#3F99DC#3F99DC

#3F99DC is a light, vivid cyan. Relative luminance 0.290; OKLCH L 65.9% C 0.131 H 244.4°. Best body text is #000000 at 6.80:1 contrast (WCAG AA passes).

Color values

HEX#3F99DC
RGBrgb(63, 153, 220)
HSLhsl(206, 69%, 55%)
HSVhsv(206, 71%, 86%)
CMYKcmyk(71.4%, 30.5%, 0%, 13.7%)
CIE-LABlab(60.78, -4.93, -41.78)
CIE-LCHlch(60.78, 42.07, 263.28°)
OKLaboklab(65.9% -0.0567 -0.1183)
OKLCHoklch(65.9% 0.131 244.4)
XYZxyz(26.3544, 29.0036, 71.9056)
Luminance0.2901 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3F99DC #DC823F
analogous
#3FDCD0 #3F99DC #3F4ADC
triadic
#3F99DC #DC3F99 #99DC3F
tetradic
#3F99DC #D03FDC #DC823F #4ADC3F
square
#3F99DC #D03FDC #DC823F #4ADC3F
split-complementary
#3F99DC #DC3F4A #DCD03F
monochromatic
#195888 #227ABC #3F99DC #73B4E5 #A7D0EF

Accessibility & contrast

On white

3.09
#3F99DC on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.80
#3F99DC on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F99DC
6.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3F99DC#FFFFFF#000000##000000
##3F99DC1.003.096.806.80
#FFFFFF3.091.0021.0021.00
#0000006.8021.001.001.00
##0000006.8021.001.001.00

Color blindness preview

Protanopia (red-blind)
#7A9BDF
Deuteranopia (green-blind)
#658CDB
Tritanopia (blue-blind)
#00A9B1
Achromatopsia (no color)
#939393

Design tokens & code

CSS
--color: #3f99dc;
/* rgb */ color: rgb(63, 153, 220);
/* oklch */ color: oklch(65.9% 0.131 244.4);
Tailwind
colors: {
  custom: {
    50: '#87b6e7',
    500: '#3f99dc',
    950: '#000000',
  },
}
SCSS
$custom: #3f99dc;
$custom-light: #87b6e7;
$custom-dark: #000000;
JSON
{
  "hex": "#3f99dc",
  "rgb": {
    "r": 63,
    "g": 153,
    "b": 220
  },
  "hsl": {
    "h": 205.605,
    "s": 69.163,
    "l": 55.49
  },
  "oklch": {
    "l": 0.65903,
    "c": 0.13114,
    "h": 244.4
  },
  "luminance": 0.29007
}

Semantic roles & 50–950 ramp

primary
#3F99DC
secondary
#DCB79B
accent
#873CEC
background
#F9FBFE
surface
#F1F6FC
border
#CBD0D5
text
#0D1116
muted
#7E8084

Preview Lab

Preview with #3F99DC

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

Preview Lab → · Contrast checker → · Palette generator →

#3F99DC Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva