#3F72CF#3F72CF

#3F72CF is a mid, vivid blue. Relative luminance 0.176; OKLCH L 56.5% C 0.154 H 261.3°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#3F72CF
RGB	rgb(63, 114, 207)
HSL	hsl(219, 60%, 53%)
HSV	hsv(219, 70%, 81%)
CMYK	cmyk(69.6%, 44.9%, 0%, 18.8%)
CIE-LAB	lab(49.00, 13.84, -53.16)
CIE-LCH	lch(49.00, 54.93, 284.59°)
OKLab	oklab(56.48% -0.0233 -0.1521)
OKLCH	oklch(56.48% 0.154 261.3)
XYZ	xyz(19.3257, 17.5944, 61.3970)
Luminance	0.1760 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F72CF #CF9C3F

analogous

#3FBACF #3F72CF #543FCF

triadic

#3F72CF #CF3F72 #72CF3F

tetradic

#3F72CF #CF3FBA #CF9C3F #3FCF54

square

#3F72CF #CF3FBA #CF9C3F #3FCF54

split-complementary

#3F72CF #CF543F #BACF3F

monochromatic

#1E3D76 #2A56A7 #3F72CF #7096DB #A1BAE7

Accessibility & contrast

On white

4.65

#3F72CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.52

#3F72CF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F72CF

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F72CF	#FFFFFF	#000000	##FFFFFF
##3F72CF	1.00	4.65	4.52	4.65
#FFFFFF	4.65	1.00	21.00	1.00
#000000	4.52	21.00	1.00	21.00
##FFFFFF	4.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#437CD3

Deuteranopia (green-blind)

#286ECD

Tritanopia (blue-blind)

#008896

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f72cf;
/* rgb */ color: rgb(63, 114, 207);
/* oklch */ color: oklch(56.5% 0.154 261.3);

Tailwind

colors: {
  custom: {
    50: '#849ade',
    500: '#3f72cf',
    950: '#000000',
  },
}

SCSS

$custom: #3f72cf;
$custom-light: #849ade;
$custom-dark: #000000;

JSON

{
  "hex": "#3f72cf",
  "rgb": {
    "r": 63,
    "g": 114,
    "b": 207
  },
  "hsl": {
    "h": 218.75,
    "s": 60,
    "l": 52.941
  },
  "oklch": {
    "l": 0.56481,
    "c": 0.15393,
    "h": 261.3
  },
  "luminance": 0.17596
}

Semantic roles & 50–950 ramp

primary

#3F72CF

secondary

#D4BE96

accent

#AB45E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F72CF

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

Preview Lab → · Contrast checker → · Palette generator →