Goodnight everyone.
I am trying to define new colors to use in a tcolorbox environment. Such definitions are in the preamble of the document.
When I go to use "ama" color (the last ones that I have define) it throws me the following error: "Paragraph ended before \XC@definec@lor was complete" (line 16)
What I interpret is that the definition of the color "ama" is not being read to me, since it also throws me the error "Package xcolor Error: Undefined color `ama'. ...=dark blue,colback=ama,title=Graphic I ]" in the line where I put the tcolorbox with the color (line 20)
I've been able to recreate the error with smaller code so you can see it.
I can upload an image in which the previous lines of code are marked if they consider it necessary.
I have updated the packages (and checked for updates) in MikTeX. The text editor I use is TexStudio.
\documentclass[12pt,a4paper]{article}
\usepackage[x11names]{xcolor}
\usepackage[listings,theorems,skins,most]{tcolorbox}
\usepackage{tikz}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{mathtools}
%colors defined by me
\definecolor{naranja}{RGB}{247, 159, 80}
\definecolor{azul}{HTML}{39B0FD}
\definecolor{azuloscuro}{HTML}{344D67}
\definecolor{rojito}{HTML{DC3535}
\definecolor{ama}{HTML}{F3ECB0}
\begin{document}
\begin{minipage}{0.5\textwidth}
\begin{tcolorbox}[colframe=azuloscuro,colback=ama,title=Gráfico I]
\begin{tikzpicture}
\draw [help lines,gray] (0,0) grid (8,10);
\draw [-stealth,ultra thick] (0,0) -- (0,10.3) node[above]{$y$};
\draw [-stealth,ultra thick] (0,0) -- (8.3,0) node[right]{$x$};
\foreach \y in {2,...,6}{\draw [line width=0.5mm,-stealth,yscale=0.2,domain=0:8,samples=100,red] plot (\x,{\x*\y});}
\end{tikzpicture}
\end{tcolorbox}
\end{minipage}
\quad
\begin{minipage}{0.5\textwidth}
text only text only text only text only hello text only nly text only text only text only hello text only nly text only text only text only hello text only nly text only text only text only hello text only nly text only text only text only hello text only nly text only text only text only hello text onlynly text only text only text only hello text onlynly text only text only text only hello text onlynly text only text only text only hello text only
\[ f(x)=\begin{cases}
\sqrt{x^2-9} & \mbox{si} \ \ -9<x\leqslant-3 \\
4|x-3|-1 & \mbox{si} \ \ -3<x<4 \\
2x\mbox{sgn}(x^2-2) & \mbox{si} \ \ 5\leqslant x \leqslant 9 \\[0.2cm]
\displaystyle \frac{6x-1}{x-9} & \mbox{si} \ \ x>9 \\
\end{cases}\]
\end{minipage}
\end{document}```
