Tables on the left have no bordercolor attribute. Right side is the same but with bordercolor.
border="1" frame="hsides" rules="none"cell2

border="8" frame="hsides" rules="none"cell2

border="8" frame="hsides"cell2

border="8" rules="none"cell2
border="1" frame="hsides" rules="none"cell2

border="8" frame="hsides" rules="none"cell2

border="8" frame="hsides"cell2

border="8" rules="none"cell2
Without "frame"/"rules" attribute.
border="1"cell2

border="8"cell2
border="1"cell2

border="8" cell2
border-collapse
border="1"cell2

border="8"cell2
border="1"cell2

border="8" cell2
bordercolor attribute on other elements
TBODY bordercolorcell2

TR bordercolorcell2
TD bordercolorcell2