#3F73B8#3F73B8

#3F73B8 is a mid, vivid cyan. Relative luminance 0.168; OKLCH L 55.3% C 0.122 H 256.2°. Best body text is #FFFFFF at 4.82:1 contrast (WCAG AA passes).

Color values

HEX	#3F73B8
RGB	rgb(63, 115, 184)
HSL	hsl(214, 49%, 48%)
HSV	hsv(214, 66%, 72%)
CMYK	cmyk(65.8%, 37.5%, 0%, 27.8%)
CIE-LAB	lab(47.98, 5.00, -41.58)
CIE-LCH	lch(47.98, 41.88, 276.85°)
OKLab	oklab(55.27% -0.0291 -0.1181)
OKLCH	oklch(55.27% 0.122 256.2)
XYZ	xyz(16.8292, 16.7773, 47.6895)
Luminance	0.1678 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F73B8 #B8843F

analogous

#3FAFB8 #3F73B8 #473FB8

triadic

#3F73B8 #B83F73 #73B83F

tetradic

#3F73B8 #B83FAF #B8843F #3FB847

square

#3F73B8 #B83FAF #B8843F #3FB847

split-complementary

#3F73B8 #B8473F #AFB83F

monochromatic

#203A5D #2F578A #3F73B8 #6993CC #96B4DB

Accessibility & contrast

On white

4.82

#3F73B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.36

#3F73B8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F73B8

4.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F73B8	#FFFFFF	#000000	##FFFFFF
##3F73B8	1.00	4.82	4.36	4.82
#FFFFFF	4.82	1.00	21.00	1.00
#000000	4.36	21.00	1.00	21.00
##FFFFFF	4.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5578BB

Deuteranopia (green-blind)

#436DB7

Tritanopia (blue-blind)

#00838D

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3f73b8;
/* rgb */ color: rgb(63, 115, 184);
/* oklch */ color: oklch(55.3% 0.122 256.2);

Tailwind

colors: {
  custom: {
    50: '#809acd',
    500: '#3f73b8',
    950: '#000000',
  },
}

SCSS

$custom: #3f73b8;
$custom-light: #809acd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f73b8",
  "rgb": {
    "r": 63,
    "g": 115,
    "b": 184
  },
  "hsl": {
    "h": 214.215,
    "s": 48.988,
    "l": 48.431
  },
  "oklch": {
    "l": 0.55266,
    "c": 0.12167,
    "h": 256.2
  },
  "luminance": 0.16779
}

Semantic roles & 50–950 ramp

primary

#3F73B8

secondary

#C7AE8C

accent

#9E4FD9

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3F73B8

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

Preview Lab → · Contrast checker → · Palette generator →