The Color That Isn't There

The spider was the size of a grain of rice, and it was the wrong color for being that small.

Maya had it cornered on the white porch railing, sun hammering down, and every time it turned its little face toward them it flashed a blue so hard and bright it hurt to look at. Then it turned away and went the color of dust. Blue. Dust. Blue. Dust. Like a tiny lighthouse the size of a sesame seed.

"It's doing it again," Maya said. She had her phone an inch from the railing. "Get the camera ready. When it faces us."

Soren had the magnifying glass, the big one from his grandfather's tackle box, warm from his hand. He bent close. The spider had little flaps, two of them, that it lifted up behind its head like a fan opening.

"It's only blue from the front," he said. "Watch. When it lifts the fan toward us. Otherwise nothing."

Maya tilted her phone left, then right. The blue swam. It slid toward green at one angle and went almost violet at another, and at the wrong angle it switched off completely, like a light pulled by a string.

"That's not how blue works," she said.

Soren waited for her, because she had that thing in her voice.

"Paint doesn't do that," Maya said. "My blue shirt is blue from every side. In the shade, in the sun. It doesn't turn off." She moved the phone again. Green. Violet. Off. "This blue moves when I move."

The spider hopped two inches sideways and froze. Soren followed it with the glass.

"So it's not paint," he said slowly. "It's not a color the spider has. It's a color the light is doing."

"Doing where?"

"On the spider. Somehow." He pulled the glass back, then close again, hunting for the focus. Under the lens the fan wasn't smooth. It was furred all over with rows of tiny flat scales, packed tight, lined up like shingles on a roof. Too small to be any single color. Just texture catching sun.

"Soren. The dust."

"What dust."

"When a butterfly wing rubs off on your fingers. That powder. That's scales, right? My science book said butterfly wings are covered in scales." Maya was already up off the railing. "The shiny blue butterflies. The morphos. They're that same hard blue. The kind that hurts."

Soren felt something line up in his chest, two facts clicking edge to edge.

"The opal," he said. "My mom's ring. It's milky white but when she moves her hand there's fire in it. Green, then orange, then nothing. It moves when she moves." He looked at the spider, then at Maya. "Same as this. The color comes and goes depending on where you stand."

"So the spider, the butterfly, and a rock are all doing the same trick."

"And the trick isn't a color," Soren said. "It's a shape."

Maya went quiet "Test it," she said. "You said it's a shape. Shapes can break. If it's paint, breaking it won't change the color. If it's a shape, breaking it kills the color."

They looked at each other. Neither of them was going to crush the spider. That was off the table without a word passing.

"The butterfly powder," Soren said. "Last summer. The dead morpho by the garage, the one you put in a jar."

Maya was already through the screen door. The jar lived on the windowsill in her room, a glassed-in scrap of blue that still stopped people in the hallway. She came back at a run with the morpho wing balanced on her palm, blazing electric in the porch light.

Soren wet the tip of one finger. "You sure."

"It's already dead. We're not hurting anything. We're asking it a question."

He pressed his finger flat on the wing and rubbed, gently, the way you'd smudge a pencil line. A little blue dust came up on his skin.

The spot he had rubbed was not blue anymore. It was brown. Plain, dull, dead-leaf brown. The blue was gone from that patch entirely, like he had wiped it off.

"Look," he whispered.

Maya bent over his hand. The dust on his fingertip, the powder he had rubbed loose, was not blue either. It was nothing. Gray-brown smudge.

"It's brown underneath," she breathed. "The whole time. The butterfly is brown."

"The blue isn't in the scale," Soren said. "The blue is in how the scale is built. The bumps, the rows, whatever's on it. Light bounces around in there and comes back blue. Crush the bumps" he turned his finger over "and there's no blue. There was never any blue. There was a shape that made blue out of plain light."

Maya sat down hard on the porch step. The spider was still up on the railing, lifting its little fan, switching its tiny lighthouse on and off at the sun, not knowing it had no color at all.

"Then nothing's the color we think it is," she said. "Not really. The opal's not really on fire. The butterfly's brown." She turned her own hand over and stared at her skin in the light. "How much of what I'm looking at is just shapes the right size?"

Soren didn't answer. There wasn't an answer, and she didn't want one. He looked at the brown smudge on his finger and then up at the spider, which was sesame-sized and the bluest thing on the whole street, blue with nothing, blue out of structure and sunlight and the angle of one boy's eye.

"It's smaller than the light," he said finally. "The bumps. They have to be. Smaller than the actual size of the blue. That's why we can't see them, we can only see what they do."

Maya looked at him.

"There are things on that spider smaller than a color," she said.

The spider lifted its fan one more time. From where Soren knelt it was pure cold blue. He shifted his weight three inches to the left, slow, watching.

The blue went out like a candle, and a speck of brown dust sat on the railing in the sun.