The PLplot Plotting Library: Programmer's Reference Manual
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### `plcol1`: Set color, map1

`plcol1` (col1);

Sets the color for color map1 (see the Section called Color Map1 in Chapter 3).

`col1` (`PLFLT`, input) This value must be in the range from 0. to 1. and is mapped to color using the continuous map1 color palette which by default ranges from blue to the background color to red. The map1 palette can also be straightforwardly changed by the user with `plscmap1` or `plscmap1l`.

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`plcol0`: Set color, map0 | Up | `plcont`: Contour plot