#2399B4#2399B4

#2399B4 is a light, moderate cyan. Relative luminance 0.264; OKLCH L 63.3% C 0.105 H 217.7°. Best body text is #000000 at 6.29:1 contrast (WCAG AA passes).

Color values

HEX	#2399B4
RGB	rgb(35, 153, 180)
HSL	hsl(191, 67%, 42%)
HSV	hsv(191, 81%, 71%)
CMYK	cmyk(80.6%, 15%, 0%, 29.4%)
CIE-LAB	lab(58.45, -21.92, -23.01)
CIE-LCH	lch(58.45, 31.78, 226.40°)
OKLab	oklab(63.3% -0.0834 -0.0643)
OKLCH	oklch(63.3% 0.105 217.7)
XYZ	xyz(20.3191, 26.4325, 47.2022)
Luminance	0.2643 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2399B4 #B43E23

analogous

#23B486 #2399B4 #2351B4

triadic

#2399B4 #B42399 #99B423

tetradic

#2399B4 #8623B4 #B43E23 #51B423

square

#2399B4 #8623B4 #B43E23 #51B423

split-complementary

#2399B4 #B42351 #B48623

monochromatic

#0F424E #196D81 #2399B4 #3BBCD9 #6ECDE3

Accessibility & contrast

On white

3.34

#2399B4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.29

#2399B4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #2399B4

6.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2399B4	#FFFFFF	#000000	##000000
##2399B4	1.00	3.34	6.29	6.29
#FFFFFF	3.34	1.00	21.00	21.00
#000000	6.29	21.00	1.00	1.00
##000000	6.29	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8894B5

Deuteranopia (green-blind)

#7587B4

Tritanopia (blue-blind)

#00A2A2

Achromatopsia (no color)

#8D8D8D

Design tokens & code

CSS

--color: #2399b4;
/* rgb */ color: rgb(35, 153, 180);
/* oklch */ color: oklch(63.3% 0.105 217.7);

Tailwind

colors: {
  custom: {
    50: '#77b7ca',
    500: '#2399b4',
    950: '#000000',
  },
}

SCSS

$custom: #2399b4;
$custom-light: #77b7ca;
$custom-dark: #000000;

JSON

{
  "hex": "#2399b4",
  "rgb": {
    "r": 35,
    "g": 153,
    "b": 180
  },
  "hsl": {
    "h": 191.172,
    "s": 67.442,
    "l": 42.157
  },
  "oklch": {
    "l": 0.63295,
    "c": 0.10531,
    "h": 217.7
  },
  "luminance": 0.26435
}

Semantic roles & 50–950 ramp

primary

#2399B4

secondary

#C97B69

accent

#5E3DEA

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0A1113

muted

#7C8082

Preview Lab

Preview with #2399B4

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

Preview Lab → · Contrast checker → · Palette generator →