#5181D9#5181D9

#5181D9 is a mid, vivid blue. Relative luminance 0.225; OKLCH L 61.1% C 0.144 H 261.5°. Best body text is #000000 at 5.49:1 contrast (WCAG AA passes).

Color values

HEX	#5181D9
RGB	rgb(81, 129, 217)
HSL	hsl(219, 64%, 58%)
HSV	hsv(219, 63%, 85%)
CMYK	cmyk(62.7%, 40.6%, 0%, 14.9%)
CIE-LAB	lab(54.51, 11.07, -49.98)
CIE-LCH	lch(54.51, 51.20, 282.49°)
OKLab	oklab(61.13% -0.0212 -0.1423)
OKLCH	oklch(61.13% 0.144 261.5)
XYZ	xyz(23.7636, 22.4574, 68.7146)
Luminance	0.2246 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181D9 #D9A951

analogous

#51C5D9 #5181D9 #6551D9

triadic

#5181D9 #D95181 #81D951

tetradic

#5181D9 #D951C5 #D9A951 #51D965

square

#5181D9 #D951C5 #D9A951 #51D965

split-complementary

#5181D9 #D96551 #C5D951

monochromatic

#1F4790 #2A60C2 #5181D9 #83A5E4 #B5CAEF

Accessibility & contrast

On white

3.82

#5181D9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.49

#5181D9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181D9

5.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181D9	#FFFFFF	#000000	##000000
##5181D9	1.00	3.82	5.49	5.49
#FFFFFF	3.82	1.00	21.00	21.00
#000000	5.49	21.00	1.00	1.00
##000000	5.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A89DC

Deuteranopia (green-blind)

#467DD7

Tritanopia (blue-blind)

#0095A2

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #5181d9;
/* rgb */ color: rgb(81, 129, 217);
/* oklch */ color: oklch(61.1% 0.144 261.5);

Tailwind

colors: {
  custom: {
    50: '#8ea5e5',
    500: '#5181d9',
    950: '#000000',
  },
}

SCSS

$custom: #5181d9;
$custom-light: #8ea5e5;
$custom-dark: #000000;

JSON

{
  "hex": "#5181d9",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 217
  },
  "hsl": {
    "h": 218.824,
    "s": 64.151,
    "l": 58.431
  },
  "oklch": {
    "l": 0.61132,
    "c": 0.14386,
    "h": 261.5
  },
  "luminance": 0.2246
}

Semantic roles & 50–950 ramp

primary

#5181D9

secondary

#DECBA8

accent

#AC41E7

background

#F9FAFE

surface

#F2F4FC

border

#CCCED5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #5181D9

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

Preview Lab → · Contrast checker → · Palette generator →