#5173BB#5173BB

#5173BB is a mid, moderate blue. Relative luminance 0.176; OKLCH L 56.3% C 0.119 H 263.9°. Best body text is #FFFFFF at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#5173BB
RGB	rgb(81, 115, 187)
HSL	hsl(221, 44%, 53%)
HSV	hsv(221, 57%, 73%)
CMYK	cmyk(56.7%, 38.5%, 0%, 26.7%)
CIE-LAB	lab(49.00, 9.53, -41.63)
CIE-LCH	lch(49.00, 42.71, 282.89°)
OKLab	oklab(56.35% -0.0126 -0.118)
OKLCH	oklch(56.35% 0.119 263.9)
XYZ	xyz(18.4907, 17.5972, 49.4263)
Luminance	0.1760 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5173BB #BB9951

analogous

#51A8BB #5173BB #6451BB

triadic

#5173BB #BB5173 #73BB51

tetradic

#5173BB #BB51A8 #BB9951 #51BB64

square

#5173BB #BB51A8 #BB9951 #51BB64

split-complementary

#5173BB #BB6451 #A8BB51

monochromatic

#293D69 #3A5795 #5173BB #7D96CC #A9BADD

Accessibility & contrast

On white

4.65

#5173BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.52

#5173BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #5173BB

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5173BB	#FFFFFF	#000000	##FFFFFF
##5173BB	1.00	4.65	4.52	4.65
#FFFFFF	4.65	1.00	21.00	1.00
#000000	4.52	21.00	1.00	21.00
##FFFFFF	4.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#557ABE

Deuteranopia (green-blind)

#4870B9

Tritanopia (blue-blind)

#04838E

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #5173bb;
/* rgb */ color: rgb(81, 115, 187);
/* oklch */ color: oklch(56.3% 0.119 263.9);

Tailwind

colors: {
  custom: {
    50: '#8a9ad0',
    500: '#5173bb',
    950: '#000000',
  },
}

SCSS

$custom: #5173bb;
$custom-light: #8a9ad0;
$custom-dark: #000000;

JSON

{
  "hex": "#5173bb",
  "rgb": {
    "r": 81,
    "g": 115,
    "b": 187
  },
  "hsl": {
    "h": 220.755,
    "s": 43.802,
    "l": 52.549
  },
  "oklch": {
    "l": 0.56349,
    "c": 0.11867,
    "h": 263.9
  },
  "luminance": 0.17599
}

Semantic roles & 50–950 ramp

primary

#5173BB

secondary

#CBBC9D

accent

#AB54D4

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0E14

muted

#7D7E82

Preview Lab

Preview with #5173BB

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

Preview Lab → · Contrast checker → · Palette generator →