#5181D3#5181D3

#5181D3 is a mid, vivid blue. Relative luminance 0.222; OKLCH L 60.8% C 0.136 H 260.5°. Best body text is #000000 at 5.43:1 contrast (WCAG AA passes).

Color values

HEX	#5181D3
RGB	rgb(81, 129, 211)
HSL	hsl(218, 60%, 57%)
HSV	hsv(218, 62%, 83%)
CMYK	cmyk(61.6%, 38.9%, 0%, 17.3%)
CIE-LAB	lab(54.19, 9.04, -47.11)
CIE-LCH	lch(54.19, 47.97, 280.86°)
OKLab	oklab(60.78% -0.0225 -0.1339)
OKLCH	oklch(60.78% 0.136 260.5)
XYZ	xyz(22.9973, 22.1509, 64.6790)
Luminance	0.2215 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181D3 #D3A351

analogous

#51C2D3 #5181D3 #6251D3

triadic

#5181D3 #D35181 #81D351

tetradic

#5181D3 #D351C2 #D3A351 #51D362

square

#5181D3 #D351C2 #D3A351 #51D362

split-complementary

#5181D3 #D36251 #C2D351

monochromatic

#224887 #2F61B8 #5181D3 #82A4DF #B3C8EC

Accessibility & contrast

On white

3.87

#5181D3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.43

#5181D3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181D3

5.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181D3	#FFFFFF	#000000	##000000
##5181D3	1.00	3.87	5.43	5.43
#FFFFFF	3.87	1.00	21.00	21.00
#000000	5.43	21.00	1.00	1.00
##000000	5.43	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D88D6

Deuteranopia (green-blind)

#4B7CD1

Tritanopia (blue-blind)

#0094A0

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #5181d3;
/* rgb */ color: rgb(81, 129, 211);
/* oklch */ color: oklch(60.8% 0.136 260.5);

Tailwind

colors: {
  custom: {
    50: '#8da5e1',
    500: '#5181d3',
    950: '#000000',
  },
}

SCSS

$custom: #5181d3;
$custom-light: #8da5e1;
$custom-dark: #000000;

JSON

{
  "hex": "#5181d3",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 211
  },
  "hsl": {
    "h": 217.846,
    "s": 59.633,
    "l": 57.255
  },
  "oklch": {
    "l": 0.60777,
    "c": 0.13575,
    "h": 260.5
  },
  "luminance": 0.22153
}

Semantic roles & 50–950 ramp

primary

#5181D3

secondary

#DAC7A6

accent

#A945E3

background

#F9FAFD

surface

#F1F4FB

border

#CBCED4

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #5181D3

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

Preview Lab → · Contrast checker → · Palette generator →