The calculator application on the iPhone has always had the same orange color scheme, but with a new free jailbreak tweak called ColorCalculator, you can change the tone of the application to any color you want.
With a number of preset colors to choose from , tweak ColorCalculator is easy to use and can help you get any color you want to apply to your calculator.
After installation, you can go directly to settings → ColorCalculator and you will find the tweak preferences panel where you can begin to retouch the color configuration options.
By default, you can choose between red, orange, yellow, green, blue, indigo, purple, pink.
When you have finished making your selection, you will simply need to click on the blue button to apply the changes in the preferences panel. This does not require respring to your device and changes are immediate.
As you can see, tweak not only works in normal mode as it also works in landscape mode.
Unfortunately, because there is no interface color picker in the preferences panel as commonly often incorporate other tweaks, ColorCalculator limited to colors default is to change the tone of the calculator.
For most people, this is not a problem, since most of the main colors are included in the tweak, but others could not get certain types of colors among those available if they are using this tweak in combination with some type Of theme, which may not fit well with other things in terms of aesthetics.
If you are interested in trying ColorCalculator, you can download it for free on your iPhone jailbroken from the BigBoss Cydia repository.