#2566B0#2566B0

#2566B0 is a mid, vivid cyan. Relative luminance 0.130; OKLCH L 50.8% C 0.134 H 254.3°. Best body text is #FFFFFF at 5.82:1 contrast (WCAG AA passes).

Color values

HEX	#2566B0
RGB	rgb(37, 102, 176)
HSL	hsl(212, 65%, 42%)
HSV	hsv(212, 79%, 69%)
CMYK	cmyk(79%, 42%, 0%, 31%)
CIE-LAB	lab(42.81, 6.41, -45.20)
CIE-LCH	lch(42.81, 45.66, 278.08°)
OKLab	oklab(50.84% -0.0364 -0.1293)
OKLCH	oklch(50.84% 0.134 254.3)
XYZ	xyz(13.3479, 13.0291, 42.8773)
Luminance	0.1303 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2566B0 #B06F25

analogous

#25ACB0 #2566B0 #2925B0

triadic

#2566B0 #B02566 #66B025

tetradic

#2566B0 #B025AC #B06F25 #25B029

square

#2566B0 #B025AC #B06F25 #25B029

split-complementary

#2566B0 #B02925 #ACB025

monochromatic

#102B4B #1A497D #2566B0 #3C84D6 #6FA4E1

Accessibility & contrast

On white

5.82

#2566B0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.61

#2566B0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2566B0

5.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2566B0	#FFFFFF	#000000	##FFFFFF
##2566B0	1.00	5.82	3.61	5.82
#FFFFFF	5.82	1.00	21.00	1.00
#000000	3.61	21.00	1.00	21.00
##FFFFFF	5.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#426CB3

Deuteranopia (green-blind)

#295FAF

Tritanopia (blue-blind)

#007882

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #2566b0;
/* rgb */ color: rgb(37, 102, 176);
/* oklch */ color: oklch(50.8% 0.134 254.3);

Tailwind

colors: {
  custom: {
    50: '#7591c8',
    500: '#2566b0',
    950: '#000000',
  },
}

SCSS

$custom: #2566b0;
$custom-light: #7591c8;
$custom-dark: #000000;

JSON

{
  "hex": "#2566b0",
  "rgb": {
    "r": 37,
    "g": 102,
    "b": 176
  },
  "hsl": {
    "h": 211.942,
    "s": 65.258,
    "l": 41.765
  },
  "oklch": {
    "l": 0.50837,
    "c": 0.13435,
    "h": 254.3
  },
  "luminance": 0.13031
}

Semantic roles & 50–950 ramp

primary

#2566B0

secondary

#C79B6A

accent

#9940E8

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #2566B0

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

Preview Lab → · Contrast checker → · Palette generator →