#5181CE#5181CE

#5181CE is a mid, vivid blue. Relative luminance 0.219; OKLCH L 60.5% C 0.129 H 259.5°. Best body text is #000000 at 5.38:1 contrast (WCAG AA passes).

Color values

HEX	#5181CE
RGB	rgb(81, 129, 206)
HSL	hsl(217, 56%, 56%)
HSV	hsv(217, 61%, 81%)
CMYK	cmyk(60.7%, 37.4%, 0%, 19.2%)
CIE-LAB	lab(53.93, 7.35, -44.70)
CIE-LCH	lch(53.93, 45.30, 279.34°)
OKLab	oklab(60.49% -0.0236 -0.1268)
OKLCH	oklch(60.49% 0.129 259.5)
XYZ	xyz(22.3803, 21.9041, 61.4291)
Luminance	0.2191 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181CE #CE9E51

analogous

#51C0CE #5181CE #6051CE

triadic

#5181CE #CE5181 #81CE51

tetradic

#5181CE #CE51C0 #CE9E51 #51CE60

square

#5181CE #CE51C0 #CE9E51 #51CE60

split-complementary

#5181CE #CE6051 #C0CE51

monochromatic

#244880 #3262B0 #5181CE #81A4DB #B1C6E9

Accessibility & contrast

On white

3.90

#5181CE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.38

#5181CE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181CE

5.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181CE	#FFFFFF	#000000	##000000
##5181CE	1.00	3.90	5.38	5.38
#FFFFFF	3.90	1.00	21.00	21.00
#000000	5.38	21.00	1.00	1.00
##000000	5.38	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6087D1

Deuteranopia (green-blind)

#4F7CCC

Tritanopia (blue-blind)

#00929E

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #5181ce;
/* rgb */ color: rgb(81, 129, 206);
/* oklch */ color: oklch(60.5% 0.129 259.5);

Tailwind

colors: {
  custom: {
    50: '#8ca5dd',
    500: '#5181ce',
    950: '#000000',
  },
}

SCSS

$custom: #5181ce;
$custom-light: #8ca5dd;
$custom-dark: #000000;

JSON

{
  "hex": "#5181ce",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 206
  },
  "hsl": {
    "h": 216.96,
    "s": 56.054,
    "l": 56.275
  },
  "oklch": {
    "l": 0.60489,
    "c": 0.129,
    "h": 259.5
  },
  "luminance": 0.21906
}

Semantic roles & 50–950 ramp

primary

#5181CE

secondary

#D7C3A4

accent

#A548DF

background

#F9FAFD

surface

#F1F4FB

border

#CBCED4

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #5181CE

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

Preview Lab → · Contrast checker → · Palette generator →