# Is there a simple way to “brighten” or “darken” a color?

For example, I have color `#009b55` (ForestGreen), and I want to get a slightly brighter version of it - `#00a85c`. Is there a function that can do it for me?

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@JohnWickerson - but can I use "ForestGreen!20!black" ? – Rogach May 19 '13 at 9:28
@JohnWickerson - yes, it seems I can. Thanks! If you'll post that as an answer, I'll accept it. – Rogach May 19 '13 at 9:29
An aside: "dimmen" isn't actually an English word. You probably wanted "darken" `;)`. – John Wickerson May 19 '13 at 10:05
If you got the HTML color value already it’s also possible to use `\color[HTML]{00a85c}` or `\definecolor{MyGreen}{HTML}{00a85c}` to define a new color named `MyGreen` – Tobi May 19 '13 at 10:09
@JohnWickerson - I edited it to darken now. – Rogach May 19 '13 at 13:15

If you put

``````\usepackage[usenames,dvipsnames]{xcolor}
``````

in your preamble, you can write things like

``````ForestGreen!60!black
``````

to get a colour that is 60% ForestGreen and 40% black. ("Forest Green" is made available through the `dvipsnames`(reference) option.)

See (TikZ or xcolor) lighten color for a more thorough explanation.

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You can also do this with a reference to the current colour, for example \color{blue} Blue \color{.!80!black} Darker – Andrew Kepert May 19 '13 at 10:30