New
Design
Colour Converter
Switch between HEX, RGB and HSL colour values.
New: File Converter
Convert files locally — including Word and Excel.
Images, whole PDFs, Word DOCX, Excel XLSX, text, code, CSV and JSON stay on your device. KitLumo never receives or stores a copy.
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Free Design tools
Colour Converter
Straightforward tools that work right here on your phone, tablet or computer. No account, no AI, no nonsense.
Your tool data stays on this device.
Anything you type, paste, calculate or open in a tool is not sent to us. KitLumo does not receive it or save a copy.
Free Design tools
How to use the Colour Converter
Switch between HEX, RGB and HSL colour values. Add the information requested by the tool and review the result before you copy, download or use it.
- Enter or choose the information requested by the tool.
- Check the result and change an input if you want to compare another scenario.
- Copy, download or use the result when it fits your task.
Using the result
Use the result as a design starting point, then check it in the real interface and at the actual screen sizes you support.
Your tool entries are handled in your browser and are not sent to or saved by KitLumo.
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Understand the result, not just the number.
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How KitLumo stays free
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Clearly labelled ads fund the website so everyone can use every tool for free. If KitLumo saves you time, you are also welcome to make an optional donation to help pay for hosting and keep the tools available.
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Free means free.
KitLumo is built around small, focused utilities. No login walls, no artificial limits and no AI layer where a reliable tool will do.
Every tool currently available works directly on the phone, tablet or computer you are using. Anything you type, paste, calculate or open in a tool is not sent to us, and KitLumo does not save a copy.
Your saved and recently used tool shortcuts are stored only in your browser on this device. When you use “Report a problem” or “Request a free tool,” only that message and any email address you choose to add are sent to KitLumo.