#5181DD#5181DD

#5181DD is a mid, vivid blue. Relative luminance 0.227; OKLCH L 61.4% C 0.149 H 262.1°. Best body text is #000000 at 5.53:1 contrast (WCAG AA passes).

Color values

HEX	#5181DD
RGB	rgb(81, 129, 221)
HSL	hsl(219, 67%, 59%)
HSV	hsv(219, 63%, 87%)
CMYK	cmyk(63.3%, 41.6%, 0%, 13.3%)
CIE-LAB	lab(54.73, 12.43, -51.88)
CIE-LCH	lch(54.73, 53.35, 283.48°)
OKLab	oklab(61.37% -0.0204 -0.1479)
OKLCH	oklch(61.37% 0.149 262.1)
XYZ	xyz(24.2902, 22.6680, 71.4879)
Luminance	0.2267 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181DD #DDAD51

analogous

#51C7DD #5181DD #6751DD

triadic

#5181DD #DD5181 #81DD51

tetradic

#5181DD #DD51C7 #DDAD51 #51DD67

square

#5181DD #DD51C7 #DDAD51 #51DD67

split-complementary

#5181DD #DD6751 #C7DD51

monochromatic

#1D4796 #275FC9 #5181DD #84A6E7 #B7CBF1

Accessibility & contrast

On white

3.79

#5181DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.53

#5181DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181DD

5.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181DD	#FFFFFF	#000000	##000000
##5181DD	1.00	3.79	5.53	5.53
#FFFFFF	3.79	1.00	21.00	21.00
#000000	5.53	21.00	1.00	1.00
##000000	5.53	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#578AE1

Deuteranopia (green-blind)

#427DDB

Tritanopia (blue-blind)

#0096A4

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #5181dd;
/* rgb */ color: rgb(81, 129, 221);
/* oklch */ color: oklch(61.4% 0.149 262.1);

Tailwind

colors: {
  custom: {
    50: '#8ea5e8',
    500: '#5181dd',
    950: '#000000',
  },
}

SCSS

$custom: #5181dd;
$custom-light: #8ea5e8;
$custom-dark: #000000;

JSON

{
  "hex": "#5181dd",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 221
  },
  "hsl": {
    "h": 219.429,
    "s": 67.308,
    "l": 59.216
  },
  "oklch": {
    "l": 0.61373,
    "c": 0.14926,
    "h": 262.1
  },
  "luminance": 0.2267
}

Semantic roles & 50–950 ramp

primary

#5181DD

secondary

#E0CEAA

accent

#AF3EEA

background

#F9FAFE

surface

#F2F4FD

border

#CCCED5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #5181DD

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

Preview Lab → · Contrast checker → · Palette generator →