#309DB5#309DB5

#309DB5 is a light, moderate cyan. Relative luminance 0.281; OKLCH L 64.6% C 0.101 H 215.9°. Best body text is #000000 at 6.62:1 contrast (WCAG AA passes).

Color values

HEX	#309DB5
RGB	rgb(48, 157, 181)
HSL	hsl(191, 58%, 45%)
HSV	hsv(191, 73%, 71%)
CMYK	cmyk(73.5%, 13.3%, 0%, 29%)
CIE-LAB	lab(59.96, -22.22, -21.24)
CIE-LCH	lch(59.96, 30.74, 223.71°)
OKLab	oklab(64.6% -0.0819 -0.0592)
OKLCH	oklch(64.6% 0.101 215.9)
XYZ	xyz(21.6129, 28.0760, 47.9872)
Luminance	0.2808 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#309DB5 #B54830

analogous

#30B58B #309DB5 #305BB5

triadic

#309DB5 #B5309D #9DB530

tetradic

#309DB5 #8B30B5 #B54830 #5BB530

square

#309DB5 #8B30B5 #B54830 #5BB530

split-complementary

#309DB5 #B5305B #B58B30

monochromatic

#164954 #237385 #309DB5 #51BAD1 #82CDDE

Accessibility & contrast

On white

3.17

#309DB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.62

#309DB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #309DB5

6.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##309DB5	#FFFFFF	#000000	##000000
##309DB5	1.00	3.17	6.62	6.62
#FFFFFF	3.17	1.00	21.00	21.00
#000000	6.62	21.00	1.00	1.00
##000000	6.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8D98B6

Deuteranopia (green-blind)

#7A8BB5

Tritanopia (blue-blind)

#00A6A4

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #309db5;
/* rgb */ color: rgb(48, 157, 181);
/* oklch */ color: oklch(64.6% 0.101 215.9);

Tailwind

colors: {
  custom: {
    50: '#7cbacb',
    500: '#309db5',
    950: '#000000',
  },
}

SCSS

$custom: #309db5;
$custom-light: #7cbacb;
$custom-dark: #000000;

JSON

{
  "hex": "#309db5",
  "rgb": {
    "r": 48,
    "g": 157,
    "b": 181
  },
  "hsl": {
    "h": 190.827,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.64596,
    "c": 0.10106,
    "h": 215.9
  },
  "luminance": 0.28079
}

Semantic roles & 50–950 ramp

primary

#309DB5

secondary

#C7887A

accent

#6246E1

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #309DB5

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

Preview Lab → · Contrast checker → · Palette generator →