Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
Also your gradient is not correct. Gradient colors are not separated by colons. They are separated by a hyphen and if you are using hex or rgb colors, then the whole value must be enclosed in double quotes.