#2399B9#2399B9

#2399B9 is a light, moderate cyan. Relative luminance 0.266; OKLCH L 63.5% C 0.108 H 221.3°. Best body text is #000000 at 6.33:1 contrast (WCAG AA passes).

Color values

HEX	#2399B9
RGB	rgb(35, 153, 185)
HSL	hsl(193, 68%, 43%)
HSV	hsv(193, 81%, 73%)
CMYK	cmyk(81.1%, 17.3%, 0%, 27.5%)
CIE-LAB	lab(58.64, -20.23, -25.54)
CIE-LCH	lch(58.64, 32.58, 231.62°)
OKLab	oklab(63.52% -0.0814 -0.0716)
OKLCH	oklch(63.52% 0.108 221.3)
XYZ	xyz(20.8376, 26.6400, 49.9333)
Luminance	0.2664 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2399B9 #B94323

analogous

#23B98E #2399B9 #234EB9

triadic

#2399B9 #B92399 #99B923

tetradic

#2399B9 #8E23B9 #B94323 #4EB923

square

#2399B9 #8E23B9 #B94323 #4EB923

split-complementary

#2399B9 #B9234E #B98E23

monochromatic

#104452 #196E86 #2399B9 #3FB9DB #72CCE4

Accessibility & contrast

On white

3.32

#2399B9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.33

#2399B9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #2399B9

6.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2399B9	#FFFFFF	#000000	##000000
##2399B9	1.00	3.32	6.33	6.33
#FFFFFF	3.32	1.00	21.00	21.00
#000000	6.33	21.00	1.00	1.00
##000000	6.33	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8695BB

Deuteranopia (green-blind)

#7287B9

Tritanopia (blue-blind)

#00A3A3

Achromatopsia (no color)

#8D8D8D

Design tokens & code

CSS

--color: #2399b9;
/* rgb */ color: rgb(35, 153, 185);
/* oklch */ color: oklch(63.5% 0.108 221.3);

Tailwind

colors: {
  custom: {
    50: '#78b7ce',
    500: '#2399b9',
    950: '#000000',
  },
}

SCSS

$custom: #2399b9;
$custom-light: #78b7ce;
$custom-dark: #000000;

JSON

{
  "hex": "#2399b9",
  "rgb": {
    "r": 35,
    "g": 153,
    "b": 185
  },
  "hsl": {
    "h": 192.8,
    "s": 68.182,
    "l": 43.137
  },
  "oklch": {
    "l": 0.63516,
    "c": 0.10838,
    "h": 221.3
  },
  "luminance": 0.26643
}

Semantic roles & 50–950 ramp

primary

#2399B9

secondary

#CB816D

accent

#623DEB

background

#F8FBFC

surface

#EFF6F9

border

#CAD0D2

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #2399B9

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

Preview Lab → · Contrast checker → · Palette generator →