#2163B3#2163B3

#2163B3 is a mid, vivid cyan. Relative luminance 0.125; OKLCH L 50.2% C 0.143 H 255.7°. Best body text is #FFFFFF at 6.00:1 contrast (WCAG AA passes).

Color values

HEX	#2163B3
RGB	rgb(33, 99, 179)
HSL	hsl(213, 69%, 42%)
HSV	hsv(213, 82%, 70%)
CMYK	cmyk(81.6%, 44.7%, 0%, 29.8%)
CIE-LAB	lab(42.00, 9.08, -48.26)
CIE-LCH	lch(42.00, 49.11, 280.65°)
OKLab	oklab(50.24% -0.0354 -0.1384)
OKLCH	oklch(50.24% 0.143 255.7)
XYZ	xyz(13.2227, 12.5001, 44.3549)
Luminance	0.1250 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2163B3 #B37121

analogous

#21ACB3 #2163B3 #2821B3

triadic

#2163B3 #B32163 #63B321

tetradic

#2163B3 #B321AC #B37121 #21B328

square

#2163B3 #B321AC #B37121 #21B328

split-complementary

#2163B3 #B32821 #ACB321

monochromatic

#0E2A4C #17467F #2163B3 #3781DA #6BA1E4

Accessibility & contrast

On white

6.00

#2163B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.50

#2163B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2163B3

6.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2163B3	#FFFFFF	#000000	##FFFFFF
##2163B3	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)

#396AB6

Deuteranopia (green-blind)

#1A5DB1

Tritanopia (blue-blind)

#007682

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #2163b3;
/* rgb */ color: rgb(33, 99, 179);
/* oklch */ color: oklch(50.2% 0.143 255.7);

Tailwind

colors: {
  custom: {
    50: '#748eca',
    500: '#2163b3',
    950: '#000000',
  },
}

SCSS

$custom: #2163b3;
$custom-light: #748eca;
$custom-dark: #000000;

JSON

{
  "hex": "#2163b3",
  "rgb": {
    "r": 33,
    "g": 99,
    "b": 179
  },
  "hsl": {
    "h": 212.877,
    "s": 68.868,
    "l": 41.569
  },
  "oklch": {
    "l": 0.50239,
    "c": 0.14288,
    "h": 255.7
  },
  "luminance": 0.12502
}

Semantic roles & 50–950 ramp

primary

#2163B3

secondary

#CA9D66

accent

#9C3CEC

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #2163B3

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

Preview Lab → · Contrast checker → · Palette generator →