0.1726 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3972CC #CC9339

analogous

#39BBCC #3972CC #4939CC

triadic

#3972CC #CC3972 #72CC39

tetradic

#3972CC #CC39BB #CC9339 #39CC49

square

#3972CC #CC39BB #CC9339 #39CC49

split-complementary

#3972CC #CC4939 #BBCC39

monochromatic

#1C3C6E #29579F #3972CC #6A95D9 #9AB7E5

Accessibility & contrast

On white

4.72

#3972CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.45

#3972CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3972CC

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3972CC	#FFFFFF	#000000	##FFFFFF
##3972CC	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)

#457BCF

Deuteranopia (green-blind)

#296DCA

Tritanopia (blue-blind)

#008795

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3972cc;
/* rgb */ color: rgb(57, 114, 204);
/* oklch */ color: oklch(56.0% 0.152 259.2);

Tailwind

colors: {
  custom: {
    50: '#819adc',
    500: '#3972cc',
    950: '#000000',
  },
}

SCSS

$custom: #3972cc;
$custom-light: #819adc;
$custom-dark: #000000;

JSON

{
  "hex": "#3972cc",
  "rgb": {
    "r": 57,
    "g": 114,
    "b": 204
  },
  "hsl": {
    "h": 216.735,
    "s": 59.036,
    "l": 51.176
  },
  "oklch": {
    "l": 0.56041,
    "c": 0.15185,
    "h": 259.2
  },
  "luminance": 0.17264
}

Semantic roles & 50–950 ramp

primary

#3972CC

secondary

#D1B890

accent

#A546E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3972CC

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

Preview Lab → · Contrast checker → · Palette generator →