#309AB4#309AB4

#309AB4 is a light, moderate cyan. Relative luminance 0.270; OKLCH L 63.8% C 0.101 H 217.9°. Best body text is #000000 at 6.41:1 contrast (WCAG AA passes).

Color values

HEX	#309AB4
RGB	rgb(48, 154, 180)
HSL	hsl(192, 58%, 45%)
HSV	hsv(192, 73%, 71%)
CMYK	cmyk(73.3%, 14.4%, 0%, 29.4%)
CIE-LAB	lab(59.00, -20.98, -22.13)
CIE-LCH	lch(59.00, 30.50, 226.54°)
OKLab	oklab(63.82% -0.0793 -0.0618)
OKLCH	oklch(63.82% 0.101 217.9)
XYZ	xyz(21.0093, 27.0324, 47.2817)
Luminance	0.2703 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#309AB4 #B44A30

analogous

#30B48C #309AB4 #3058B4

triadic

#309AB4 #B4309A #9AB430

tetradic

#309AB4 #8C30B4 #B44A30 #58B430

square

#309AB4 #8C30B4 #B44A30 #58B430

split-complementary

#309AB4 #B43058 #B48C30

monochromatic

#164753 #237184 #309AB4 #51B7D1 #81CBDD

Accessibility & contrast

On white

3.28

#309AB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.41

#309AB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #309AB4

6.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##309AB4	#FFFFFF	#000000	##000000
##309AB4	1.00	3.28	6.41	6.41
#FFFFFF	3.28	1.00	21.00	21.00
#000000	6.41	21.00	1.00	1.00
##000000	6.41	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8995B5

Deuteranopia (green-blind)

#7788B4

Tritanopia (blue-blind)

#00A3A2

Achromatopsia (no color)

#8E8E8E

Design tokens & code

CSS

--color: #309ab4;
/* rgb */ color: rgb(48, 154, 180);
/* oklch */ color: oklch(63.8% 0.101 217.9);

Tailwind

colors: {
  custom: {
    50: '#7bb8ca',
    500: '#309ab4',
    950: '#000000',
  },
}

SCSS

$custom: #309ab4;
$custom-light: #7bb8ca;
$custom-dark: #000000;

JSON

{
  "hex": "#309ab4",
  "rgb": {
    "r": 48,
    "g": 154,
    "b": 180
  },
  "hsl": {
    "h": 191.818,
    "s": 57.895,
    "l": 44.706
  },
  "oklch": {
    "l": 0.63818,
    "c": 0.1005,
    "h": 217.9
  },
  "luminance": 0.27035
}

Semantic roles & 50–950 ramp

primary

#309AB4

secondary

#C68979

accent

#6547E1

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #309AB4

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

Preview Lab → · Contrast checker → · Palette generator →