I don't believe so, however how you describe them could be, you may probably didn't say the correct color. Veins are blue and red. However, blue veins are not always really "blue" they can change I believe based on the amount of oxygen in your blood, in that vein.
You should have them checked by a doctor. Some varicose look bad but are harmless, some are just in comfortable. Some can cause serious blood clots. This is why a doctor should take a look. There are treatments for these that are often covered by insurance.