#309BB8#309BB8

#309BB8 is a light, moderate cyan. Relative luminance 0.275; OKLCH L 64.2% C 0.103 H 220.1°. Best body text is #000000 at 6.51:1 contrast (WCAG AA passes).

Color values

HEX	#309BB8
RGB	rgb(48, 155, 184)
HSL	hsl(193, 59%, 45%)
HSV	hsv(193, 74%, 72%)
CMYK	cmyk(73.9%, 15.8%, 0%, 27.8%)
CIE-LAB	lab(59.46, -20.19, -23.69)
CIE-LCH	lch(59.46, 31.13, 229.56°)
OKLab	oklab(64.24% -0.0787 -0.0662)
OKLCH	oklch(64.24% 0.103 220.1)
XYZ	xyz(21.5884, 27.5292, 49.5140)
Luminance	0.2753 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#309BB8 #B84D30

analogous

#30B891 #309BB8 #3057B8

triadic

#309BB8 #B8309B #9BB830

tetradic

#309BB8 #9130B8 #B84D30 #57B830

square

#309BB8 #9130B8 #B84D30 #57B830

split-complementary

#309BB8 #B83057 #B89130

monochromatic

#174957 #237287 #309BB8 #53B7D2 #84CBDF

Accessibility & contrast

On white

3.23

#309BB8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.51

#309BB8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #309BB8

6.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##309BB8	#FFFFFF	#000000	##000000
##309BB8	1.00	3.23	6.51	6.51
#FFFFFF	3.23	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)

#8997BA

Deuteranopia (green-blind)

#7789B8

Tritanopia (blue-blind)

#00A4A4

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #309bb8;
/* rgb */ color: rgb(48, 155, 184);
/* oklch */ color: oklch(64.2% 0.103 220.1);

Tailwind

colors: {
  custom: {
    50: '#7cb8cd',
    500: '#309bb8',
    950: '#000000',
  },
}

SCSS

$custom: #309bb8;
$custom-light: #7cb8cd;
$custom-dark: #000000;

JSON

{
  "hex": "#309bb8",
  "rgb": {
    "r": 48,
    "g": 155,
    "b": 184
  },
  "hsl": {
    "h": 192.794,
    "s": 58.621,
    "l": 45.49
  },
  "oklch": {
    "l": 0.64235,
    "c": 0.10284,
    "h": 220.1
  },
  "luminance": 0.27532
}

Semantic roles & 50–950 ramp

primary

#309BB8

secondary

#C88C7C

accent

#6746E2

background

#F8FBFC

surface

#EFF6F9

border

#CAD0D2

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #309BB8

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

Preview Lab → · Contrast checker → · Palette generator →