#5181D2#5181D2

#5181D2 is a mid, vivid blue. Relative luminance 0.221; OKLCH L 60.7% C 0.134 H 260.3°. Best body text is #000000 at 5.42:1 contrast (WCAG AA passes).

Color values

HEX	#5181D2
RGB	rgb(81, 129, 210)
HSL	hsl(218, 59%, 57%)
HSV	hsv(218, 61%, 82%)
CMYK	cmyk(61.4%, 38.6%, 0%, 17.6%)
CIE-LAB	lab(54.13, 8.70, -46.63)
CIE-LCH	lch(54.13, 47.44, 280.57°)
OKLab	oklab(60.72% -0.0227 -0.1325)
OKLCH	oklch(60.72% 0.134 260.3)
XYZ	xyz(22.8724, 22.1009, 64.0208)
Luminance	0.2210 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181D2 #D2A251

analogous

#51C2D2 #5181D2 #6151D2

triadic

#5181D2 #D25181 #81D251

tetradic

#5181D2 #D251C2 #D2A251 #51D261

square

#5181D2 #D251C2 #D2A251 #51D261

split-complementary

#5181D2 #D26151 #C2D251

monochromatic

#234886 #2F62B7 #5181D2 #82A4DF #B2C7EB

Accessibility & contrast

On white

3.87

#5181D2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.42

#5181D2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181D2

5.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181D2	#FFFFFF	#000000	##000000
##5181D2	1.00	3.87	5.42	5.42
#FFFFFF	3.87	1.00	21.00	21.00
#000000	5.42	21.00	1.00	1.00
##000000	5.42	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E88D5

Deuteranopia (green-blind)

#4C7CD0

Tritanopia (blue-blind)

#00939F

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #5181d2;
/* rgb */ color: rgb(81, 129, 210);
/* oklch */ color: oklch(60.7% 0.134 260.3);

Tailwind

colors: {
  custom: {
    50: '#8da5e0',
    500: '#5181d2',
    950: '#000000',
  },
}

SCSS

$custom: #5181d2;
$custom-light: #8da5e0;
$custom-dark: #000000;

JSON

{
  "hex": "#5181d2",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 210
  },
  "hsl": {
    "h": 217.674,
    "s": 58.904,
    "l": 57.059
  },
  "oklch": {
    "l": 0.60719,
    "c": 0.1344,
    "h": 260.3
  },
  "luminance": 0.22103
}

Semantic roles & 50–950 ramp

primary

#5181D2

secondary

#DAC6A5

accent

#A846E2

background

#F9FAFD

surface

#F1F4FB

border

#CBCED4

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #5181D2

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

Preview Lab → · Contrast checker → · Palette generator →