#2599B3#2599B3

#2599B3 is a light, moderate cyan. Relative luminance 0.264; OKLCH L 63.3% C 0.104 H 217.1°. Best body text is #000000 at 6.29:1 contrast (WCAG AA passes).

Color values

HEX	#2599B3
RGB	rgb(37, 153, 179)
HSL	hsl(191, 66%, 42%)
HSV	hsv(191, 79%, 70%)
CMYK	cmyk(79.3%, 14.5%, 0%, 29.8%)
CIE-LAB	lab(58.44, -22.05, -22.45)
CIE-LCH	lch(58.44, 31.47, 225.51°)
OKLab	oklab(63.29% -0.0831 -0.0627)
OKLCH	oklch(63.29% 0.104 217.1)
XYZ	xyz(20.2874, 26.4279, 46.6709)
Luminance	0.2643 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2599B3 #B33F25

analogous

#25B386 #2599B3 #2552B3

triadic

#2599B3 #B32599 #99B325

tetradic

#2599B3 #8625B3 #B33F25 #52B325

square

#2599B3 #8625B3 #B33F25 #52B325

split-complementary

#2599B3 #B32552 #B38625

monochromatic

#10424E #1B6E80 #2599B3 #3EBBD7 #71CDE2

Accessibility & contrast

On white

3.34

#2599B3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.29

#2599B3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #2599B3

6.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2599B3	#FFFFFF	#000000	##000000
##2599B3	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)

#8894B4

Deuteranopia (green-blind)

#7587B3

Tritanopia (blue-blind)

#00A2A1

Achromatopsia (no color)

#8D8D8D

Design tokens & code

CSS

--color: #2599b3;
/* rgb */ color: rgb(37, 153, 179);
/* oklch */ color: oklch(63.3% 0.104 217.1);

Tailwind

colors: {
  custom: {
    50: '#78b7c9',
    500: '#2599b3',
    950: '#000000',
  },
}

SCSS

$custom: #2599b3;
$custom-light: #78b7c9;
$custom-dark: #000000;

JSON

{
  "hex": "#2599b3",
  "rgb": {
    "r": 37,
    "g": 153,
    "b": 179
  },
  "hsl": {
    "h": 190.986,
    "s": 65.741,
    "l": 42.353
  },
  "oklch": {
    "l": 0.63289,
    "c": 0.10411,
    "h": 217.1
  },
  "luminance": 0.2643
}

Semantic roles & 50–950 ramp

primary

#2599B3

secondary

#C87C6B

accent

#5E3FE9

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0A1113

muted

#7C8082

Preview Lab

Preview with #2599B3

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

Preview Lab → · Contrast checker → · Palette generator →