He's gone.
His boy is lost forever.
Tony could feel warm liquid running down his dirt coated cheek. After all that they had gone through, after everything Jarvis and himself had done to stop them, Tony knew that there was no chance of returning his Jarvis home.
They had destroyed everything- everyone- Tony loved. Pepper, Rhodey, his cars for Christ sake! And now Jarvis! His world is empty, nothing to fill the void that was once occupied by a friend he created by hand.
They shred apart his universe bit by bit, into millions of unrepairable pieces when they took Jarvis. If the Gods were watching, they'd be ashamed to say that Tony Stark was no longer there. He left with Jarvis. His physical form remains, but any trace of the Genius Billionaire Playboy Philanthropist is gone, gone with the rest of what made Anthony Edward Stark.
And now, true to their plan, they vowed to burn Stark, and he himself would ensure that. Taking the gun by hand, pressing the tip to his temple. Eyes closed, blocking the surrounding world, Tony went over every memory he could of his beautiful boy. From the time he first thought of the obscure idea of an AI butler, to the most recent times of despair. He remembered how tightly he grasped onto the last remaining bits of love he had, love for his companion and vice versa, before they corrupted his very being. Blood red is what represents Jarvis now, no longer the blue of night, but the crimson of battle.
No more Jarvis.
No more Tony Stark.
Trigger fired, ceased the era of the Iron Man.