#5181CA#5181CA

#5181CA is a mid, vivid blue. Relative luminance 0.217; OKLCH L 60.3% C 0.124 H 258.5°. Best body text is #000000 at 5.34:1 contrast (WCAG AA passes).

Color values

HEX	#5181CA
RGB	rgb(81, 129, 202)
HSL	hsl(216, 53%, 55%)
HSV	hsv(216, 60%, 79%)
CMYK	cmyk(59.9%, 36.1%, 0%, 20.8%)
CIE-LAB	lab(53.72, 6.01, -42.76)
CIE-LCH	lch(53.72, 43.18, 278.01°)
OKLab	oklab(60.26% -0.0246 -0.1211)
OKLCH	oklch(60.26% 0.124 258.5)
XYZ	xyz(21.9005, 21.7122, 58.9024)
Luminance	0.2171 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5181CA #CA9A51

analogous

#51BECA #5181CA #5D51CA

triadic

#5181CA #CA5181 #81CA51

tetradic

#5181CA #CA51BE #CA9A51 #51CA5D

square

#5181CA #CA51BE #CA9A51 #51CA5D

split-complementary

#5181CA #CA5D51 #BECA51

monochromatic

#25477B #3463AA #5181CA #80A3D8 #AFC5E7

Accessibility & contrast

On white

3.93

#5181CA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.34

#5181CA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5181CA

5.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5181CA	#FFFFFF	#000000	##000000
##5181CA	1.00	3.93	5.34	5.34
#FFFFFF	3.93	1.00	21.00	21.00
#000000	5.34	21.00	1.00	1.00
##000000	5.34	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6287CD

Deuteranopia (green-blind)

#527BC8

Tritanopia (blue-blind)

#00919C

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #5181ca;
/* rgb */ color: rgb(81, 129, 202);
/* oklch */ color: oklch(60.3% 0.124 258.5);

Tailwind

colors: {
  custom: {
    50: '#8ca5da',
    500: '#5181ca',
    950: '#000000',
  },
}

SCSS

$custom: #5181ca;
$custom-light: #8ca5da;
$custom-dark: #000000;

JSON

{
  "hex": "#5181ca",
  "rgb": {
    "r": 81,
    "g": 129,
    "b": 202
  },
  "hsl": {
    "h": 216.198,
    "s": 53.304,
    "l": 55.49
  },
  "oklch": {
    "l": 0.60263,
    "c": 0.12361,
    "h": 258.5
  },
  "luminance": 0.21714
}

Semantic roles & 50–950 ramp

primary

#5181CA

secondary

#D5C1A2

accent

#A34BDD

background

#F9FAFD

surface

#F1F4FB

border

#CBCED4

text

#0D0F15

muted

#7E7F83

Preview Lab

Preview with #5181CA

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

Preview Lab → · Contrast checker → · Palette generator →