Cost of a pixel color
summary
Explains why displays matter: LCD needs a backlight so brightness drives power, while OLED true black turns pixels off and emits light per channel, so white is worst and blue costs about 25% more than red/green. Shows measured wins: a full-screen dark image cuts Pixel power by 63% power drop, YouTube dark theme saves ~43% (60% paused), Gboard ~20%, Maps ~31% at max brightness. Gives implementation fixes: use AppCompat DayNight, values-night/drawable-night, getTheme.applyStyle/Activity.setTheme and test via ADB.
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