#309CB5#309CB5

#309CB5 is a light, moderate cyan. Relative luminance 0.277; OKLCH L 64.4% C 0.101 H 216.8°. Best body text is #000000 at 6.55:1 contrast (WCAG AA passes).

Color values

HEX	#309CB5
RGB	rgb(48, 156, 181)
HSL	hsl(191, 58%, 45%)
HSV	hsv(191, 73%, 71%)
CMYK	cmyk(73.5%, 13.8%, 0%, 29%)
CIE-LAB	lab(59.65, -21.70, -21.71)
CIE-LCH	lch(59.65, 30.69, 225.01°)
OKLab	oklab(64.35% -0.0809 -0.0606)
OKLCH	oklch(64.35% 0.101 216.8)
XYZ	xyz(21.4444, 27.7390, 47.9311)
Luminance	0.2774 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#309CB5 #B54930

analogous

#30B58B #309CB5 #305AB5

triadic

#309CB5 #B5309C #9CB530

tetradic

#309CB5 #8B30B5 #B54930 #5AB530

square

#309CB5 #8B30B5 #B54930 #5AB530

split-complementary

#309CB5 #B5305A #B58B30

monochromatic

#164954 #237285 #309CB5 #51B9D1 #82CCDE

Accessibility & contrast

On white

3.21

#309CB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.55

#309CB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #309CB5

6.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##309CB5	#FFFFFF	#000000	##000000
##309CB5	1.00	3.21	6.55	6.55
#FFFFFF	3.21	1.00	21.00	21.00
#000000	6.55	21.00	1.00	1.00
##000000	6.55	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8B97B6

Deuteranopia (green-blind)

#798AB5

Tritanopia (blue-blind)

#00A5A4

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #309cb5;
/* rgb */ color: rgb(48, 156, 181);
/* oklch */ color: oklch(64.4% 0.101 216.8);

Tailwind

colors: {
  custom: {
    50: '#7cb9cb',
    500: '#309cb5',
    950: '#000000',
  },
}

SCSS

$custom: #309cb5;
$custom-light: #7cb9cb;
$custom-dark: #000000;

JSON

{
  "hex": "#309cb5",
  "rgb": {
    "r": 48,
    "g": 156,
    "b": 181
  },
  "hsl": {
    "h": 191.278,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.64351,
    "c": 0.10104,
    "h": 216.8
  },
  "luminance": 0.27742
}

Semantic roles & 50–950 ramp

primary

#309CB5

secondary

#C7887A

accent

#6446E1

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #309CB5

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

Preview Lab → · Contrast checker → · Palette generator →