microsoft / microsoft/calculator
Add support for custom color and photo themes
Nobody has claimed this yet.
- Dominant language
- C#
- Stars
- 31.1k
- Forks
- 5.8k
- PR merge metrics
- No merged PRs in 30d
Description
Problem Statement
Calculator is great example of Fluent design, but it doesn't feel like my Calculator.

Evidence or User Insights
- Adding more color options is a top requested feature on Feedback Hub
- Other products, like SwiftKey and the new Windows Terminal, support themes, which are quite popular with users.
Proposal
Add support for custom color and photo themes in Calculator.
Goals
- Users can select a custom color theme.
- Users can select an image as their theme.
Non-Goals
- Fine-grained personalization of individual UI elements
Low-Fidelity Concept

Requested Assignment
I'm just suggesting this idea. I don't want to implement it.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
The issue names no files, tests, or entry points. Begin by reviewing the proposal and Calculator's existing theme UI, then determine how custom colors and image themes should be selected and rendered; done means both goals work without fine-grained personalization of individual UI elements.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- csharp
- Domain
- design, frontend
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100