#309CBB#309CBB

#309CBB is a light, moderate cyan. Relative luminance 0.280; OKLCH L 64.6% C 0.105 H 221.4°. Best body text is #000000 at 6.60:1 contrast (WCAG AA passes).

Color values

HEX	#309CBB
RGB	rgb(48, 156, 187)
HSL	hsl(193, 59%, 46%)
HSV	hsv(193, 74%, 73%)
CMYK	cmyk(74.3%, 16.6%, 0%, 26.7%)
CIE-LAB	lab(59.88, -19.73, -24.74)
CIE-LCH	lch(59.88, 31.65, 231.42°)
OKLab	oklab(64.61% -0.0785 -0.0692)
OKLCH	oklch(64.61% 0.105 221.4)
XYZ	xyz(22.0733, 27.9906, 51.2434)
Luminance	0.2799 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#309CBB #BB4F30

analogous

#30BB94 #309CBB #3056BB

triadic

#309CBB #BB309C #9CBB30

tetradic

#309CBB #9430BB #BB4F30 #56BB30

square

#309CBB #9430BB #BB4F30 #56BB30

split-complementary

#309CBB #BB3056 #BB9430

monochromatic

#174B5A #23738A #309CBB #55B7D3 #86CCE0

Accessibility & contrast

On white

3.18

#309CBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.60

#309CBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #309CBB

6.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##309CBB	#FFFFFF	#000000	##000000
##309CBB	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)

#8A98BD

Deuteranopia (green-blind)

#778ABB

Tritanopia (blue-blind)

#00A6A6

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #309cbb;
/* rgb */ color: rgb(48, 156, 187);
/* oklch */ color: oklch(64.6% 0.105 221.4);

Tailwind

colors: {
  custom: {
    50: '#7db9cf',
    500: '#309cbb',
    950: '#000000',
  },
}

SCSS

$custom: #309cbb;
$custom-light: #7db9cf;
$custom-dark: #000000;

JSON

{
  "hex": "#309cbb",
  "rgb": {
    "r": 48,
    "g": 156,
    "b": 187
  },
  "hsl": {
    "h": 193.381,
    "s": 59.149,
    "l": 46.078
  },
  "oklch": {
    "l": 0.6461,
    "c": 0.10465,
    "h": 221.4
  },
  "luminance": 0.27993
}

Semantic roles & 50–950 ramp

primary

#309CBB

secondary

#C98E7D

accent

#6845E2

background

#F8FBFC

surface

#EFF6F9

border

#CAD0D2

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #309CBB

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

Preview Lab → · Contrast checker → · Palette generator →