#5181E3#5181E3

#5181E3 is a mid, vivid blue. Relative luminance 0.230; OKLCH L 61.7% C 0.157 H 263.0°. Best body text is #000000 at 5.60:1 contrast (WCAG AA passes).

Color values

HEX	#5181E3
RGB	rgb(81, 129, 227)
HSL	hsl(220, 72%, 60%)
HSV	hsv(220, 64%, 89%)
CMYK	cmyk(64.3%, 43.2%, 0%, 11%)
CIE-LAB	lab(55.07, 14.48, -54.71)
CIE-LCH	lch(55.07, 56.59, 284.83°)
OKLab	oklab(61.74% -0.0193 -0.1562)
OKLCH	oklch(61.74% 0.157 263)
XYZ	xyz(25.1039, 22.9935, 75.7734)
Luminance	0.2300 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181E3 #E3B351

analogous

#51CAE3 #5181E3 #6A51E3

triadic

#5181E3 #E35181 #81E351

tetradic

#5181E3 #E351CA #E3B351 #51E36A

square

#5181E3 #E351CA #E3B351 #51E36A

split-complementary

#5181E3 #E36A51 #CAE351

monochromatic

#1A46A0 #225DD5 #5181E3 #86A7EB #BACDF4

Accessibility & contrast

On white

3.75

#5181E3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.60

#5181E3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181E3

5.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181E3	#FFFFFF	#000000	##000000
##5181E3	1.00	3.75	5.60	5.60
#FFFFFF	3.75	1.00	21.00	21.00
#000000	5.60	21.00	1.00	1.00
##000000	5.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#538BE7

Deuteranopia (green-blind)

#3B7EE1

Tritanopia (blue-blind)

#0097A7

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #5181e3;
/* rgb */ color: rgb(81, 129, 227);
/* oklch */ color: oklch(61.7% 0.157 263.0);

Tailwind

colors: {
  custom: {
    50: '#8fa5ec',
    500: '#5181e3',
    950: '#000000',
  },
}

SCSS

$custom: #5181e3;
$custom-light: #8fa5ec;
$custom-dark: #000000;

JSON

{
  "hex": "#5181e3",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 227
  },
  "hsl": {
    "h": 220.274,
    "s": 72.277,
    "l": 60.392
  },
  "oklch": {
    "l": 0.61742,
    "c": 0.15735,
    "h": 263
  },
  "luminance": 0.22996
}

Semantic roles & 50–950 ramp

primary

#5181E3

secondary

#E4D1AC

accent

#9411D4

background

#F9FAFE

surface

#F2F4FD

border

#CCCED5

text

#0E0F16

muted

#7E7F84

Preview Lab

Preview with #5181E3

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

Preview Lab → · Contrast checker → · Palette generator →