color pictures

diff --git a/doc/graphviz colors/light colors/aqua.png b/doc/graphviz colors/light colors/aqua.png
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diff --git a/doc/graphviz colors/light colors/olivedrab2.png b/doc/graphviz colors/light colors/olivedrab2.png
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diff --git a/doc/graphviz colors/light colors/orange.png b/doc/graphviz colors/light colors/orange.png
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diff --git a/doc/graphviz colors/light colors/peachpuff2.png b/doc/graphviz colors/light colors/peachpuff2.png
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index 0000000..d1d16d4
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diff --git a/doc/graphviz colors/light colors/seagreen1.png b/doc/graphviz colors/light colors/seagreen1.png
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index 0000000..d48919f
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diff --git a/doc/graphviz colors/light colors/violet.png b/doc/graphviz colors/light colors/violet.png
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index 0000000..9a347f0
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