#309AB3#309AB3

#309AB3 is a light, moderate cyan. Relative luminance 0.270; OKLCH L 63.8% C 0.100 H 217.1°. Best body text is #000000 at 6.40:1 contrast (WCAG AA passes).

Color values

HEX	#309AB3
RGB	rgb(48, 154, 179)
HSL	hsl(191, 58%, 45%)
HSV	hsv(191, 73%, 70%)
CMYK	cmyk(73.2%, 14%, 0%, 29.8%)
CIE-LAB	lab(58.97, -21.30, -21.63)
CIE-LCH	lch(58.97, 30.36, 225.43°)
OKLab	oklab(63.78% -0.0797 -0.0603)
OKLCH	oklch(63.78% 0.1 217.1)
XYZ	xyz(20.9078, 26.9918, 46.7471)
Luminance	0.2699 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#309AB3 #B34930

analogous

#30B38A #309AB3 #3059B3

triadic

#309AB3 #B3309A #9AB330

tetradic

#309AB3 #8A30B3 #B34930 #59B330

square

#309AB3 #8A30B3 #B34930 #59B330

split-complementary

#309AB3 #B33059 #B38A30

monochromatic

#164752 #237083 #309AB3 #50B8D0 #80CBDD

Accessibility & contrast

On white

3.28

#309AB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.40

#309AB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #309AB3

6.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##309AB3	#FFFFFF	#000000	##000000
##309AB3	1.00	3.28	6.40	6.40
#FFFFFF	3.28	1.00	21.00	21.00
#000000	6.40	21.00	1.00	1.00
##000000	6.40	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8A95B4

Deuteranopia (green-blind)

#7888B3

Tritanopia (blue-blind)

#00A3A2

Achromatopsia (no color)

#8E8E8E

Design tokens & code

CSS

--color: #309ab3;
/* rgb */ color: rgb(48, 154, 179);
/* oklch */ color: oklch(63.8% 0.100 217.1);

Tailwind

colors: {
  custom: {
    50: '#7bb8c9',
    500: '#309ab3',
    950: '#000000',
  },
}

SCSS

$custom: #309ab3;
$custom-light: #7bb8c9;
$custom-dark: #000000;

JSON

{
  "hex": "#309ab3",
  "rgb": {
    "r": 48,
    "g": 154,
    "b": 179
  },
  "hsl": {
    "h": 191.45,
    "s": 57.709,
    "l": 44.51
  },
  "oklch": {
    "l": 0.63775,
    "c": 0.09994,
    "h": 217.1
  },
  "luminance": 0.26994
}

Semantic roles & 50–950 ramp

primary

#309AB3

secondary

#C68879

accent

#6447E1

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #309AB3

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

Preview Lab → · Contrast checker → · Palette generator →