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Comment by madars | Hacker News Reader

Thanks! If you have a calculations workflow already, what would the contrast ratios (even if approximate) be for old iOS? To a human eye it truly looks like SMS got way worse whereas iMessage stayed around the same.

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The pre-iOS 7 graphics have black text over a non-uniform background color as compared to white text over a uniform background color. This gives us ranges instead of a single value, but even in the worst case, black is a vastly more legible foreground color:

           | iOS 5-6     | iOS 7+ |
  ---------+-------------+--------+
  SMS      | 11.3 - 13.4 | 2.2    |
  iMessage | 11.8 - 14.1 | 3.8    |

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