Looks cool but you may want to rethink the blue LED for an alarm clock, because blue light interferes with sleep.
https://www.health.harvard.edu/healthy-aging-and-longevity/b...
https://www.health.harvard.edu/healthy-aging-and-longevity/b...
You can also get a classic green or color display with negative display and use custom backlight colors (https://www.adafruit.com/product/399)