#5181E0#5181E0

#5181E0 is a mid, vivid blue. Relative luminance 0.228; OKLCH L 61.6% C 0.153 H 262.6°. Best body text is #000000 at 5.57:1 contrast (WCAG AA passes).

Color values

HEX	#5181E0
RGB	rgb(81, 129, 224)
HSL	hsl(220, 70%, 60%)
HSV	hsv(220, 64%, 88%)
CMYK	cmyk(63.8%, 42.4%, 0%, 12.2%)
CIE-LAB	lab(54.90, 13.46, -53.30)
CIE-LCH	lch(54.90, 54.97, 284.17°)
OKLab	oklab(61.56% -0.0198 -0.152)
OKLCH	oklch(61.56% 0.153 262.6)
XYZ	xyz(24.6934, 22.8293, 73.6117)
Luminance	0.2283 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181E0 #E0B051

analogous

#51C9E0 #5181E0 #6951E0

triadic

#5181E0 #E05181 #81E051

tetradic

#5181E0 #E051C9 #E0B051 #51E069

square

#5181E0 #E051C9 #E0B051 #51E069

split-complementary

#5181E0 #E06951 #C9E051

monochromatic

#1C469B #255ECF #5181E0 #85A7E9 #B9CCF3

Accessibility & contrast

On white

3.77

#5181E0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.57

#5181E0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181E0

5.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181E0	#FFFFFF	#000000	##000000
##5181E0	1.00	3.77	5.57	5.57
#FFFFFF	3.77	1.00	21.00	21.00
#000000	5.57	21.00	1.00	1.00
##000000	5.57	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#558AE4

Deuteranopia (green-blind)

#3F7DDE

Tritanopia (blue-blind)

#0097A5

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #5181e0;
/* rgb */ color: rgb(81, 129, 224);
/* oklch */ color: oklch(61.6% 0.153 262.6);

Tailwind

colors: {
  custom: {
    50: '#8fa5ea',
    500: '#5181e0',
    950: '#000000',
  },
}

SCSS

$custom: #5181e0;
$custom-light: #8fa5ea;
$custom-dark: #000000;

JSON

{
  "hex": "#5181e0",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 224
  },
  "hsl": {
    "h": 219.86,
    "s": 69.756,
    "l": 59.804
  },
  "oklch": {
    "l": 0.61556,
    "c": 0.15331,
    "h": 262.6
  },
  "luminance": 0.22832
}

Semantic roles & 50–950 ramp

primary

#5181E0

secondary

#E2CFAB

accent

#B13BED

background

#F9FAFE

surface

#F2F4FD

border

#CCCED5

text

#0E0F16

muted

#7E7F84

Preview Lab

Preview with #5181E0

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

Preview Lab → · Contrast checker → · Palette generator →