#399DDB#399DDB

#399DDB is a light, vivid cyan. Relative luminance 0.301; OKLCH L 66.6% C 0.129 H 240.3°. Best body text is #000000 at 7.02:1 contrast (WCAG AA passes).

Color values

HEX#399DDB
RGBrgb(57, 157, 219)
HSLhsl(203, 69%, 54%)
HSVhsv(203, 74%, 86%)
CMYKcmyk(74%, 28.3%, 0%, 14.1%)
CIE-LABlab(61.74, -8.32, -39.74)
CIE-LCHlch(61.74, 40.60, 258.17°)
OKLaboklab(66.6% -0.064 -0.1123)
OKLCHoklch(66.6% 0.129 240.3)
XYZxyz(26.5255, 30.0952, 71.4151)
Luminance0.3010 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#399DDB #DB7739
analogous
#39DBC8 #399DDB #394CDB
triadic
#399DDB #DB399D #9DDB39
tetradic
#399DDB #C839DB #DB7739 #4CDB39
square
#399DDB #C839DB #DB7739 #4CDB39
split-complementary
#399DDB #DB394C #DBC839
monochromatic
#185982 #217DB6 #399DDB #6DB7E4 #A1D0EE

Accessibility & contrast

On white

2.99
#399DDB on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

7.02
#399DDB on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #399DDB
7.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##399DDB#FFFFFF#000000##000000
##399DDB1.002.997.027.02
#FFFFFF2.991.0021.0021.00
#0000007.0221.001.001.00
##0000007.0221.001.001.00

Color blindness preview

Protanopia (red-blind)
#809EDE
Deuteranopia (green-blind)
#6A8EDA
Tritanopia (blue-blind)
#00ACB3
Achromatopsia (no color)
#959595

Design tokens & code

CSS
--color: #399ddb;
/* rgb */ color: rgb(57, 157, 219);
/* oklch */ color: oklch(66.6% 0.129 240.3);
Tailwind
colors: {
  custom: {
    50: '#84b9e6',
    500: '#399ddb',
    950: '#000000',
  },
}
SCSS
$custom: #399ddb;
$custom-light: #84b9e6;
$custom-dark: #000000;
JSON
{
  "hex": "#399ddb",
  "rgb": {
    "r": 57,
    "g": 157,
    "b": 219
  },
  "hsl": {
    "h": 202.963,
    "s": 69.231,
    "l": 54.118
  },
  "oklch": {
    "l": 0.66595,
    "c": 0.12928,
    "h": 240.3
  },
  "luminance": 0.30098
}

Semantic roles & 50–950 ramp

primary
#399DDB
secondary
#DAB095
accent
#7F3CEC
background
#F8FBFE
surface
#F0F6FC
border
#CBD0D5
text
#0C1116
muted
#7D8084

Preview Lab

Preview with #399DDB

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

Preview Lab → · Contrast checker → · Palette generator →

#399DDB Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva