#3972CF#3972CF

#3972CF is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.2% C 0.156 H 259.7°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#3972CF
RGB	rgb(57, 114, 207)
HSL	hsl(217, 61%, 52%)
HSV	hsv(217, 72%, 81%)
CMYK	cmyk(72.5%, 44.9%, 0%, 18.8%)
CIE-LAB	lab(48.77, 12.99, -53.54)
CIE-LCH	lch(48.77, 55.10, 283.63°)
OKLab	oklab(56.24% -0.0278 -0.1534)
OKLCH	oklch(56.24% 0.156 259.7)
XYZ	xyz(18.9631, 17.4074, 61.3800)
Luminance	0.1741 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3972CF #CF9639

analogous

#39BDCF #3972CF #4B39CF

triadic

#3972CF #CF3972 #72CF39

tetradic

#3972CF #CF39BD #CF9639 #39CF4B

square

#3972CF #CF39BD #CF9639 #39CF4B

split-complementary

#3972CF #CF4B39 #BDCF39

monochromatic

#1C3C72 #2857A3 #3972CF #6A95DB #9CB8E7

Accessibility & contrast

On white

4.69

#3972CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.48

#3972CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3972CF

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3972CF	#FFFFFF	#000000	##FFFFFF
##3972CF	1.00	4.69	4.48	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.48	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#437BD3

Deuteranopia (green-blind)

#246DCD

Tritanopia (blue-blind)

#008896

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3972cf;
/* rgb */ color: rgb(57, 114, 207);
/* oklch */ color: oklch(56.2% 0.156 259.7);

Tailwind

colors: {
  custom: {
    50: '#8299de',
    500: '#3972cf',
    950: '#000000',
  },
}

SCSS

$custom: #3972cf;
$custom-light: #8299de;
$custom-dark: #000000;

JSON

{
  "hex": "#3972cf",
  "rgb": {
    "r": 57,
    "g": 114,
    "b": 207
  },
  "hsl": {
    "h": 217.2,
    "s": 60.976,
    "l": 51.765
  },
  "oklch": {
    "l": 0.56239,
    "c": 0.15587,
    "h": 259.7
  },
  "luminance": 0.17409
}

Semantic roles & 50–950 ramp

primary

#3972CF

secondary

#D3BA91

accent

#A744E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3972CF

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

Preview Lab → · Contrast checker → · Palette generator →