#309BB5#309BB5

#309BB5 is a light, moderate cyan. Relative luminance 0.274; OKLCH L 64.1% C 0.101 H 217.8°. Best body text is #000000 at 6.48:1 contrast (WCAG AA passes).

Color values

HEX	#309BB5
RGB	rgb(48, 155, 181)
HSL	hsl(192, 58%, 45%)
HSV	hsv(192, 73%, 71%)
CMYK	cmyk(73.5%, 14.4%, 0%, 29%)
CIE-LAB	lab(59.35, -21.18, -22.17)
CIE-LCH	lch(59.35, 30.66, 226.32°)
OKLab	oklab(64.11% -0.0799 -0.0619)
OKLCH	oklch(64.11% 0.101 217.8)
XYZ	xyz(21.2773, 27.4048, 47.8754)
Luminance	0.2741 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#309BB5 #B54A30

analogous

#30B58C #309BB5 #3059B5

triadic

#309BB5 #B5309B #9BB530

tetradic

#309BB5 #8C30B5 #B54A30 #59B530

square

#309BB5 #8C30B5 #B54A30 #59B530

split-complementary

#309BB5 #B53059 #B58C30

monochromatic

#164854 #237285 #309BB5 #51B8D1 #82CCDE

Accessibility & contrast

On white

3.24

#309BB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.48

#309BB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #309BB5

6.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##309BB5	#FFFFFF	#000000	##000000
##309BB5	1.00	3.24	6.48	6.48
#FFFFFF	3.24	1.00	21.00	21.00
#000000	6.48	21.00	1.00	1.00
##000000	6.48	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8A96B6

Deuteranopia (green-blind)

#7889B5

Tritanopia (blue-blind)

#00A4A3

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #309bb5;
/* rgb */ color: rgb(48, 155, 181);
/* oklch */ color: oklch(64.1% 0.101 217.8);

Tailwind

colors: {
  custom: {
    50: '#7cb8cb',
    500: '#309bb5',
    950: '#000000',
  },
}

SCSS

$custom: #309bb5;
$custom-light: #7cb8cb;
$custom-dark: #000000;

JSON

{
  "hex": "#309bb5",
  "rgb": {
    "r": 48,
    "g": 155,
    "b": 181
  },
  "hsl": {
    "h": 191.729,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.64106,
    "c": 0.10104,
    "h": 217.8
  },
  "luminance": 0.27407
}

Semantic roles & 50–950 ramp

primary

#309BB5

secondary

#C7897A

accent

#6546E1

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #309BB5

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

Preview Lab → · Contrast checker → · Palette generator →