#5171CB#5171CB

#5171CB is a mid, vivid blue. Relative luminance 0.179; OKLCH L 56.9% C 0.144 H 267.1°. Best body text is #FFFFFF at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#5171CB
RGB	rgb(81, 113, 203)
HSL	hsl(224, 54%, 56%)
HSV	hsv(224, 60%, 80%)
CMYK	cmyk(60.1%, 44.3%, 0%, 20.4%)
CIE-LAB	lab(49.34, 16.14, -50.29)
CIE-LCH	lch(49.34, 52.82, 287.79°)
OKLab	oklab(56.89% -0.0073 -0.1434)
OKLCH	oklch(56.89% 0.144 267.1)
XYZ	xyz(20.0743, 17.8697, 58.8797)
Luminance	0.1787 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5171CB #CBAB51

analogous

#51AECB #5171CB #6E51CB

triadic

#5171CB #CB5171 #71CB51

tetradic

#5171CB #CB51AE #CBAB51 #51CB6E

square

#5171CB #CB51AE #CBAB51 #51CB6E

split-complementary

#5171CB #CB6E51 #AECB51

monochromatic

#253C7C #3353AC #5171CB #8097D9 #AFBEE7

Accessibility & contrast

On white

4.59

#5171CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.57

#5171CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #5171CB

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5171CB	#FFFFFF	#000000	##FFFFFF
##5171CB	1.00	4.59	4.57	4.59
#FFFFFF	4.59	1.00	21.00	1.00
#000000	4.57	21.00	1.00	21.00
##FFFFFF	4.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#487BCE

Deuteranopia (green-blind)

#3570C9

Tritanopia (blue-blind)

#008594

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #5171cb;
/* rgb */ color: rgb(81, 113, 203);
/* oklch */ color: oklch(56.9% 0.144 267.1);

Tailwind

colors: {
  custom: {
    50: '#8c99db',
    500: '#5171cb',
    950: '#000000',
  },
}

SCSS

$custom: #5171cb;
$custom-light: #8c99db;
$custom-dark: #000000;

JSON

{
  "hex": "#5171cb",
  "rgb": {
    "r": 81,
    "g": 113,
    "b": 203
  },
  "hsl": {
    "h": 224.262,
    "s": 53.982,
    "l": 55.686
  },
  "oklch": {
    "l": 0.56894,
    "c": 0.14358,
    "h": 267.1
  },
  "luminance": 0.17871
}

Semantic roles & 50–950 ramp

primary

#5171CB

secondary

#D5C8A3

accent

#B74ADD

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0D15

muted

#7E7E83

Preview Lab

Preview with #5171CB

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

Preview Lab → · Contrast checker → · Palette generator →