#2566BB#2566BB

#2566BB is a mid, vivid cyan. Relative luminance 0.135; OKLCH L 51.6% C 0.149 H 256.8°. Best body text is #FFFFFF at 5.68:1 contrast (WCAG AA passes).

Color values

HEX	#2566BB
RGB	rgb(37, 102, 187)
HSL	hsl(214, 67%, 44%)
HSV	hsv(214, 80%, 73%)
CMYK	cmyk(80.2%, 45.5%, 0%, 26.7%)
CIE-LAB	lab(43.48, 10.66, -50.55)
CIE-LCH	lch(43.48, 51.66, 281.91°)
OKLab	oklab(51.58% -0.0341 -0.145)
OKLCH	oklch(51.58% 0.149 256.8)
XYZ	xyz(14.4806, 13.4822, 48.8432)
Luminance	0.1348 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2566BB #BB7A25

analogous

#25B1BB #2566BB #2F25BB

triadic

#2566BB #BB2566 #66BB25

tetradic

#2566BB #BB25B1 #BB7A25 #25BB2F

square

#2566BB #BB25B1 #BB7A25 #25BB2F

split-complementary

#2566BB #BB2F25 #B1BB25

monochromatic

#112E55 #1B4A88 #2566BB #4385DA #76A6E4

Accessibility & contrast

On white

5.68

#2566BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.70

#2566BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2566BB

5.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2566BB	#FFFFFF	#000000	##FFFFFF
##2566BB	1.00	5.68	3.70	5.68
#FFFFFF	5.68	1.00	21.00	1.00
#000000	3.70	21.00	1.00	21.00
##FFFFFF	5.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#396EBE

Deuteranopia (green-blind)

#1660B9

Tritanopia (blue-blind)

#007A87

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #2566bb;
/* rgb */ color: rgb(37, 102, 187);
/* oklch */ color: oklch(51.6% 0.149 256.8);

Tailwind

colors: {
  custom: {
    50: '#7791d0',
    500: '#2566bb',
    950: '#000000',
  },
}

SCSS

$custom: #2566bb;
$custom-light: #7791d0;
$custom-dark: #000000;

JSON

{
  "hex": "#2566bb",
  "rgb": {
    "r": 37,
    "g": 102,
    "b": 187
  },
  "hsl": {
    "h": 214,
    "s": 66.964,
    "l": 43.922
  },
  "oklch": {
    "l": 0.51577,
    "c": 0.149,
    "h": 256.8
  },
  "luminance": 0.13484
}

Semantic roles & 50–950 ramp

primary

#2566BB

secondary

#CBA470

accent

#9F3EEA

background

#F7F8FC

surface

#EEF0F9

border

#C9CBD2

text

#0A0C14

muted

#7C7D82

Preview Lab

Preview with #2566BB

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

Preview Lab → · Contrast checker → · Palette generator →