#5171CF#5171CF

#5171CF is a mid, vivid blue. Relative luminance 0.181; OKLCH L 57.1% C 0.149 H 267.4°. Best body text is #000000 at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#5171CF
RGB	rgb(81, 113, 207)
HSL	hsl(225, 57%, 56%)
HSV	hsv(225, 61%, 81%)
CMYK	cmyk(60.9%, 45.4%, 0%, 18.8%)
CIE-LAB	lab(49.57, 17.49, -52.20)
CIE-LCH	lch(49.57, 55.05, 288.53°)
OKLab	oklab(57.15% -0.0067 -0.149)
OKLCH	oklch(57.15% 0.149 267.4)
XYZ	xyz(20.5571, 18.0628, 61.4225)
Luminance	0.1807 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5171CF #CFAF51

analogous

#51B0CF #5171CF #7051CF

triadic

#5171CF #CF5171 #71CF51

tetradic

#5171CF #CF51B0 #CFAF51 #51CF70

square

#5171CF #CF51B0 #CFAF51 #51CF70

split-complementary

#5171CF #CF7051 #B0CF51

monochromatic

#243C82 #3152B2 #5171CF #8198DC #B1BFE9

Accessibility & contrast

On white

4.55

#5171CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.61

#5171CF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5171CF

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5171CF	#FFFFFF	#000000	##000000
##5171CF	1.00	4.55	4.61	4.61
#FFFFFF	4.55	1.00	21.00	21.00
#000000	4.61	21.00	1.00	1.00
##000000	4.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#447CD3

Deuteranopia (green-blind)

#3071CD

Tritanopia (blue-blind)

#008696

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #5171cf;
/* rgb */ color: rgb(81, 113, 207);
/* oklch */ color: oklch(57.1% 0.149 267.4);

Tailwind

colors: {
  custom: {
    50: '#8d99de',
    500: '#5171cf',
    950: '#000000',
  },
}

SCSS

$custom: #5171cf;
$custom-light: #8d99de;
$custom-dark: #000000;

JSON

{
  "hex": "#5171cf",
  "rgb": {
    "r": 81,
    "g": 113,
    "b": 207
  },
  "hsl": {
    "h": 224.762,
    "s": 56.757,
    "l": 56.471
  },
  "oklch": {
    "l": 0.5715,
    "c": 0.14915,
    "h": 267.4
  },
  "luminance": 0.18065
}

Semantic roles & 50–950 ramp

primary

#5171CF

secondary

#D8CBA4

accent

#B948E0

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0D15

muted

#7E7E83

Preview Lab

Preview with #5171CF

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

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