#5181FF#5181FF

#5181FF is a light, vivid blue. Relative luminance 0.247; OKLCH L 63.6% C 0.195 H 265.5°. Best body text is #000000 at 5.93:1 contrast (WCAG AA passes).

Color values

HEX	#5181FF
RGB	rgb(81, 129, 255)
HSL	hsl(223, 100%, 66%)
HSV	hsv(223, 68%, 100%)
CMYK	cmyk(68.2%, 49.4%, 0%, 0%)
CIE-LAB	lab(56.75, 24.14, -67.54)
CIE-LCH	lch(56.75, 71.73, 289.67°)
OKLab	oklab(63.57% -0.0153 -0.1939)
OKLCH	oklch(63.57% 0.195 265.5)
XYZ	xyz(29.2873, 24.6669, 97.8061)
Luminance	0.2467 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181FF #FFCF51

analogous

#51D8FF #5181FF #7851FF

triadic

#5181FF #FF5181 #81FF51

tetradic

#5181FF #FF51D8 #FFCF51 #51FF78

square

#5181FF #FF51D8 #FFCF51 #51FF78

split-complementary

#5181FF #FF7851 #D8FF51

monochromatic

#003BD6 #1455FF #5181FF #8EADFF #CBDAFF

Accessibility & contrast

On white

3.54

#5181FF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.93

#5181FF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181FF

5.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181FF	#FFFFFF	#000000	##000000
##5181FF	1.00	3.54	5.93	5.93
#FFFFFF	3.54	1.00	21.00	21.00
#000000	5.93	21.00	1.00	1.00
##000000	5.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3791FF

Deuteranopia (green-blind)

#0081FC

Tritanopia (blue-blind)

#009FB4

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #5181ff;
/* rgb */ color: rgb(81, 129, 255);
/* oklch */ color: oklch(63.6% 0.195 265.5);

Tailwind

colors: {
  custom: {
    50: '#94a5ff',
    500: '#5181ff',
    950: '#000000',
  },
}

SCSS

$custom: #5181ff;
$custom-light: #94a5ff;
$custom-dark: #000000;

JSON

{
  "hex": "#5181ff",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 255
  },
  "hsl": {
    "h": 223.448,
    "s": 100,
    "l": 65.882
  },
  "oklch": {
    "l": 0.63572,
    "c": 0.19451,
    "h": 265.5
  },
  "luminance": 0.2467
}

Semantic roles & 50–950 ramp

primary

#5181FF

secondary

#F3E3B9

accent

#A600E6

background

#F9FAFF

surface

#F2F4FF

border

#CCCED7

text

#0F0F18

muted

#7E7F86

Preview Lab

Preview with #5181FF

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

Preview Lab → · Contrast checker → · Palette generator →