Invalid Property Value

What causes this error

The property value does not match any accepted format for the CSS property. This can be a misspelled keyword, missing unit, wrong function syntax, or a value that is not supported by the property.

How to fix it

Check the MDN documentation for valid values. Add units to numeric values (px, em, rem). Use correct keyword values. Validate color, gradient, and function syntax.

div { color: notacolor; }