value2color

A simple JavaScript function to represent a value by a color intermediate between two specified colors.
For example, to create a color scale.

Usage

<script src="value2color/value2color.js"></script>

color = value2color(value[,minvalue[,maxvalue[,minColor[,maxColor[,underMinColor[,upperMaxColor]]]]]])

Where:

• value <Number> - represented value
• minvalue <Number> - the begin of the range of values, default 0
• maxvalue <Number> - the end of the range of values, default 10
• minColor <Array> or <String> - the begin of the range of colors, color for minvalue, array [r,g,b] or html color string: rgb(r,g,b) or #rrggbb. Default rgb(255,0,0)
• maxColor <Array> or <String> - the end of the range of colors, color for maxvalue, array [r,g,b] or html color string: rgb(r,g,b) or #rrggbb. Default rgb(0,255,0)
• underMinColor <String> - color for values less than minvalue, html color string: rgb(r,g,b) or #rrggbb. Default rgb(155,0,0)
• upperMaxColor <String> - color for values more than maxvalue, html color string: rgb(r,g,b) or #rrggbb. Default rgb(200,250,240)

Return: <String> html color string "rgb(r,g,b)"