#3F73AB#3F73AB

#3F73AB is a mid, moderate cyan. Relative luminance 0.163; OKLCH L 54.5% C 0.104 H 251.8°. Best body text is #FFFFFF at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#3F73AB
RGB	rgb(63, 115, 171)
HSL	hsl(211, 46%, 46%)
HSV	hsv(211, 63%, 67%)
CMYK	cmyk(63.2%, 32.7%, 0%, 32.9%)
CIE-LAB	lab(47.31, 0.45, -35.08)
CIE-LCH	lch(47.31, 35.08, 270.74°)
OKLab	oklab(54.53% -0.0325 -0.0992)
OKLCH	oklch(54.53% 0.104 251.8)
XYZ	xyz(15.5286, 16.2570, 40.8397)
Luminance	0.1626 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F73AB #AB773F

analogous

#3FA9AB #3F73AB #413FAB

triadic

#3F73AB #AB3F73 #73AB3F

tetradic

#3F73AB #AB3FA9 #AB773F #3FAB41

square

#3F73AB #AB3FA9 #AB773F #3FAB41

split-complementary

#3F73AB #AB413F #A9AB3F

monochromatic

#1E3752 #2F557E #3F73AB #6292C5 #8FB1D6

Accessibility & contrast

On white

4.94

#3F73AB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.25

#3F73AB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F73AB

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F73AB	#FFFFFF	#000000	##FFFFFF
##3F73AB	1.00	4.94	4.25	4.94
#FFFFFF	4.94	1.00	21.00	1.00
#000000	4.25	21.00	1.00	21.00
##FFFFFF	4.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B76AD

Deuteranopia (green-blind)

#4C6CAA

Tritanopia (blue-blind)

#008087

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3f73ab;
/* rgb */ color: rgb(63, 115, 171);
/* oklch */ color: oklch(54.5% 0.104 251.8);

Tailwind

colors: {
  custom: {
    50: '#7e9bc4',
    500: '#3f73ab',
    950: '#000000',
  },
}

SCSS

$custom: #3f73ab;
$custom-light: #7e9bc4;
$custom-dark: #000000;

JSON

{
  "hex": "#3f73ab",
  "rgb": {
    "r": 63,
    "g": 115,
    "b": 171
  },
  "hsl": {
    "h": 211.111,
    "s": 46.154,
    "l": 45.882
  },
  "oklch": {
    "l": 0.54525,
    "c": 0.10438,
    "h": 251.8
  },
  "luminance": 0.16259
}

Semantic roles & 50–950 ramp

primary

#3F73AB

secondary

#C1A485

accent

#9652D6

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E12

muted

#7C7E81

Preview Lab

Preview with #3F73AB

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

Preview Lab → · Contrast checker → · Palette generator →