#309DB4#309DB4

#309DB4 is a light, moderate cyan. Relative luminance 0.280; OKLCH L 64.6% C 0.101 H 215.1°. Best body text is #000000 at 6.61:1 contrast (WCAG AA passes).

Color values

HEX	#309DB4
RGB	rgb(48, 157, 180)
HSL	hsl(190, 58%, 45%)
HSV	hsv(190, 73%, 71%)
CMYK	cmyk(73.3%, 12.8%, 0%, 29.4%)
CIE-LAB	lab(59.92, -22.54, -20.73)
CIE-LCH	lch(59.92, 30.63, 222.61°)
OKLab	oklab(64.55% -0.0823 -0.0578)
OKLCH	oklch(64.55% 0.101 215.1)
XYZ	xyz(21.5106, 28.0351, 47.4488)
Luminance	0.2804 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#309DB4 #B44730

analogous

#30B489 #309DB4 #305BB4

triadic

#309DB4 #B4309D #9DB430

tetradic

#309DB4 #8930B4 #B44730 #5BB430

square

#309DB4 #8930B4 #B44730 #5BB430

split-complementary

#309DB4 #B4305B #B48930

monochromatic

#164953 #237384 #309DB4 #51BAD1 #81CDDD

Accessibility & contrast

On white

3.18

#309DB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.61

#309DB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #309DB4

6.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##309DB4	#FFFFFF	#000000	##000000
##309DB4	1.00	3.18	6.61	6.61
#FFFFFF	3.18	1.00	21.00	21.00
#000000	6.61	21.00	1.00	1.00
##000000	6.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8D98B5

Deuteranopia (green-blind)

#7B8BB4

Tritanopia (blue-blind)

#00A6A4

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #309db4;
/* rgb */ color: rgb(48, 157, 180);
/* oklch */ color: oklch(64.6% 0.101 215.1);

Tailwind

colors: {
  custom: {
    50: '#7cbaca',
    500: '#309db4',
    950: '#000000',
  },
}

SCSS

$custom: #309db4;
$custom-light: #7cbaca;
$custom-dark: #000000;

JSON

{
  "hex": "#309db4",
  "rgb": {
    "r": 48,
    "g": 157,
    "b": 180
  },
  "hsl": {
    "h": 190.455,
    "s": 57.895,
    "l": 44.706
  },
  "oklch": {
    "l": 0.64554,
    "c": 0.10055,
    "h": 215.1
  },
  "luminance": 0.28038
}

Semantic roles & 50–950 ramp

primary

#309DB4

secondary

#C68779

accent

#6247E1

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #309DB4

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

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