Here is a short story developed around that theme. The Monochrome File

He remembered last week. He had shot a young enemy runner—a boy no older than sixteen. After the boy fell, Arjun had checked his pulse. His own gloves had turned sticky and warm. The same warmth. The same shade of crimson that stained his mother’s kitchen floor when she cut her hand chopping vegetables.

Inside, the first line read: "This file contains no state secrets. Only a biological fact. Share it widely. Because ratham ore niram—and forgetting that is the deadliest weapon of all."

Arjun shouted across the water, his voice cracking: "Ratham ore niram!"

In a war-torn village, a soldier finds a mysterious PDF file on a destroyed laptop that reveals a truth his commanders never wanted him to see: the enemy bleeds the same color he does. The year is 2029. The civil war in the borderlands of Devapuri had lasted a decade. Corporal Arjun “Rusty” Rathore had lost count of the bodies he had buried, the villages he had torched, and the nights he had screamed into his helmet so no one could hear him cry.

Then the mortars began to fall again. But Arjun had already seen the truth. And you cannot unsee the color of your own humanity.

He tapped the touchpad.

His mission was simple: clear Sector 7. The enemy, the so-called "Northern Serpents," were dehumanized in training reels—shown as fanged, red-eyed monsters in propaganda. "They are not like us," his commander had barked. "Their blood is different."

But Arjun knew now: the PDF was a key. It unlocked a truth that generals buried under layers of flags and slogans.

But Arjun was curious. The screen glowed with a single open file:

For a long moment, no one fired. The river kept flowing. The blood of the dead, mixed together, flowed too—one color, one current, one silent scream for peace.