#5181D4#5181D4

#5181D4 is a mid, vivid blue. Relative luminance 0.222; OKLCH L 60.8% C 0.137 H 260.7°. Best body text is #000000 at 5.44:1 contrast (WCAG AA passes).

Color values

HEX	#5181D4
RGB	rgb(81, 129, 212)
HSL	hsl(218, 60%, 57%)
HSV	hsv(218, 62%, 83%)
CMYK	cmyk(61.8%, 39.2%, 0%, 16.9%)
CIE-LAB	lab(54.24, 9.37, -47.59)
CIE-LCH	lch(54.24, 48.51, 281.14°)
OKLab	oklab(60.84% -0.0222 -0.1353)
OKLCH	oklch(60.84% 0.137 260.7)
XYZ	xyz(23.1231, 22.2012, 65.3413)
Luminance	0.2220 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181D4 #D4A451

analogous

#51C3D4 #5181D4 #6251D4

triadic

#5181D4 #D45181 #81D451

tetradic

#5181D4 #D451C3 #D4A451 #51D462

square

#5181D4 #D451C3 #D4A451 #51D462

split-complementary

#5181D4 #D46251 #C3D451

monochromatic

#224889 #2E61BA #5181D4 #82A5E0 #B3C8EC

Accessibility & contrast

On white

3.86

#5181D4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.44

#5181D4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181D4

5.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181D4	#FFFFFF	#000000	##000000
##5181D4	1.00	3.86	5.44	5.44
#FFFFFF	3.86	1.00	21.00	21.00
#000000	5.44	21.00	1.00	1.00
##000000	5.44	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D88D7

Deuteranopia (green-blind)

#4A7CD2

Tritanopia (blue-blind)

#0094A0

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #5181d4;
/* rgb */ color: rgb(81, 129, 212);
/* oklch */ color: oklch(60.8% 0.137 260.7);

Tailwind

colors: {
  custom: {
    50: '#8da5e1',
    500: '#5181d4',
    950: '#000000',
  },
}

SCSS

$custom: #5181d4;
$custom-light: #8da5e1;
$custom-dark: #000000;

JSON

{
  "hex": "#5181d4",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 212
  },
  "hsl": {
    "h": 218.015,
    "s": 60.369,
    "l": 57.451
  },
  "oklch": {
    "l": 0.60836,
    "c": 0.13711,
    "h": 260.7
  },
  "luminance": 0.22203
}

Semantic roles & 50–950 ramp

primary

#5181D4

secondary

#DBC7A6

accent

#A944E4

background

#F9FAFD

surface

#F1F4FB

border

#CBCED4

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #5181D4

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

Preview Lab → · Contrast checker → · Palette generator →