Enter an RGB colour and click [Show].
rgb(232,0,64), rgba(232,0,64,1), or #E80040.
Tip: choose a colour first, then click a button to apply it to a panel.
This RGB Colour Tester is simple. Type or pick a colour, press Show, and you'll see it fill a large panel so you can judge it at a glance. Handy for checking contrast against different backgrounds, comparing two shades side by side, and seeing how a colour feels at full brightness in a dim or bright room.
You can use the built-in picker or type values directly (RGB or HEX) and the tool will display the exact colour along with the RGB/HEX readout. The two panels (Top and Bottom) let you compare variations with is useful for things like primary vs hover, light theme vs dark theme, or a proposed brand shade against an existing one. Full-screen mode is there when you want to step back from the desk and view the colour as a bigger block, which can make banding or an unwanted tint more obvious.
Another feature is the shareable URL: you can copy the address and send it to someone else so they see the same colour straight away. That's great for quick feedback without screenshots. It's not meant to replace a full design tool; it's just a fast, no-frills way to preview colours on the screens that actually matter, yours and your team's. If you spot anything that could make it more useful, feel free to leave a comment below.
rgb(232, 0, 64) or #E80040).None