#309BB7#309BB7

#309BB7 is a light, moderate cyan. Relative luminance 0.275; OKLCH L 64.2% C 0.102 H 219.3°. Best body text is #000000 at 6.50:1 contrast (WCAG AA passes).

Color values

HEX	#309BB7
RGB	rgb(48, 155, 183)
HSL	hsl(192, 58%, 45%)
HSV	hsv(192, 74%, 72%)
CMYK	cmyk(73.8%, 15.3%, 0%, 28.2%)
CIE-LAB	lab(59.42, -20.52, -23.19)
CIE-LCH	lch(59.42, 30.97, 228.49°)
OKLab	oklab(64.19% -0.0791 -0.0648)
OKLCH	oklch(64.19% 0.102 219.3)
XYZ	xyz(21.4839, 27.4874, 48.9639)
Luminance	0.2749 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#309BB7 #B74C30

analogous

#30B78F #309BB7 #3058B7

triadic

#309BB7 #B7309B #9BB730

tetradic

#309BB7 #8F30B7 #B74C30 #58B730

square

#309BB7 #8F30B7 #B74C30 #58B730

split-complementary

#309BB7 #B73058 #B78F30

monochromatic

#174956 #237287 #309BB7 #52B7D2 #83CBDE

Accessibility & contrast

On white

3.23

#309BB7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.50

#309BB7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #309BB7

6.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##309BB7	#FFFFFF	#000000	##000000
##309BB7	1.00	3.23	6.50	6.50
#FFFFFF	3.23	1.00	21.00	21.00
#000000	6.50	21.00	1.00	1.00
##000000	6.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8A97B9

Deuteranopia (green-blind)

#7789B7

Tritanopia (blue-blind)

#00A4A4

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #309bb7;
/* rgb */ color: rgb(48, 155, 183);
/* oklch */ color: oklch(64.2% 0.102 219.3);

Tailwind

colors: {
  custom: {
    50: '#7cb8cc',
    500: '#309bb7',
    950: '#000000',
  },
}

SCSS

$custom: #309bb7;
$custom-light: #7cb8cc;
$custom-dark: #000000;

JSON

{
  "hex": "#309bb7",
  "rgb": {
    "r": 48,
    "g": 155,
    "b": 183
  },
  "hsl": {
    "h": 192.444,
    "s": 58.442,
    "l": 45.294
  },
  "oklch": {
    "l": 0.64191,
    "c": 0.10223,
    "h": 219.3
  },
  "luminance": 0.2749
}

Semantic roles & 50–950 ramp

primary

#309BB7

secondary

#C88B7B

accent

#6646E2

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #309BB7

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

Preview Lab → · Contrast checker → · Palette generator →