Changing HTML5 Canvas text span color

Is there a way to change the color of a span of text without having to start a new fillText?

The downside to starting a new fillText is that presumably I'l开发者_如何学JAVAl have to somehow calculate the position where the first ended to try to join the next bit of text.

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I'm afraid there is no way to change the color without starting a new fillText in the current spec.