#1663D3#1663D3

#1663D3 is a mid, vivid blue. Relative luminance 0.138; OKLCH L 52.4% C 0.187 H 259.1°. Best body text is #FFFFFF at 5.59:1 contrast (WCAG AA passes).

Color values

HEX	#1663D3
RGB	rgb(22, 99, 211)
HSL	hsl(216, 81%, 46%)
HSV	hsv(216, 90%, 83%)
CMYK	cmyk(89.6%, 53.1%, 0%, 17.3%)
CIE-LAB	lab(43.94, 20.83, -63.67)
CIE-LCH	lch(43.94, 66.99, 288.12°)
OKLab	oklab(52.35% -0.0353 -0.1839)
OKLCH	oklch(52.35% 0.187 259.1)
XYZ	xyz(16.5463, 13.7952, 63.4060)
Luminance	0.1380 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1663D3 #D38616

analogous

#16C1D3 #1663D3 #2816D3

triadic

#1663D3 #D31663 #63D316

tetradic

#1663D3 #D316C1 #D38616 #16D328

square

#1663D3 #D316C1 #D38616 #16D328

split-complementary

#1663D3 #D32816 #C1D316

monochromatic

#0A2F64 #10499C #1663D3 #3C83EB #73A6F0

Accessibility & contrast

On white

5.59

#1663D3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.76

#1663D3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1663D3

5.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1663D3	#FFFFFF	#000000	##FFFFFF
##1663D3	1.00	5.59	3.76	5.59
#FFFFFF	5.59	1.00	21.00	1.00
#000000	3.76	21.00	1.00	21.00
##FFFFFF	5.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0071D7

Deuteranopia (green-blind)

#0060D1

Tritanopia (blue-blind)

#007F91

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #1663d3;
/* rgb */ color: rgb(22, 99, 211);
/* oklch */ color: oklch(52.4% 0.187 259.1);

Tailwind

colors: {
  custom: {
    50: '#7a8ee1',
    500: '#1663d3',
    950: '#000000',
  },
}

SCSS

$custom: #1663d3;
$custom-light: #7a8ee1;
$custom-dark: #000000;

JSON

{
  "hex": "#1663d3",
  "rgb": {
    "r": 22,
    "g": 99,
    "b": 211
  },
  "hsl": {
    "h": 215.556,
    "s": 81.116,
    "l": 45.686
  },
  "oklch": {
    "l": 0.52354,
    "c": 0.18722,
    "h": 259.1
  },
  "luminance": 0.13797
}

Semantic roles & 50–950 ramp

primary

#1663D3

secondary

#D7AC6E

accent

#A630F8

background

#F8F8FD

surface

#EFF0FB

border

#CACBD4

text

#0B0C15

muted

#7C7D83

Preview Lab

Preview with #1663D3

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

Preview Lab → · Contrast checker → · Palette generator →