HTC M4 has been in news from a long time. The device details were first leaked in February. Later on, last month PhoneArena showed up one press render image of HTC M4. The device looked exactly like HTC's this year flagship device, HTC One. According to the reports, HTC M4 will be named as HTC One Mini.
According to Forte (Estonian Site), who leaked these images, HTC One mini will go on sale in August and will see an official announcement in late July. The rumoured specs of HTC One Mini are, 4.3-inch HD display with 720p resolution, Dual-Core Qualcomm Snapdragon 400 Processor, 2GB RAM, 16GB internal storage, 1700mAh Battery & Android 4.2.2 Jelly Bean.
As per leaked images, HTC has included their HTC Sense 5.0 on the device, so it is sure that, HTC One Mini will come with HTC Sense 5.0, HTC Boomsound, HTC Ultrapixel Camera and HTC Zoe.
Coming to the HTC One Blue colour model, Pocket-lint is reporting that HTC might be announcing the Blue Colour HTC One in coming weeks. The device will join the already leaked Red Colour HTC One with Silver & Black Colour HTC One. You can view the small look of Blue HTC One below with leaked Red HTC One. (The Blue HTC One Image below is just a mock up and not the actual device.)