#309BB9#309BB9

#309BB9 is a light, moderate cyan. Relative luminance 0.276; OKLCH L 64.3% C 0.103 H 220.8°. Best body text is #000000 at 6.51:1 contrast (WCAG AA passes).

Color values

HEX	#309BB9
RGB	rgb(48, 155, 185)
HSL	hsl(193, 59%, 46%)
HSV	hsv(193, 74%, 73%)
CMYK	cmyk(74.1%, 16.2%, 0%, 27.5%)
CIE-LAB	lab(59.50, -19.87, -24.20)
CIE-LCH	lch(59.50, 31.31, 230.62°)
OKLab	oklab(64.28% -0.0783 -0.0677)
OKLCH	oklch(64.28% 0.103 220.8)
XYZ	xyz(21.6936, 27.5713, 50.0680)
Luminance	0.2757 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#309BB9 #B94E30

analogous

#30B992 #309BB9 #3056B9

triadic

#309BB9 #B9309B #9BB930

tetradic

#309BB9 #9230B9 #B94E30 #56B930

square

#309BB9 #9230B9 #B94E30 #56B930

split-complementary

#309BB9 #B93056 #B99230

monochromatic

#174A58 #237288 #309BB9 #54B7D3 #84CBDF

Accessibility & contrast

On white

3.22

#309BB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.51

#309BB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #309BB9

6.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##309BB9	#FFFFFF	#000000	##000000
##309BB9	1.00	3.22	6.51	6.51
#FFFFFF	3.22	1.00	21.00	21.00
#000000	6.51	21.00	1.00	1.00
##000000	6.51	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8997BB

Deuteranopia (green-blind)

#7689B9

Tritanopia (blue-blind)

#00A5A5

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #309bb9;
/* rgb */ color: rgb(48, 155, 185);
/* oklch */ color: oklch(64.3% 0.103 220.8);

Tailwind

colors: {
  custom: {
    50: '#7cb8ce',
    500: '#309bb9',
    950: '#000000',
  },
}

SCSS

$custom: #309bb9;
$custom-light: #7cb8ce;
$custom-dark: #000000;

JSON

{
  "hex": "#309bb9",
  "rgb": {
    "r": 48,
    "g": 155,
    "b": 185
  },
  "hsl": {
    "h": 193.139,
    "s": 58.798,
    "l": 45.686
  },
  "oklch": {
    "l": 0.64278,
    "c": 0.10348,
    "h": 220.8
  },
  "luminance": 0.27574
}

Semantic roles & 50–950 ramp

primary

#309BB9

secondary

#C98D7C

accent

#6846E2

background

#F8FBFC

surface

#EFF6F9

border

#CAD0D2

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #309BB9

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

Preview Lab → · Contrast checker → · Palette generator →