#2563B1#2563B1

#2563B1 is a mid, vivid cyan. Relative luminance 0.125; OKLCH L 50.2% C 0.139 H 256.0°. Best body text is #FFFFFF at 6.00:1 contrast (WCAG AA passes).

Color values

HEX	#2563B1
RGB	rgb(37, 99, 177)
HSL	hsl(213, 65%, 42%)
HSV	hsv(213, 79%, 69%)
CMYK	cmyk(79.1%, 44.1%, 0%, 30.6%)
CIE-LAB	lab(41.98, 8.72, -47.11)
CIE-LCH	lch(41.98, 47.91, 280.49°)
OKLab	oklab(50.22% -0.0336 -0.135)
OKLCH	oklch(50.22% 0.139 256)
XYZ	xyz(13.1577, 12.4898, 43.3037)
Luminance	0.1249 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2563B1 #B17325

analogous

#25A9B1 #2563B1 #2D25B1

triadic

#2563B1 #B12563 #63B125

tetradic

#2563B1 #B125A9 #B17325 #25B12D

square

#2563B1 #B125A9 #B17325 #25B12D

split-complementary

#2563B1 #B12D25 #A9B125

monochromatic

#102A4C #1A477E #2563B1 #3D81D6 #6FA2E1

Accessibility & contrast

On white

6.00

#2563B1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.50

#2563B1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2563B1

6.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2563B1	#FFFFFF	#000000	##FFFFFF
##2563B1	1.00	6.00	3.50	6.00
#FFFFFF	6.00	1.00	21.00	1.00
#000000	3.50	21.00	1.00	21.00
##FFFFFF	6.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B6AB4

Deuteranopia (green-blind)

#1F5DAF

Tritanopia (blue-blind)

#007681

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #2563b1;
/* rgb */ color: rgb(37, 99, 177);
/* oklch */ color: oklch(50.2% 0.139 256.0);

Tailwind

colors: {
  custom: {
    50: '#758ec9',
    500: '#2563b1',
    950: '#000000',
  },
}

SCSS

$custom: #2563b1;
$custom-light: #758ec9;
$custom-dark: #000000;

JSON

{
  "hex": "#2563b1",
  "rgb": {
    "r": 37,
    "g": 99,
    "b": 177
  },
  "hsl": {
    "h": 213.429,
    "s": 65.421,
    "l": 41.961
  },
  "oklch": {
    "l": 0.50218,
    "c": 0.1391,
    "h": 256
  },
  "luminance": 0.12491
}

Semantic roles & 50–950 ramp

primary

#2563B1

secondary

#C89E6A

accent

#9E3FE8

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #2563B1

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

Preview Lab → · Contrast checker → · Palette generator →