Yellow.

"What's he writing?" Meredith asked, her eyebrows furrowed watching their John Doe, draw on Eleanor's hand.

"An I. A heart. And a you." Eleanor spoke confused as she shook her head. "He must be in shock still? Or confused?"

The man continued drawing on her hand, as her eyebrows furrowed. "An O, another O, and a 7?"

"I-I don't know what this means." She whispered to the man as Meredith gasped, covering her mouth.

Eleanor looked to Meredith, confused, and eyes wide. "What! What?"

"Double O,7!"