def adjust_brightness(color, brightness):
    """Adjust brightness of an RGB color."""
    r, g, b = color
    return (int(r * brightness/255), int(g * brightness/255), int(b * brightness/255))

def rgb_to_hex(color):
    """Convert an RGB color to hex format."""
    return '#{:02x}{:02x}{:02x}'.format(color[0], color[1], color[2])


def generate_color_transition(start_color, end_color, steps):
    """Generate a list of colors transitioning from start_color to end_color."""
    r1, g1, b1 = start_color
    r2, g2, b2 = end_color

    transition_colors = []
    for i in range(steps):
        r = r1 + (r2 - r1) * i // (steps - 1)
        g = g1 + (g2 - g1) * i // (steps - 1)
        b = b1 + (b2 - b1) * i // (steps - 1)
        transition_colors.append((r, g, b))
    
    return transition_colors