#5181E6#5181E6

#5181E6 is a mid, vivid blue. Relative luminance 0.232; OKLCH L 61.9% C 0.161 H 263.3°. Best body text is #000000 at 5.63:1 contrast (WCAG AA passes).

Color values

HEX	#5181E6
RGB	rgb(81, 129, 230)
HSL	hsl(221, 75%, 61%)
HSV	hsv(221, 65%, 90%)
CMYK	cmyk(64.8%, 43.9%, 0%, 9.8%)
CIE-LAB	lab(55.24, 15.51, -56.11)
CIE-LCH	lch(55.24, 58.22, 285.46°)
OKLab	oklab(61.93% -0.0188 -0.1603)
OKLCH	oklch(61.93% 0.161 263.3)
XYZ	xyz(25.5215, 23.1606, 77.9730)
Luminance	0.2316 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181E6 #E6B651

analogous

#51CBE6 #5181E6 #6B51E6

triadic

#5181E6 #E65181 #81E651

tetradic

#5181E6 #E651CB #E6B651 #51E66B

square

#5181E6 #E651CB #E6B651 #51E66B

split-complementary

#5181E6 #E66B51 #CBE651

monochromatic

#1845A5 #1F5CDA #5181E6 #87A8EE #BCCEF5

Accessibility & contrast

On white

3.73

#5181E6 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.63

#5181E6 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181E6

5.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181E6	#FFFFFF	#000000	##000000
##5181E6	1.00	3.73	5.63	5.63
#FFFFFF	3.73	1.00	21.00	21.00
#000000	5.63	21.00	1.00	1.00
##000000	5.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#518CEA

Deuteranopia (green-blind)

#377EE4

Tritanopia (blue-blind)

#0098A8

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #5181e6;
/* rgb */ color: rgb(81, 129, 230);
/* oklch */ color: oklch(61.9% 0.161 263.3);

Tailwind

colors: {
  custom: {
    50: '#90a5ee',
    500: '#5181e6',
    950: '#000000',
  },
}

SCSS

$custom: #5181e6;
$custom-light: #90a5ee;
$custom-dark: #000000;

JSON

{
  "hex": "#5181e6",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 230
  },
  "hsl": {
    "h": 220.671,
    "s": 74.874,
    "l": 60.98
  },
  "oklch": {
    "l": 0.6193,
    "c": 0.16138,
    "h": 263.3
  },
  "luminance": 0.23163
}

Semantic roles & 50–950 ramp

primary

#5181E6

secondary

#E5D3AD

accent

#960ED7

background

#F9FAFE

surface

#F2F4FD

border

#CCCED5

text

#0E0F16

muted

#7E7F84

Preview Lab

Preview with #5181E6

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

Preview Lab → · Contrast checker → · Palette generator →