#3F73CF#3F73CF

#3F73CF is a mid, vivid blue. Relative luminance 0.178; OKLCH L 56.7% C 0.153 H 260.9°. Best body text is #FFFFFF at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#3F73CF
RGB	rgb(63, 115, 207)
HSL	hsl(218, 60%, 53%)
HSV	hsv(218, 70%, 81%)
CMYK	cmyk(69.6%, 44.4%, 0%, 18.8%)
CIE-LAB	lab(49.28, 13.22, -52.72)
CIE-LCH	lch(49.28, 54.35, 284.07°)
OKLab	oklab(56.69% -0.0242 -0.1508)
OKLCH	oklch(56.69% 0.153 260.9)
XYZ	xyz(19.4391, 17.8212, 61.4348)
Luminance	0.1782 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F73CF #CF9B3F

analogous

#3FBBCF #3F73CF #533FCF

triadic

#3F73CF #CF3F73 #73CF3F

tetradic

#3F73CF #CF3FBB #CF9B3F #3FCF53

square

#3F73CF #CF3FBB #CF9B3F #3FCF53

split-complementary

#3F73CF #CF533F #BBCF3F

monochromatic

#1E3E76 #2A57A7 #3F73CF #7097DB #A1BAE7

Accessibility & contrast

On white

4.60

#3F73CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#3F73CF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3F73CF

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F73CF	#FFFFFF	#000000	##FFFFFF
##3F73CF	1.00	4.60	4.56	4.60
#FFFFFF	4.60	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#457CD3

Deuteranopia (green-blind)

#2A6FCD

Tritanopia (blue-blind)

#008897

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3f73cf;
/* rgb */ color: rgb(63, 115, 207);
/* oklch */ color: oklch(56.7% 0.153 260.9);

Tailwind

colors: {
  custom: {
    50: '#849ade',
    500: '#3f73cf',
    950: '#000000',
  },
}

SCSS

$custom: #3f73cf;
$custom-light: #849ade;
$custom-dark: #000000;

JSON

{
  "hex": "#3f73cf",
  "rgb": {
    "r": 63,
    "g": 115,
    "b": 207
  },
  "hsl": {
    "h": 218.333,
    "s": 60,
    "l": 52.941
  },
  "oklch": {
    "l": 0.56695,
    "c": 0.15275,
    "h": 260.9
  },
  "luminance": 0.17823
}

Semantic roles & 50–950 ramp

primary

#3F73CF

secondary

#D4BE96

accent

#AA45E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F73CF

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

Preview Lab → · Contrast checker → · Palette generator →