#5181CD#5181CD

#5181CD is a mid, vivid blue. Relative luminance 0.219; OKLCH L 60.4% C 0.128 H 259.2°. Best body text is #000000 at 5.37:1 contrast (WCAG AA passes).

Color values

HEX	#5181CD
RGB	rgb(81, 129, 205)
HSL	hsl(217, 55%, 56%)
HSV	hsv(217, 60%, 80%)
CMYK	cmyk(60.5%, 37.1%, 0%, 19.6%)
CIE-LAB	lab(53.87, 7.02, -44.21)
CIE-LCH	lch(53.87, 44.77, 279.02°)
OKLab	oklab(60.43% -0.0238 -0.1254)
OKLCH	oklch(60.43% 0.128 259.2)
XYZ	xyz(22.2592, 21.8556, 60.7913)
Luminance	0.2186 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181CD #CD9D51

analogous

#51BFCD #5181CD #5F51CD

triadic

#5181CD #CD5181 #81CD51

tetradic

#5181CD #CD51BF #CD9D51 #51CD5F

square

#5181CD #CD51BF #CD9D51 #51CD5F

split-complementary

#5181CD #CD5F51 #BFCD51

monochromatic

#25487F #3262AF #5181CD #81A3DB #B0C6E8

Accessibility & contrast

On white

3.91

#5181CD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.37

#5181CD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181CD

5.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181CD	#FFFFFF	#000000	##000000
##5181CD	1.00	3.91	5.37	5.37
#FFFFFF	3.91	1.00	21.00	21.00
#000000	5.37	21.00	1.00	1.00
##000000	5.37	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6187D0

Deuteranopia (green-blind)

#507BCB

Tritanopia (blue-blind)

#00929D

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #5181cd;
/* rgb */ color: rgb(81, 129, 205);
/* oklch */ color: oklch(60.4% 0.128 259.2);

Tailwind

colors: {
  custom: {
    50: '#8ca5dc',
    500: '#5181cd',
    950: '#000000',
  },
}

SCSS

$custom: #5181cd;
$custom-light: #8ca5dc;
$custom-dark: #000000;

JSON

{
  "hex": "#5181cd",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 205
  },
  "hsl": {
    "h": 216.774,
    "s": 55.357,
    "l": 56.078
  },
  "oklch": {
    "l": 0.60432,
    "c": 0.12765,
    "h": 259.2
  },
  "luminance": 0.21858
}

Semantic roles & 50–950 ramp

primary

#5181CD

secondary

#D7C3A3

accent

#A549DF

background

#F9FAFD

surface

#F1F4FB

border

#CBCED4

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #5181CD

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

Preview Lab → · Contrast checker → · Palette generator →