#3999CD#3999CD

#3999CD is a light, moderate cyan. Relative luminance 0.281; OKLCH L 65.0% C 0.117 H 236.5°. Best body text is #000000 at 6.61:1 contrast (WCAG AA passes).

Color values

HEX#3999CD
RGBrgb(57, 153, 205)
HSLhsl(201, 60%, 51%)
HSVhsv(201, 72%, 80%)
CMYKcmyk(72.2%, 25.4%, 0%, 19.6%)
CIE-LABlab(59.94, -10.89, -34.74)
CIE-LCHlch(59.94, 36.41, 252.60°)
OKLaboklab(64.96% -0.0647 -0.0979)
OKLCHoklch(64.96% 0.117 236.5)
XYZxyz(24.0937, 28.0574, 61.8916)
Luminance0.2806 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3999CD #CD6D39
analogous
#39CDB7 #3999CD #394FCD
triadic
#3999CD #CD3999 #99CD39
tetradic
#3999CD #B739CD #CD6D39 #4FCD39
square
#3999CD #B739CD #CD6D39 #4FCD39
split-complementary
#3999CD #CD394F #CDB739
monochromatic
#1C526F #2876A0 #3999CD #6AB2D9 #9BCBE6

Accessibility & contrast

On white

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

On black

6.61
#3999CD on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3999CD
6.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3999CD#FFFFFF#000000##000000
##3999CD1.003.186.616.61
#FFFFFF3.181.0021.0021.00
#0000006.6121.001.001.00
##0000006.6121.001.001.00

Color blindness preview

Protanopia (red-blind)
#8098CF
Deuteranopia (green-blind)
#6C8ACC
Tritanopia (blue-blind)
#00A6AB
Achromatopsia (no color)
#909090

Design tokens & code

CSS
--color: #3999cd;
/* rgb */ color: rgb(57, 153, 205);
/* oklch */ color: oklch(65.0% 0.117 236.5);
Tailwind
colors: {
  custom: {
    50: '#82b7dc',
    500: '#3999cd',
    950: '#000000',
  },
}
SCSS
$custom: #3999cd;
$custom-light: #82b7dc;
$custom-dark: #000000;
JSON
{
  "hex": "#3999cd",
  "rgb": {
    "r": 57,
    "g": 153,
    "b": 205
  },
  "hsl": {
    "h": 201.081,
    "s": 59.677,
    "l": 51.373
  },
  "oklch": {
    "l": 0.64964,
    "c": 0.11734,
    "h": 236.5
  },
  "luminance": 0.2806
}

Semantic roles & 50–950 ramp

primary
#3999CD
secondary
#D2A790
accent
#7C45E3
background
#F8FBFD
surface
#F0F6FB
border
#CBD0D4
text
#0C1115
muted
#7D8083

Preview Lab

Preview with #3999CD

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

Preview Lab → · Contrast checker → · Palette generator →

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