#2563B0#2563B0

#2563B0 is a mid, vivid cyan. Relative luminance 0.125; OKLCH L 50.1% C 0.138 H 255.8°. Best body text is #FFFFFF at 6.02:1 contrast (WCAG AA passes).

Color values

HEX	#2563B0
RGB	rgb(37, 99, 176)
HSL	hsl(213, 65%, 42%)
HSV	hsv(213, 79%, 69%)
CMYK	cmyk(79%, 43.8%, 0%, 31%)
CIE-LAB	lab(41.92, 8.33, -46.62)
CIE-LCH	lch(41.92, 47.36, 280.14°)
OKLab	oklab(50.15% -0.0338 -0.1335)
OKLCH	oklch(50.15% 0.138 255.8)
XYZ	xyz(13.0584, 12.4500, 42.7807)
Luminance	0.1245 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2563B0 #B07225

analogous

#25A9B0 #2563B0 #2C25B0

triadic

#2563B0 #B02563 #63B025

tetradic

#2563B0 #B025A9 #B07225 #25B02C

square

#2563B0 #B025A9 #B07225 #25B02C

split-complementary

#2563B0 #B02C25 #A9B025

monochromatic

#102A4B #1A477D #2563B0 #3C81D6 #6FA2E1

Accessibility & contrast

On white

6.02

#2563B0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.49

#2563B0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2563B0

6.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2563B0	#FFFFFF	#000000	##FFFFFF
##2563B0	1.00	6.02	3.49	6.02
#FFFFFF	6.02	1.00	21.00	1.00
#000000	3.49	21.00	1.00	21.00
##FFFFFF	6.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C6AB3

Deuteranopia (green-blind)

#215DAE

Tritanopia (blue-blind)

#007581

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #2563b0;
/* rgb */ color: rgb(37, 99, 176);
/* oklch */ color: oklch(50.1% 0.138 255.8);

Tailwind

colors: {
  custom: {
    50: '#758ec8',
    500: '#2563b0',
    950: '#000000',
  },
}

SCSS

$custom: #2563b0;
$custom-light: #758ec8;
$custom-dark: #000000;

JSON

{
  "hex": "#2563b0",
  "rgb": {
    "r": 37,
    "g": 99,
    "b": 176
  },
  "hsl": {
    "h": 213.237,
    "s": 65.258,
    "l": 41.765
  },
  "oklch": {
    "l": 0.5015,
    "c": 0.13776,
    "h": 255.8
  },
  "luminance": 0.12452
}

Semantic roles & 50–950 ramp

primary

#2563B0

secondary

#C79D6A

accent

#9D40E8

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #2563B0

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

Preview Lab → · Contrast checker → · Palette generator →