#3F83CB#3F83CB

#3F83CB is a mid, vivid cyan. Relative luminance 0.216; OKLCH L 60.0% C 0.130 H 252.0°. Best body text is #000000 at 5.32:1 contrast (WCAG AA passes).

Color values

HEX	#3F83CB
RGB	rgb(63, 131, 203)
HSL	hsl(211, 57%, 52%)
HSV	hsv(211, 69%, 80%)
CMYK	cmyk(69%, 35.5%, 0%, 20.4%)
CIE-LAB	lab(53.60, 2.00, -43.56)
CIE-LCH	lch(53.60, 43.61, 272.62°)
OKLab	oklab(59.98% -0.0402 -0.1237)
OKLCH	oklch(59.98% 0.13 252)
XYZ	xyz(20.9417, 21.5989, 59.5537)
Luminance	0.2160 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F83CB #CB873F

analogous

#3FC9CB #3F83CB #413FCB

triadic

#3F83CB #CB3F83 #83CB3F

tetradic

#3F83CB #CB3FC9 #CB873F #3FCB41

square

#3F83CB #CB3FC9 #CB873F #3FCB41

split-complementary

#3F83CB #CB413F #C9CB3F

monochromatic

#1F4771 #2C65A1 #3F83CB #6FA2D8 #9FC1E5

Accessibility & contrast

On white

3.95

#3F83CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.32

#3F83CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F83CB

5.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F83CB	#FFFFFF	#000000	##000000
##3F83CB	1.00	3.95	5.32	5.32
#FFFFFF	3.95	1.00	21.00	21.00
#000000	5.32	21.00	1.00	1.00
##000000	5.32	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6387CE

Deuteranopia (green-blind)

#4F7ACA

Tritanopia (blue-blind)

#00949D

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #3f83cb;
/* rgb */ color: rgb(63, 131, 203);
/* oklch */ color: oklch(60.0% 0.130 252.0);

Tailwind

colors: {
  custom: {
    50: '#83a6db',
    500: '#3f83cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f83cb;
$custom-light: #83a6db;
$custom-dark: #000000;

JSON

{
  "hex": "#3f83cb",
  "rgb": {
    "r": 63,
    "g": 131,
    "b": 203
  },
  "hsl": {
    "h": 210.857,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.5998,
    "c": 0.13012,
    "h": 252
  },
  "luminance": 0.21601
}

Semantic roles & 50–950 ramp

primary

#3F83CB

secondary

#D1B494

accent

#9647E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3F83CB

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

Preview Lab → · Contrast checker → · Palette generator →