#2566B7#2566B7

#2566B7 is a mid, vivid cyan. Relative luminance 0.133; OKLCH L 51.3% C 0.144 H 255.9°. Best body text is #FFFFFF at 5.73:1 contrast (WCAG AA passes).

Color values

HEX	#2566B7
RGB	rgb(37, 102, 183)
HSL	hsl(213, 66%, 43%)
HSV	hsv(213, 80%, 72%)
CMYK	cmyk(79.8%, 44.3%, 0%, 28.2%)
CIE-LAB	lab(43.23, 9.12, -48.62)
CIE-LCH	lch(43.23, 49.47, 280.62°)
OKLab	oklab(51.3% -0.0349 -0.1394)
OKLCH	oklch(51.3% 0.144 255.9)
XYZ	xyz(14.0584, 13.3133, 46.6193)
Luminance	0.1331 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2566B7 #B77625

analogous

#25AFB7 #2566B7 #2D25B7

triadic

#2566B7 #B72566 #66B725

tetradic

#2566B7 #B725AF #B77625 #25B72D

square

#2566B7 #B725AF #B77625 #25B72D

split-complementary

#2566B7 #B72D25 #AFB725

monochromatic

#102D51 #1B4A84 #2566B7 #4184D9 #74A5E3

Accessibility & contrast

On white

5.73

#2566B7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.66

#2566B7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2566B7

5.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2566B7	#FFFFFF	#000000	##FFFFFF
##2566B7	1.00	5.73	3.66	5.73
#FFFFFF	5.73	1.00	21.00	1.00
#000000	3.66	21.00	1.00	21.00
##FFFFFF	5.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C6DBA

Deuteranopia (green-blind)

#1E60B5

Tritanopia (blue-blind)

#007985

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #2566b7;
/* rgb */ color: rgb(37, 102, 183);
/* oklch */ color: oklch(51.3% 0.144 255.9);

Tailwind

colors: {
  custom: {
    50: '#7691cd',
    500: '#2566b7',
    950: '#000000',
  },
}

SCSS

$custom: #2566b7;
$custom-light: #7691cd;
$custom-dark: #000000;

JSON

{
  "hex": "#2566b7",
  "rgb": {
    "r": 37,
    "g": 102,
    "b": 183
  },
  "hsl": {
    "h": 213.288,
    "s": 66.364,
    "l": 43.137
  },
  "oklch": {
    "l": 0.51304,
    "c": 0.14367,
    "h": 255.9
  },
  "luminance": 0.13315
}

Semantic roles & 50–950 ramp

primary

#2566B7

secondary

#CAA16E

accent

#9D3FE9

background

#F7F8FC

surface

#EEF0F9

border

#C9CBD2

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #2566B7

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

Preview Lab → · Contrast checker → · Palette generator →