What is what flag is blue yellow and red?

There are many flags in the world that are blue, yellow, and red. Here are some examples:

1. Flag of Romania - This flag features three vertical stripes of blue, yellow, and red.

2. Flag of Ecuador - This flag has three horizontal stripes of yellow, blue, and red. The yellow stripe is wider than the other two.

3. Flag of Lithuania - This flag also has three horizontal stripes in yellow, blue, and red. However, the yellow stripe is at the top.

4. Flag of Venezuela - This flag features a yellow horizontal stripe in the middle, with a blue stripe above and below it. There are also red stripes on the top and bottom edges.

5. Flag of Colombia - This flag has three horizontal stripes of yellow, blue, and red. The yellow stripe is wider than the other two, and there is a large blue rectangle in the upper left corner.

Overall, the colors used in flags can represent many different things, such as historical events, cultural significance, or values.