#3F73BA#3F73BA

#3F73BA is a mid, vivid cyan. Relative luminance 0.169; OKLCH L 55.4% C 0.124 H 256.7°. Best body text is #FFFFFF at 4.80:1 contrast (WCAG AA passes).

Color values

HEX	#3F73BA
RGB	rgb(63, 115, 186)
HSL	hsl(215, 49%, 49%)
HSV	hsv(215, 66%, 73%)
CMYK	cmyk(66.1%, 38.2%, 0%, 27.1%)
CIE-LAB	lab(48.09, 5.71, -42.57)
CIE-LCH	lch(48.09, 42.95, 277.64°)
OKLab	oklab(55.38% -0.0286 -0.121)
OKLCH	oklch(55.38% 0.124 256.7)
XYZ	xyz(17.0404, 16.8617, 48.8015)
Luminance	0.1686 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F73BA #BA863F

analogous

#3FB1BA #3F73BA #483FBA

triadic

#3F73BA #BA3F73 #73BA3F

tetradic

#3F73BA #BA3FB1 #BA863F #3FBA48

square

#3F73BA #BA3FB1 #BA863F #3FBA48

split-complementary

#3F73BA #BA483F #B1BA3F

monochromatic

#203A5F #30578C #3F73BA #6A93CC #97B4DC

Accessibility & contrast

On white

4.80

#3F73BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.37

#3F73BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F73BA

4.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F73BA	#FFFFFF	#000000	##FFFFFF
##3F73BA	1.00	4.80	4.37	4.80
#FFFFFF	4.80	1.00	21.00	1.00
#000000	4.37	21.00	1.00	21.00
##FFFFFF	4.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5378BD

Deuteranopia (green-blind)

#426DB9

Tritanopia (blue-blind)

#00838D

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3f73ba;
/* rgb */ color: rgb(63, 115, 186);
/* oklch */ color: oklch(55.4% 0.124 256.7);

Tailwind

colors: {
  custom: {
    50: '#819acf',
    500: '#3f73ba',
    950: '#000000',
  },
}

SCSS

$custom: #3f73ba;
$custom-light: #819acf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f73ba",
  "rgb": {
    "r": 63,
    "g": 115,
    "b": 186
  },
  "hsl": {
    "h": 214.634,
    "s": 49.398,
    "l": 48.824
  },
  "oklch": {
    "l": 0.55384,
    "c": 0.12436,
    "h": 256.7
  },
  "luminance": 0.16863
}

Semantic roles & 50–950 ramp

primary

#3F73BA

secondary

#C8AF8D

accent

#9F4FD9

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3F73BA

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

Preview Lab → · Contrast checker → · Palette generator →