#309BB3#309BB3

#309BB3 is a light, moderate cyan. Relative luminance 0.273; OKLCH L 64.0% C 0.100 H 216.2°. Best body text is #000000 at 6.47:1 contrast (WCAG AA passes).

Color values

HEX	#309BB3
RGB	rgb(48, 155, 179)
HSL	hsl(191, 58%, 45%)
HSV	hsv(191, 73%, 70%)
CMYK	cmyk(73.2%, 13.4%, 0%, 29.8%)
CIE-LAB	lab(59.27, -21.83, -21.16)
CIE-LCH	lch(59.27, 30.40, 224.11°)
OKLab	oklab(64.02% -0.0807 -0.059)
OKLCH	oklch(64.02% 0.1 216.2)
XYZ	xyz(21.0735, 27.3233, 46.8024)
Luminance	0.2733 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#309BB3 #B34830

analogous

#30B389 #309BB3 #305AB3

triadic

#309BB3 #B3309B #9BB330

tetradic

#309BB3 #8930B3 #B34830 #5AB330

square

#309BB3 #8930B3 #B34830 #5AB330

split-complementary

#309BB3 #B3305A #B38930

monochromatic

#164752 #237183 #309BB3 #50B9D0 #80CCDD

Accessibility & contrast

On white

3.25

#309BB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.47

#309BB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #309BB3

6.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##309BB3	#FFFFFF	#000000	##000000
##309BB3	1.00	3.25	6.47	6.47
#FFFFFF	3.25	1.00	21.00	21.00
#000000	6.47	21.00	1.00	1.00
##000000	6.47	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8B96B4

Deuteranopia (green-blind)

#7989B3

Tritanopia (blue-blind)

#00A4A2

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #309bb3;
/* rgb */ color: rgb(48, 155, 179);
/* oklch */ color: oklch(64.0% 0.100 216.2);

Tailwind

colors: {
  custom: {
    50: '#7bb8c9',
    500: '#309bb3',
    950: '#000000',
  },
}

SCSS

$custom: #309bb3;
$custom-light: #7bb8c9;
$custom-dark: #000000;

JSON

{
  "hex": "#309bb3",
  "rgb": {
    "r": 48,
    "g": 155,
    "b": 179
  },
  "hsl": {
    "h": 190.992,
    "s": 57.709,
    "l": 44.51
  },
  "oklch": {
    "l": 0.64021,
    "c": 0.09996,
    "h": 216.2
  },
  "luminance": 0.27326
}

Semantic roles & 50–950 ramp

primary

#309BB3

secondary

#C68779

accent

#6347E1

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #309BB3

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

Preview Lab → · Contrast checker → · Palette generator →