It was reported by Phandroid that all or some of HTC Legend and Desire Android smartphones have poor grayscale reproduction.

Now you can quick check your HTC device does it have this grayscale issue or not using small tool from Android Market – Screen Test.
Originally application was created to help in dead pixels finding. Current release has some extra useful screens to test your device and now includes grayscale gradient to be sure that your HTC Legend or Desire phone is fine.

You can download application from Android Market by searching “Screen Test” or just scan QR-code below.

ScreenTest QR Code

And don’t forget to comment on this or original Phandroid post to clarify is this is the issue for all HTC Legend phones or not.