#2566B6#2566B6

#2566B6 is a mid, vivid cyan. Relative luminance 0.133; OKLCH L 51.2% C 0.142 H 255.7°. Best body text is #FFFFFF at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#2566B6
RGB	rgb(37, 102, 182)
HSL	hsl(213, 66%, 43%)
HSV	hsv(213, 80%, 71%)
CMYK	cmyk(79.7%, 44%, 0%, 28.6%)
CIE-LAB	lab(43.17, 8.73, -48.13)
CIE-LCH	lch(43.17, 48.92, 280.28°)
OKLab	oklab(51.24% -0.0351 -0.1379)
OKLCH	oklch(51.24% 0.142 255.7)
XYZ	xyz(13.9547, 13.2718, 46.0731)
Luminance	0.1327 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2566B6 #B67525

analogous

#25AFB6 #2566B6 #2C25B6

triadic

#2566B6 #B62566 #66B625

tetradic

#2566B6 #B625AF #B67525 #25B62C

square

#2566B6 #B625AF #B67525 #25B62C

split-complementary

#2566B6 #B62C25 #AFB625

monochromatic

#102D50 #1B4983 #2566B6 #4084D8 #73A5E3

Accessibility & contrast

On white

5.75

#2566B6 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.65

#2566B6 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2566B6

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2566B6	#FFFFFF	#000000	##FFFFFF
##2566B6	1.00	5.75	3.65	5.75
#FFFFFF	5.75	1.00	21.00	1.00
#000000	3.65	21.00	1.00	21.00
##FFFFFF	5.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D6DB9

Deuteranopia (green-blind)

#2060B4

Tritanopia (blue-blind)

#007985

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #2566b6;
/* rgb */ color: rgb(37, 102, 182);
/* oklch */ color: oklch(51.2% 0.142 255.7);

Tailwind

colors: {
  custom: {
    50: '#7691cc',
    500: '#2566b6',
    950: '#000000',
  },
}

SCSS

$custom: #2566b6;
$custom-light: #7691cc;
$custom-dark: #000000;

JSON

{
  "hex": "#2566b6",
  "rgb": {
    "r": 37,
    "g": 102,
    "b": 182
  },
  "hsl": {
    "h": 213.103,
    "s": 66.21,
    "l": 42.941
  },
  "oklch": {
    "l": 0.51236,
    "c": 0.14234,
    "h": 255.7
  },
  "luminance": 0.13273
}

Semantic roles & 50–950 ramp

primary

#2566B6

secondary

#CAA06D

accent

#9D3FE9

background

#F7F8FC

surface

#EEF0F9

border

#C9CBD2

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #2566B6

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

Preview Lab → · Contrast checker → · Palette generator →