#2599B9#2599B9

#2599B9 is a light, moderate cyan. Relative luminance 0.267; OKLCH L 63.6% C 0.108 H 221.5°. Best body text is #000000 at 6.34:1 contrast (WCAG AA passes).

Color values

HEX	#2599B9
RGB	rgb(37, 153, 185)
HSL	hsl(193, 67%, 44%)
HSV	hsv(193, 80%, 73%)
CMYK	cmyk(80%, 17.3%, 0%, 27.5%)
CIE-LAB	lab(58.67, -20.04, -25.49)
CIE-LCH	lch(58.67, 32.42, 231.82°)
OKLab	oklab(63.55% -0.0807 -0.0714)
OKLCH	oklch(63.55% 0.108 221.5)
XYZ	xyz(20.9074, 26.6760, 49.9366)
Luminance	0.2668 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2599B9 #B94525

analogous

#25B98F #2599B9 #254FB9

triadic

#2599B9 #B92599 #99B925

tetradic

#2599B9 #8F25B9 #B94525 #4FB925

square

#2599B9 #8F25B9 #B94525 #4FB925

split-complementary

#2599B9 #B9254F #B98F25

monochromatic

#114553 #1B6F86 #2599B9 #42B9D9 #75CCE3

Accessibility & contrast

On white

3.31

#2599B9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.34

#2599B9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #2599B9

6.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2599B9	#FFFFFF	#000000	##000000
##2599B9	1.00	3.31	6.34	6.34
#FFFFFF	3.31	1.00	21.00	21.00
#000000	6.34	21.00	1.00	1.00
##000000	6.34	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8695BB

Deuteranopia (green-blind)

#7387B9

Tritanopia (blue-blind)

#00A3A3

Achromatopsia (no color)

#8D8D8D

Design tokens & code

CSS

--color: #2599b9;
/* rgb */ color: rgb(37, 153, 185);
/* oklch */ color: oklch(63.6% 0.108 221.5);

Tailwind

colors: {
  custom: {
    50: '#79b7ce',
    500: '#2599b9',
    950: '#000000',
  },
}

SCSS

$custom: #2599b9;
$custom-light: #79b7ce;
$custom-dark: #000000;

JSON

{
  "hex": "#2599b9",
  "rgb": {
    "r": 37,
    "g": 153,
    "b": 185
  },
  "hsl": {
    "h": 192.973,
    "s": 66.667,
    "l": 43.529
  },
  "oklch": {
    "l": 0.63552,
    "c": 0.10775,
    "h": 221.5
  },
  "luminance": 0.26679
}

Semantic roles & 50–950 ramp

primary

#2599B9

secondary

#CB836F

accent

#633EEA

background

#F8FBFC

surface

#EFF6F9

border

#CAD0D2

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #2599B9

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

Preview Lab → · Contrast checker → · Palette generator →