#5173CB#5173CB

#5173CB is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.3% C 0.141 H 266.2°. Best body text is #000000 at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#5173CB
RGB	rgb(81, 115, 203)
HSL	hsl(223, 54%, 56%)
HSV	hsv(223, 60%, 80%)
CMYK	cmyk(60.1%, 43.3%, 0%, 20.4%)
CIE-LAB	lab(49.88, 14.90, -49.42)
CIE-LCH	lch(49.88, 51.62, 286.77°)
OKLab	oklab(57.31% -0.0094 -0.1408)
OKLCH	oklch(57.31% 0.141 266.2)
XYZ	xyz(20.2999, 18.3209, 58.9549)
Luminance	0.1832 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5173CB #CBA951

analogous

#51B0CB #5173CB #6C51CB

triadic

#5173CB #CB5173 #73CB51

tetradic

#5173CB #CB51B0 #CBA951 #51CB6C

square

#5173CB #CB51B0 #CBA951 #51CB6C

split-complementary

#5173CB #CB6C51 #B0CB51

monochromatic

#253D7C #3355AC #5173CB #8099D9 #AFBFE7

Accessibility & contrast

On white

4.50

#5173CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.66

#5173CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5173CB

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5173CB	#FFFFFF	#000000	##000000
##5173CB	1.00	4.50	4.66	4.66
#FFFFFF	4.50	1.00	21.00	21.00
#000000	4.66	21.00	1.00	1.00
##000000	4.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B7DCE

Deuteranopia (green-blind)

#3A71C9

Tritanopia (blue-blind)

#008795

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #5173cb;
/* rgb */ color: rgb(81, 115, 203);
/* oklch */ color: oklch(57.3% 0.141 266.2);

Tailwind

colors: {
  custom: {
    50: '#8c9adb',
    500: '#5173cb',
    950: '#000000',
  },
}

SCSS

$custom: #5173cb;
$custom-light: #8c9adb;
$custom-dark: #000000;

JSON

{
  "hex": "#5173cb",
  "rgb": {
    "r": 81,
    "g": 115,
    "b": 203
  },
  "hsl": {
    "h": 223.279,
    "s": 53.982,
    "l": 55.686
  },
  "oklch": {
    "l": 0.57313,
    "c": 0.14113,
    "h": 266.2
  },
  "luminance": 0.18323
}

Semantic roles & 50–950 ramp

primary

#5173CB

secondary

#D5C7A3

accent

#B44ADD

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #5173CB

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

Preview Lab → · Contrast checker → · Palette generator →