#309CB4#309CB4

#309CB4 is a light, moderate cyan. Relative luminance 0.277; OKLCH L 64.3% C 0.101 H 216.0°. Best body text is #000000 at 6.54:1 contrast (WCAG AA passes).

Color values

HEX	#309CB4
RGB	rgb(48, 156, 180)
HSL	hsl(191, 58%, 45%)
HSV	hsv(191, 73%, 71%)
CMYK	cmyk(73.3%, 13.3%, 0%, 29.4%)
CIE-LAB	lab(59.62, -22.02, -21.20)
CIE-LCH	lch(59.62, 30.57, 223.91°)
OKLab	oklab(64.31% -0.0813 -0.0591)
OKLCH	oklch(64.31% 0.101 216)
XYZ	xyz(21.3421, 27.6981, 47.3926)
Luminance	0.2770 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#309CB4 #B44830

analogous

#30B48A #309CB4 #305AB4

triadic

#309CB4 #B4309C #9CB430

tetradic

#309CB4 #8A30B4 #B44830 #5AB430

square

#309CB4 #8A30B4 #B44830 #5AB430

split-complementary

#309CB4 #B4305A #B48A30

monochromatic

#164853 #237284 #309CB4 #51B9D1 #81CDDD

Accessibility & contrast

On white

3.21

#309CB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.54

#309CB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #309CB4

6.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##309CB4	#FFFFFF	#000000	##000000
##309CB4	1.00	3.21	6.54	6.54
#FFFFFF	3.21	1.00	21.00	21.00
#000000	6.54	21.00	1.00	1.00
##000000	6.54	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8C97B5

Deuteranopia (green-blind)

#7A8AB4

Tritanopia (blue-blind)

#00A5A3

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #309cb4;
/* rgb */ color: rgb(48, 156, 180);
/* oklch */ color: oklch(64.3% 0.101 216.0);

Tailwind

colors: {
  custom: {
    50: '#7cb9ca',
    500: '#309cb4',
    950: '#000000',
  },
}

SCSS

$custom: #309cb4;
$custom-light: #7cb9ca;
$custom-dark: #000000;

JSON

{
  "hex": "#309cb4",
  "rgb": {
    "r": 48,
    "g": 156,
    "b": 180
  },
  "hsl": {
    "h": 190.909,
    "s": 57.895,
    "l": 44.706
  },
  "oklch": {
    "l": 0.64309,
    "c": 0.10051,
    "h": 216
  },
  "luminance": 0.27701
}

Semantic roles & 50–950 ramp

primary

#309CB4

secondary

#C68779

accent

#6347E1

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #309CB4

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

Preview Lab → · Contrast checker → · Palette generator →