#3972CB#3972CB

#3972CB is a mid, vivid blue. Relative luminance 0.172; OKLCH L 56.0% C 0.151 H 259.1°. Best body text is #FFFFFF at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#3972CB
RGB	rgb(57, 114, 203)
HSL	hsl(217, 58%, 51%)
HSV	hsv(217, 72%, 80%)
CMYK	cmyk(71.9%, 43.8%, 0%, 20.4%)
CIE-LAB	lab(48.53, 11.52, -51.65)
CIE-LCH	lch(48.53, 52.91, 282.58°)
OKLab	oklab(55.98% -0.0285 -0.1478)
OKLCH	oklch(55.98% 0.151 259.1)
XYZ	xyz(18.4802, 17.2143, 58.8371)
Luminance	0.1722 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3972CB #CB9239

analogous

#39BBCB #3972CB #4939CB

triadic

#3972CB #CB3972 #72CB39

tetradic

#3972CB #CB39BB #CB9239 #39CB49

square

#3972CB #CB39BB #CB9239 #39CB49

split-complementary

#3972CB #CB4939 #BBCB39

monochromatic

#1D3C6D #29579D #3972CB #6995D8 #9AB7E4

Accessibility & contrast

On white

4.73

#3972CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#3972CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3972CB

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3972CB	#FFFFFF	#000000	##FFFFFF
##3972CB	1.00	4.73	4.44	4.73
#FFFFFF	4.73	1.00	21.00	1.00
#000000	4.44	21.00	1.00	21.00
##FFFFFF	4.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#467ACE

Deuteranopia (green-blind)

#2B6DC9

Tritanopia (blue-blind)

#008794

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3972cb;
/* rgb */ color: rgb(57, 114, 203);
/* oklch */ color: oklch(56.0% 0.151 259.1);

Tailwind

colors: {
  custom: {
    50: '#819adb',
    500: '#3972cb',
    950: '#000000',
  },
}

SCSS

$custom: #3972cb;
$custom-light: #819adb;
$custom-dark: #000000;

JSON

{
  "hex": "#3972cb",
  "rgb": {
    "r": 57,
    "g": 114,
    "b": 203
  },
  "hsl": {
    "h": 216.575,
    "s": 58.4,
    "l": 50.98
  },
  "oklch": {
    "l": 0.55976,
    "c": 0.15051,
    "h": 259.1
  },
  "luminance": 0.17216
}

Semantic roles & 50–950 ramp

primary

#3972CB

secondary

#D0B790

accent

#A546E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3972CB

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

Preview Lab → · Contrast checker → · Palette generator →