#5181DA#5181DA

#5181DA is a mid, vivid blue. Relative luminance 0.225; OKLCH L 61.2% C 0.145 H 261.7°. Best body text is #000000 at 5.50:1 contrast (WCAG AA passes).

Color values

HEX	#5181DA
RGB	rgb(81, 129, 218)
HSL	hsl(219, 65%, 59%)
HSV	hsv(219, 63%, 85%)
CMYK	cmyk(62.8%, 40.8%, 0%, 14.5%)
CIE-LAB	lab(54.56, 11.41, -50.46)
CIE-LCH	lch(54.56, 51.73, 282.74°)
OKLab	oklab(61.19% -0.021 -0.1437)
OKLCH	oklch(61.19% 0.145 261.7)
XYZ	xyz(23.8940, 22.5096, 69.4017)
Luminance	0.2251 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181DA #DAAA51

analogous

#51C5DA #5181DA #6551DA

triadic

#5181DA #DA5181 #81DA51

tetradic

#5181DA #DA51C5 #DAAA51 #51DA65

square

#5181DA #DA51C5 #DAAA51 #51DA65

split-complementary

#5181DA #DA6551 #C5DA51

monochromatic

#1F4792 #2A60C4 #5181DA #83A6E5 #B6CAEF

Accessibility & contrast

On white

3.82

#5181DA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.50

#5181DA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181DA

5.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181DA	#FFFFFF	#000000	##000000
##5181DA	1.00	3.82	5.50	5.50
#FFFFFF	3.82	1.00	21.00	21.00
#000000	5.50	21.00	1.00	1.00
##000000	5.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5989DD

Deuteranopia (green-blind)

#457DD8

Tritanopia (blue-blind)

#0095A3

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #5181da;
/* rgb */ color: rgb(81, 129, 218);
/* oklch */ color: oklch(61.2% 0.145 261.7);

Tailwind

colors: {
  custom: {
    50: '#8ea5e6',
    500: '#5181da',
    950: '#000000',
  },
}

SCSS

$custom: #5181da;
$custom-light: #8ea5e6;
$custom-dark: #000000;

JSON

{
  "hex": "#5181da",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 218
  },
  "hsl": {
    "h": 218.978,
    "s": 64.929,
    "l": 58.627
  },
  "oklch": {
    "l": 0.61192,
    "c": 0.14521,
    "h": 261.7
  },
  "luminance": 0.22512
}

Semantic roles & 50–950 ramp

primary

#5181DA

secondary

#DECCA8

accent

#AD40E8

background

#F9FAFE

surface

#F2F4FC

border

#CCCED5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #5181DA

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

Preview Lab → · Contrast checker → · Palette generator →