What is the name of the cheese that crumbles and melts in your mouth?!

What is the name of the cheese that crumbles and melts in your mouth?

It is sometimes served on a cheese platter alongside matured chedder and other cheeses It looks like matured chedder but crumbles a little when you cut it, has a sharpish taste and seems to melt in your mouth.

Please tell me if this is classed as a hard cheese as I am on a diet and can't eat soft cheeses such as camembert & brie.

1 day ago
No it isnt fetta or blue vein - I know both of those...

If the color is similar to the cheddar, it might be a Colby-jack which is also orangish-yellow and kind of crumbly. The melt in your mouth part is probably relevant to the person eating it in this case. If "looks like matured cheddar" doesn't mean orangish-yellow, you could be talking about Bleu Cheese which quite possibly could be classified as a soft cheese. Also, there is an aged, extra sharp cheddar which may be served along side a milder cheddar on a platter (if this is not what you mean by matured cheddar) and would look like other Cheddars. It also tends to crumble when you cut it due to having a lower moisture content from aging and is understandably sharp tasting. Aged, extra sharp Cheddar would of course be a hard cheese.
Good luck on your diet.