#309DBB#309DBB

#309DBB is a light, moderate cyan. Relative luminance 0.283; OKLCH L 64.9% C 0.105 H 220.5°. Best body text is #000000 at 6.67:1 contrast (WCAG AA passes).

Color values

HEX#309DBB
RGBrgb(48, 157, 187)
HSLhsl(193, 59%, 46%)
HSVhsv(193, 74%, 73%)
CMYKcmyk(74.3%, 16%, 0%, 26.7%)
CIE-LABlab(60.18, -20.26, -24.27)
CIE-LCHlch(60.18, 31.62, 230.15°)
OKLaboklab(64.85% -0.0795 -0.0679)
OKLCHoklch(64.85% 0.105 220.5)
XYZxyz(22.2418, 28.3275, 51.2996)
Luminance0.2833 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#309DBB #BB4E30
analogous
#30BB93 #309DBB #3057BB
triadic
#309DBB #BB309D #9DBB30
tetradic
#309DBB #9330BB #BB4E30 #57BB30
square
#309DBB #9330BB #BB4E30 #57BB30
split-complementary
#309DBB #BB3057 #BB9330
monochromatic
#174B5A #23748A #309DBB #55B8D3 #86CCE0

Accessibility & contrast

On white

3.15
#309DBB on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.67
#309DBB on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #309DBB
6.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##309DBB#FFFFFF#000000##000000
##309DBB1.003.156.676.67
#FFFFFF3.151.0021.0021.00
#0000006.6721.001.001.00
##0000006.6721.001.001.00

Color blindness preview

Protanopia (red-blind)
#8B99BD
Deuteranopia (green-blind)
#788BBB
Tritanopia (blue-blind)
#00A7A7
Achromatopsia (no color)
#919191

Design tokens & code

CSS
--color: #309dbb;
/* rgb */ color: rgb(48, 157, 187);
/* oklch */ color: oklch(64.9% 0.105 220.5);
Tailwind
colors: {
  custom: {
    50: '#7dbacf',
    500: '#309dbb',
    950: '#000000',
  },
}
SCSS
$custom: #309dbb;
$custom-light: #7dbacf;
$custom-dark: #000000;
JSON
{
  "hex": "#309dbb",
  "rgb": {
    "r": 48,
    "g": 157,
    "b": 187
  },
  "hsl": {
    "h": 192.95,
    "s": 59.149,
    "l": 46.078
  },
  "oklch": {
    "l": 0.64853,
    "c": 0.10452,
    "h": 220.5
  },
  "luminance": 0.2833
}

Semantic roles & 50–950 ramp

primary
#309DBB
secondary
#C98E7D
accent
#6745E2
background
#F8FBFC
surface
#EFF6F9
border
#CAD0D2
text
#0B1113
muted
#7C8082

Preview Lab

Preview with #309DBB

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

Preview Lab → · Contrast checker → · Palette generator →

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