An exclamation of horror broke from the painter’s lips as he saw in the dim light the hideous face on the canvas grinning at him. There was something in its expression that filled him with disgust and loathing…he felt as if his blood had changed in a moment from fire to sluggish ice.

– Oscar Wilde

The Picture of Dorian Gray, Chapter 13. When Dorian flings the cover off the portrait hidden in the attic, Basil lets out a cry of horror at the sight of the hideous face of Dorian on the canvass. The painting has changed, reflecting Dorian’s corrupted soul. Basil’s imminent murder at the hands of a morally destitute Dorian – as reflected by the portrait – is also foreshadowed when Basil’s blood changes "from fire to sluggish ice."