Trying to export a document which contains hyperlink pasted from Outlook throws KeyNotFoundException. The color of the span is not registered.
Workaround:
Telerik.WinForms.Documents.Model.Styles.StyleDefinition style = new Telerik.WinForms.Documents.Model.Styles.StyleDefinition("test", Telerik.WinForms.Documents.Model.Styles.StyleType.Character);
style.SpanProperties.ForeColor = Color.FromArgb(5,99,193);
this.radRichTextEditor1.Document.StyleRepository.Add(style);