tldr: I built a tiny app that turns your birth-date into a color.

How it works:

You enter a date, the app converts it into a 6‑digit hex code, and it renders your “birthday color” as a swatch. It’s simple, playful, and deterministic (fancy way of saying that the same date always gives the same color.)

Why it’s cool:

It takes something personal (a birthday) and maps it into the 24‑bit RGB color space. That space has ~16.7M colors, so everyone gets a unique-ish result.

What I learned:

I’ve used hex values for years without fully understanding the logic and maths behind it - so I spent some time indulging my interests by building this app! Also - I learnt how RGB values map to hex (#RRGGBB), and how 8 bits per channel gives you 256 levels × 3 channels = 16.7M colors.

Also, it took no more than a few mins, but I enjoyed figuring out how to safely fit large numbers into a 6‑digit hex range using modulo. This was a new one for me, if very basic.

New tech I explored:

This was my first quick project with Streamlit. I loved how fast it was to go from idea → UI → a working app without any frontend setup. I’ve since used Streamlit extensively when I need to showcase some Python i’ve built without a charting library.

Next up/Wishlist:

A color name lookup library for all possible hex values (16.7M hex colors), and tests for the date-to-hex conversion. I could have used the basic CSS colour library, but it wouldn’t have 16.7 million values, and I care deeply about insignificant but cute details like this, so left the colour name blank and will amend when I have more time in the future!