#309DB8#309DB8

#309DB8 is a light, moderate cyan. Relative luminance 0.282; OKLCH L 64.7% C 0.103 H 218.2°. Best body text is #000000 at 6.64:1 contrast (WCAG AA passes).

Color values

HEX	#309DB8
RGB	rgb(48, 157, 184)
HSL	hsl(192, 59%, 45%)
HSV	hsv(192, 74%, 72%)
CMYK	cmyk(73.9%, 14.7%, 0%, 27.8%)
CIE-LAB	lab(60.07, -21.24, -22.76)
CIE-LCH	lch(60.07, 31.13, 226.97°)
OKLab	oklab(64.72% -0.0807 -0.0635)
OKLCH	oklch(64.72% 0.103 218.2)
XYZ	xyz(21.9240, 28.2004, 49.6259)
Luminance	0.2820 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#309DB8 #B84B30

analogous

#30B88F #309DB8 #3059B8

triadic

#309DB8 #B8309D #9DB830

tetradic

#309DB8 #8F30B8 #B84B30 #59B830

square

#309DB8 #8F30B8 #B84B30 #59B830

split-complementary

#309DB8 #B83059 #B88F30

monochromatic

#174A57 #237487 #309DB8 #53B9D2 #84CDDF

Accessibility & contrast

On white

3.16

#309DB8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.64

#309DB8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #309DB8

6.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##309DB8	#FFFFFF	#000000	##000000
##309DB8	1.00	3.16	6.64	6.64
#FFFFFF	3.16	1.00	21.00	21.00
#000000	6.64	21.00	1.00	1.00
##000000	6.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8C98B9

Deuteranopia (green-blind)

#798BB8

Tritanopia (blue-blind)

#00A6A6

Achromatopsia (no color)

#919191

Design tokens & code

CSS

--color: #309db8;
/* rgb */ color: rgb(48, 157, 184);
/* oklch */ color: oklch(64.7% 0.103 218.2);

Tailwind

colors: {
  custom: {
    50: '#7cbacd',
    500: '#309db8',
    950: '#000000',
  },
}

SCSS

$custom: #309db8;
$custom-light: #7cbacd;
$custom-dark: #000000;

JSON

{
  "hex": "#309db8",
  "rgb": {
    "r": 48,
    "g": 157,
    "b": 184
  },
  "hsl": {
    "h": 191.912,
    "s": 58.621,
    "l": 45.49
  },
  "oklch": {
    "l": 0.64724,
    "c": 0.10269,
    "h": 218.2
  },
  "luminance": 0.28203
}

Semantic roles & 50–950 ramp

primary

#309DB8

secondary

#C88B7C

accent

#6546E2

background

#F8FBFC

surface

#EFF6F9

border

#CAD0D2

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #309DB8

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

Preview Lab → · Contrast checker → · Palette generator →