#3999CC#3999CC

#3999CC is a light, moderate cyan. Relative luminance 0.280; OKLCH L 64.9% C 0.116 H 236.0°. Best body text is #000000 at 6.60:1 contrast (WCAG AA passes).

Color values

HEX#3999CC
RGBrgb(57, 153, 204)
HSLhsl(201, 59%, 51%)
HSVhsv(201, 72%, 80%)
CMYKcmyk(72.1%, 25%, 0%, 20%)
CIE-LABlab(59.90, -11.23, -34.25)
CIE-LCHlch(59.90, 36.04, 251.85°)
OKLaboklab(64.92% -0.065 -0.0965)
OKLCHoklch(64.92% 0.116 236)
XYZxyz(23.9734, 28.0092, 61.2579)
Luminance0.2801 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3999CC #CC6C39
analogous
#39CCB5 #3999CC #394FCC
triadic
#3999CC #CC3999 #99CC39
tetradic
#3999CC #B539CC #CC6C39 #4FCC39
square
#3999CC #B539CC #CC6C39 #4FCC39
split-complementary
#3999CC #CC394F #CCB539
monochromatic
#1C526E #29769F #3999CC #6AB2D9 #9ACBE5

Accessibility & contrast

On white

3.18
#3999CC on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.60
#3999CC on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3999CC
6.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3999CC#FFFFFF#000000##000000
##3999CC1.003.186.606.60
#FFFFFF3.181.0021.0021.00
#0000006.6021.001.001.00
##0000006.6021.001.001.00

Color blindness preview

Protanopia (red-blind)
#8198CE
Deuteranopia (green-blind)
#6D8ACB
Tritanopia (blue-blind)
#00A6AA
Achromatopsia (no color)
#909090

Design tokens & code

CSS
--color: #3999cc;
/* rgb */ color: rgb(57, 153, 204);
/* oklch */ color: oklch(64.9% 0.116 236.0);
Tailwind
colors: {
  custom: {
    50: '#82b7db',
    500: '#3999cc',
    950: '#000000',
  },
}
SCSS
$custom: #3999cc;
$custom-light: #82b7db;
$custom-dark: #000000;
JSON
{
  "hex": "#3999cc",
  "rgb": {
    "r": 57,
    "g": 153,
    "b": 204
  },
  "hsl": {
    "h": 200.816,
    "s": 59.036,
    "l": 51.176
  },
  "oklch": {
    "l": 0.64915,
    "c": 0.11634,
    "h": 236
  },
  "luminance": 0.28012
}

Semantic roles & 50–950 ramp

primary
#3999CC
secondary
#D1A690
accent
#7C46E2
background
#F8FBFD
surface
#F0F6FB
border
#CBD0D4
text
#0C1115
muted
#7D8083

Preview Lab

Preview with #3999CC

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

Preview Lab → · Contrast checker → · Palette generator →

#3999CC Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva