He put in a touch of burnt umber and again considered the effect.
"Confound it! that's all wrong," he muttered.
"It's blue," said Paul.
The artist started, twisted his head, and for the first time became conscious of the ragamuffin's presence.

"Oh, you see it blue, do you ?" He smiled ironically.
"Ay," said Paul, with pointing finger.

"Look at it.

It's not brown, anyhow.

Yon's black inside and blue outside." The young man shaded his brow and gazed intently.