Adding a new feature to add color value via typing. Unnecessary whitespace removed.

[matysanchez]

Now the user can choose the color with the color picker or typing it.

[LeaVerou]

Hi there,
Thanks for the PR (how did you discover this project?!) but the code could use some work. For example:

• onchange is a bad event to use for text inputs, as it fires after the user tabs away from the input. oninput is a better one.
• If the color control is not supported, you get two textboxes
• It uses inline HTML event handlers which are a bad practice
• maxlength="7" is a bad idea for colors, as there are longer notations that should be supported (e.g. rgb() or hsl())
• You're using a string as a flag and who is not a descriptive variable name

[matysanchez]

I will work on the points you mentioned and I will add a commit to this PR.