I'm wondering why, my line 1 works (and produce a cyan color) and line 2 doesn’t. the value (26, 120, 224) are RGB value that I've picked wit GIMP, so I think they're correct.

  1. \definecolor{beamer@blendedblue}{rgb}{0,255,255}
  2. \definecolor{beamer@blendedblue}{rgb}{26,160,224}
  • 2
    The correct syntax is \definecolor{beamer@blendedblue}{RGB}{26,160,224}, rgb in lowercase needs numbers between 0 and 1. If you use larger numbers, they are rounded down, so your second declaration is (1,1,1) and so white. Nov 1, 2018 at 10:08
  • oh didn't see your comment before posting my answer ;) @UlrikeFischer
    – kuropan
    Nov 1, 2018 at 10:25
  • so the differences is just in rgb and RGB :-(
    – RenatoP
    Nov 1, 2018 at 10:25

1 Answer 1


This is just a mistake in the error specification. Note that the model rgb means that your values should be between 0 and 1, whereas RGB means that your values should be between 0 and 255 (like you chose).



\definecolor{A}{RGB}{0, 255, 255}
\definecolor{B}{RGB}{26, 160, 224}


    \begin{frame}{My title}
            \item {\color{a}this is colored a}
            \item {\color{b}this is colored b}
            \item {\color{A}this is colored A}
            \item {\color{B}this is colored B}

See how both the defined colors a and A as well as b and B are the same?

Cheers, k

enter image description here

  • Hi, I've found my solution.
    – RenatoP
    Nov 7, 2018 at 7:29

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