#309DB4#309DB4

#309DB4 is a light, moderate cyan. Relative luminance 0.280; OKLCH L 64.6% C 0.101 H 215.1°. Best body text is #000000 at 6.61:1 contrast (WCAG AA passes).

Color values

HEX#309DB4
RGBrgb(48, 157, 180)
HSLhsl(190, 58%, 45%)
HSVhsv(190, 73%, 71%)
CMYKcmyk(73.3%, 12.8%, 0%, 29.4%)
CIE-LABlab(59.92, -22.54, -20.73)
CIE-LCHlch(59.92, 30.63, 222.61°)
OKLaboklab(64.55% -0.0823 -0.0578)
OKLCHoklch(64.55% 0.101 215.1)
XYZxyz(21.5106, 28.0351, 47.4488)
Luminance0.2804 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#309DB4 #B44730
analogous
#30B489 #309DB4 #305BB4
triadic
#309DB4 #B4309D #9DB430
tetradic
#309DB4 #8930B4 #B44730 #5BB430
square
#309DB4 #8930B4 #B44730 #5BB430
split-complementary
#309DB4 #B4305B #B48930
monochromatic
#164953 #237384 #309DB4 #51BAD1 #81CDDD

Accessibility & contrast

On white

3.18
#309DB4 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.61
#309DB4 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #309DB4
6.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##309DB4#FFFFFF#000000##000000
##309DB41.003.186.616.61
#FFFFFF3.181.0021.0021.00
#0000006.6121.001.001.00
##0000006.6121.001.001.00

Color blindness preview

Protanopia (red-blind)
#8D98B5
Deuteranopia (green-blind)
#7B8BB4
Tritanopia (blue-blind)
#00A6A4
Achromatopsia (no color)
#909090

Design tokens & code

CSS
--color: #309db4;
/* rgb */ color: rgb(48, 157, 180);
/* oklch */ color: oklch(64.6% 0.101 215.1);
Tailwind
colors: {
  custom: {
    50: '#7cbaca',
    500: '#309db4',
    950: '#000000',
  },
}
SCSS
$custom: #309db4;
$custom-light: #7cbaca;
$custom-dark: #000000;
JSON
{
  "hex": "#309db4",
  "rgb": {
    "r": 48,
    "g": 157,
    "b": 180
  },
  "hsl": {
    "h": 190.455,
    "s": 57.895,
    "l": 44.706
  },
  "oklch": {
    "l": 0.64554,
    "c": 0.10055,
    "h": 215.1
  },
  "luminance": 0.28038
}

Semantic roles & 50–950 ramp

primary
#309DB4
secondary
#C68779
accent
#6247E1
background
#F8FBFC
surface
#EFF6F8
border
#CAD0D1
text
#0B1113
muted
#7C8082

Preview Lab

Preview with #309DB4

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

Preview Lab → · Contrast checker → · Palette generator →

#309DB4 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva