Change "Color" BB-Code modal window

Go to "New Answer" screen, add any text, select it, click on "Color" BB-Code button.
As a result, an additional window is shown.

The following objects to improving are found:

• Move the closing "X" button to the right upper corner of the window.
• Change the type of the field with the color sample so that it wouldn't be possible to put the cursor to this field.(see attachment)
• It should be possible to enter the valid color code to the color code field (left upper field - see atachment).
  Actual behaviour is incorrect.
  Steps to reproduce:
  1. Enter valid color code to the color code field (f.ex. #FF9900)
  2. Press Enter
  AR: The message is posted without having clicked "Answer" button, the text posted is plain and has no color.
  ER: The text entered is inserted between correct "Color tags" (f.ex.[color=FF9900]any text[/color]), the post with a text of a correct color is to be posted after clicking "Answer" button.