Washington, DC (CNN Business) If you want your Tesla in black, it'll cost you extra starting next month.

Tesla TSLA Black, which has long been the colorbuyers could purchase without an added charge, will now cost an extra $1,000, according to a tweet from Tesla CEO Elon Musk. The $1,000 charge brings black in line with the costs for silver and blue paint.

Musk did not explain the reason for the price hike, and Tesla did not immediately respond to a request for comment.

The future price increase may encourage sales in the final days of Tesla's second financial quarter. The third quarter begins in July, the same time Tesla raises the price of black paint. Musk also tweeted Wednesday a reminder that the US federal tax credit for Teslas shrinks next month.

Tesla's price hike shouldn't actually increase the minimum price for an Model 3, S or X. Musk tweeted that there will be a simple white color offered at no extra charge. (Tesla already offers a pearl multi-coat shade of white for $1,500 extra.)