Some of symbols or characters are not be able to show in web page directly. You have to use a special set of codes (escape characters) to show correctly in web page. Html special characters are listed in below table for reference. Please note that not all characters are supported by every browser. Some browsers may support the numeric reference without supporting the character entity reference.
The following characters are reserved and cannot be used as identifiers in your programs. They have already been used by the Java language itself.
Like other languages, PHP also have special keywords/reserved words, that have special meaning. The following words cannot be used as constants, class names, function or method names. Generally, It can be used as variable names, but could lead to confusion and should not be used.
The following keywords are reserved. They cannot be used as variables, functions, methods, or object identifiers. You can bypass this restriction by enclosing the name in brackets [ ] but not recommended.
Many Programming languages have predefined keywords that have special meanings to the compiler. They cannot be used as variables, functions, methods, or object identifiers. The following words are reserved for C# language itself.
There are 216 web safe colors. It can be shown correctly even when running in 256 color mode.
Pastel is the kind of soft color. Here is soft pastel colour chart for your reference.
The following is a list of named color codes sorted by its name. Corresponding Hex codes and RGB codes are described.