Watch-face Clock bubble color customization
Starting v4.40 a 3rd option becomes available for the clock bubble: 
►Analog clock: uploading images
►Digital clock: changing colors
►New: Analog clock: changing colors

You can now adjust the look of the analog clock bubble without the need of uploading dials, hour and minute hands.

Notes:
1) you can change the color of non-customized clock component images

2) v4.40 also brings improvements in the way uploaded clock image components are handled. It became much more flexible: no need to size the pieces separately.