Created
March 2, 2012 14:46
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Colour tests
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| <html> | |
| <head> | |
| <title>Testing colours</title> | |
| </head> | |
| <body> | |
| <script src="https://raw.github.com/justincormack/d3/master/d3.v2.min.js"></script> | |
| <p>Brighter and darker, RGB vs HSL vs CIELab</p> | |
| <svg id="rgb-bright1"></svg> | |
| <svg id="hsl-bright1"></svg> | |
| <svg id="lab-bright1"></svg> | |
| <svg id="rgb-bright2"></svg> | |
| <svg id="hsl-bright2"></svg> | |
| <svg id="lab-bright2"></svg> | |
| <svg id="rgb-bright3"></svg> | |
| <svg id="hsl-bright3"></svg> | |
| <svg id="lab-bright3"></svg> | |
| <p>Hue</p> | |
| <svg id="lab-hue1"></svg> | |
| <script> | |
| var c = d3.rgb(27, 160, 55); | |
| draw(c, "#rgb-bright1") | |
| draw(c.hsl(), "#hsl-bright1"); | |
| draw(c.lab(), "#lab-bright1"); | |
| var c = d3.lab(50, 50, -58); | |
| draw(c.rgb(), "#rgb-bright2") | |
| draw(c.rgb().hsl(), "#hsl-bright2"); | |
| draw(c, "#lab-bright2"); | |
| var c = d3.lab(45, 0, 20); | |
| draw(c.rgb(), "#rgb-bright3") | |
| draw(c.rgb().hsl(), "#hsl-bright3"); | |
| draw(c, "#lab-bright3"); | |
| var c = d3.lab(d3.rgb(27, 160, 55)); | |
| hue(c, "#lab-hue1"); | |
| function draw(c, id) { | |
| var d = [c.darker().darker().darker(), c.darker().darker(), c.darker(), c, c.brighter(), c.brighter().brighter(), c.brighter().brighter().brighter()]; | |
| var svg = d3.select(id) | |
| .attr("width", 1000) | |
| .attr("height", 30); | |
| var w = 1000 / 7; | |
| svg.selectAll("rect") | |
| .data(d) | |
| .enter().append("rect") | |
| .attr("fill", function(d) {return d;}) | |
| .attr("x", function(d, i) {return i * w;}) | |
| .attr("y", 0) | |
| .attr("width", w) | |
| .attr("height", 50); | |
| } | |
| function hue(c, id) { | |
| var d = [] | |
| var n = 36; | |
| for (i = 0; i < n; i++) { | |
| d[i] = c.hue(c.hue() + i * (360 / n)); | |
| } | |
| var svg = d3.select(id) | |
| .attr("width", 1000) | |
| .attr("height", 30); | |
| var w = 1000 / n; | |
| svg.selectAll("rect") | |
| .data(d) | |
| .enter().append("rect") | |
| .attr("fill", function(d) {return d;}) | |
| .attr("x", function(d, i) {return i * w;}) | |
| .attr("y", 0) | |
| .attr("width", w) | |
| .attr("height", 50); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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