Convert black pixels with red in a binary image using python opencv

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I have a binary image in black and white, I created using opencv I would like to convert black pixels on this image to red, how can I achieve this?

def convertImageToBinary():
    print('converting image to black and white')
    originalImage = cv2.imread('lena.png')
    grayImage = cv2.cvtColor(originalImage, cv2.COLOR_BGR2GRAY)

    (thresh, blackAndWhiteImage) = cv2.threshold(grayImage, 127, 255, cv2.THRESH_BINARY)


    cv2.imshow('Black white image', blackAndWhiteImage)
    cv2.imshow('Original image',originalImage)
    cv2.imshow('Gray image', grayImage)

    cv2.waitKey(0)
    cv2.destroyAllWindows()


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