#309DB3#309DB3

#309DB3 is a light, moderate cyan. Relative luminance 0.280; OKLCH L 64.5% C 0.100 H 214.3°. Best body text is #000000 at 6.60:1 contrast (WCAG AA passes).

Color values

HEX	#309DB3
RGB	rgb(48, 157, 179)
HSL	hsl(190, 58%, 45%)
HSV	hsv(190, 73%, 70%)
CMYK	cmyk(73.2%, 12.3%, 0%, 29.8%)
CIE-LAB	lab(59.88, -22.86, -20.22)
CIE-LCH	lch(59.88, 30.52, 221.49°)
OKLab	oklab(64.51% -0.0827 -0.0564)
OKLCH	oklch(64.51% 0.1 214.3)
XYZ	xyz(21.4091, 27.9945, 46.9142)
Luminance	0.2800 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#309DB3 #B34630

analogous

#30B387 #309DB3 #305CB3

triadic

#309DB3 #B3309D #9DB330

tetradic

#309DB3 #8730B3 #B34630 #5CB330

square

#309DB3 #8730B3 #B34630 #5CB330

split-complementary

#309DB3 #B3305C #B38730

monochromatic

#164852 #237383 #309DB3 #50BBD0 #80CDDD

Accessibility & contrast

On white

3.18

#309DB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.60

#309DB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #309DB3

6.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##309DB3	#FFFFFF	#000000	##000000
##309DB3	1.00	3.18	6.60	6.60
#FFFFFF	3.18	1.00	21.00	21.00
#000000	6.60	21.00	1.00	1.00
##000000	6.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8D98B4

Deuteranopia (green-blind)

#7B8BB3

Tritanopia (blue-blind)

#00A5A4

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #309db3;
/* rgb */ color: rgb(48, 157, 179);
/* oklch */ color: oklch(64.5% 0.100 214.3);

Tailwind

colors: {
  custom: {
    50: '#7cbac9',
    500: '#309db3',
    950: '#000000',
  },
}

SCSS

$custom: #309db3;
$custom-light: #7cbac9;
$custom-dark: #000000;

JSON

{
  "hex": "#309db3",
  "rgb": {
    "r": 48,
    "g": 157,
    "b": 179
  },
  "hsl": {
    "h": 190.076,
    "s": 57.709,
    "l": 44.51
  },
  "oklch": {
    "l": 0.64513,
    "c": 0.10007,
    "h": 214.3
  },
  "luminance": 0.27997
}

Semantic roles & 50–950 ramp

primary

#309DB3

secondary

#C68679

accent

#6147E1

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #309DB3

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

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