A horizontal tricolour of red, white, and blue (top to bottom).
Why the flag transitioned from an orange band to a red band is unknown. It may be attributed to a new technique for creating an orange dye that had a deeper red appearance, or due to orange's tendency to quickly fade in sunlight. Whatever the reason, red, white, and blue flags appeared as early as 1596 but were most common following 1630.
Prior to 1664 this flag was known as Hollandsche Vlag (Flag of Holland). Zeeland, one of the other provinces involved in the revolt against Spain complained about the name of the flag referencing only the province of Holland. What followed was a resolution from the States-General identifying the flag as Statenvlag (States Flag)