#5173CC#5173CC

#5173CC is a mid, vivid blue. Relative luminance 0.184; OKLCH L 57.4% C 0.143 H 266.3°. Best body text is #000000 at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#5173CC
RGB	rgb(81, 115, 204)
HSL	hsl(223, 55%, 56%)
HSV	hsv(223, 60%, 80%)
CMYK	cmyk(60.3%, 43.6%, 0%, 20%)
CIE-LAB	lab(49.94, 15.23, -49.90)
CIE-LCH	lch(49.94, 52.17, 286.98°)
OKLab	oklab(57.38% -0.0093 -0.1422)
OKLCH	oklch(57.38% 0.143 266.3)
XYZ	xyz(20.4194, 18.3687, 59.5845)
Luminance	0.1837 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5173CC #CCAA51

analogous

#51B0CC #5173CC #6C51CC

triadic

#5173CC #CC5173 #73CC51

tetradic

#5173CC #CC51B0 #CCAA51 #51CC6C

square

#5173CC #CC51B0 #CCAA51 #51CC6C

split-complementary

#5173CC #CC6C51 #B0CC51

monochromatic

#253D7E #3355AD #5173CC #8099DA #B0BFE8

Accessibility & contrast

On white

4.49

#5173CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.67

#5173CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5173CC

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5173CC	#FFFFFF	#000000	##000000
##5173CC	1.00	4.49	4.67	4.67
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.67	21.00	1.00	1.00
##000000	4.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A7DCF

Deuteranopia (green-blind)

#3872CA

Tritanopia (blue-blind)

#008795

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #5173cc;
/* rgb */ color: rgb(81, 115, 204);
/* oklch */ color: oklch(57.4% 0.143 266.3);

Tailwind

colors: {
  custom: {
    50: '#8c9adc',
    500: '#5173cc',
    950: '#000000',
  },
}

SCSS

$custom: #5173cc;
$custom-light: #8c9adc;
$custom-dark: #000000;

JSON

{
  "hex": "#5173cc",
  "rgb": {
    "r": 81,
    "g": 115,
    "b": 204
  },
  "hsl": {
    "h": 223.415,
    "s": 54.667,
    "l": 55.882
  },
  "oklch": {
    "l": 0.57375,
    "c": 0.14252,
    "h": 266.3
  },
  "luminance": 0.1837
}

Semantic roles & 50–950 ramp

primary

#5173CC

secondary

#D6C8A3

accent

#B54ADE

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #5173CC

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

Preview Lab → · Contrast checker → · Palette generator →