iOS colors recommended for both light and dark backgrounds; mouse over background rectangle to change its greyscale value.
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January 22, 2017 19:48
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iOS color recs
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| #block { | |
| position: absolute; | |
| left: 200px; | |
| } | |
| #rgb_value { | |
| position: absolute; | |
| left: 200px; | |
| top: 35px; | |
| font-family: sans-serif; | |
| } | |
| .color { | |
| pointer-events: none; | |
| } | |
| </style> | |
| <body> | |
| <h1 id="rgb_value"></h1> | |
| <div id="block"></div> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script type="text/javascript"> | |
| var height = 350, | |
| width = 500; | |
| // ref [1] | |
| var colors = { | |
| red: "rgb(255,59,48)", | |
| orange: "rgb(255,149,0)", | |
| yellow: "rgb(255,204,0)", | |
| green: "rgb(76,217,100)", | |
| teal_blue: "rgb(90,200,250)", | |
| blue: "rgb(0,122,255)", | |
| purple: "rgb(88,86,214)", | |
| pink: "rgb(255,45,85)" | |
| }; | |
| // position color rects | |
| var yScaleRect = d3.scaleBand() | |
| .domain(Object.keys(colors)) | |
| .rangeRound([0, width]) | |
| .paddingInner([0.1]) | |
| .paddingOuter([0.1]); | |
| // fill color of background rect dependent on mouse x coords | |
| var scaleBW = d3.scaleLinear() | |
| .domain([10, width-10]) | |
| .range(["rgb(255,255,255)", "rgb(0,0,0)"]); | |
| // interpolate rgb for transition on load | |
| // ref [3] for '1e-6' instead of '0' | |
| var i = d3.interpolateRound(255, 1e-6); | |
| svg = d3.select("#block") | |
| .append("svg") | |
| .attr("height", height) | |
| .attr("width", width); | |
| var rect_bckgrnd = svg.append("rect") | |
| .attr("x", 0) | |
| .attr("y", 100) | |
| .attr("width", width) | |
| .attr("height", 150) | |
| .attr("rx", 10) | |
| .attr("ry", 10) | |
| .on("mousemove", () => { | |
| rect_bckgrnd.call(updateFill, d3.event.x - 200); | |
| }); | |
| // transition background rect from white to black | |
| rect_bckgrnd.style("fill", "rgb(255,255,255)") | |
| .transition(["onload_w_to_b"]) | |
| .duration(2500) | |
| .style("fill", "rgb(0,0,0)"); | |
| //update text of rgb value during rect transition; ref [2] | |
| d3.transition(["onload_w_to_b"]) | |
| .duration(2500) | |
| .tween("text", () => { | |
| return function(t) { | |
| d3.select("#rgb_value") | |
| .text("rgb(" + i(t) + ", " + i(t) + ", " + i(t) + ")"); | |
| }; | |
| }); | |
| var color = svg.append("g") | |
| .selectAll("rect") | |
| .data(Object.keys(colors)) | |
| .enter() | |
| .append("rect") | |
| .attr("class", "color") | |
| .attr("x", d => yScaleRect(d)) | |
| .attr("y", 150) | |
| .attr("width", yScaleRect.bandwidth()) | |
| .attr("height", yScaleRect.bandwidth()) | |
| .attr("rx", 10) | |
| .attr("ry", 10) | |
| .style("fill", d => colors[d]); | |
| function updateFill(selection, x) { | |
| selection.style("fill", scaleBW(x)); | |
| // update text with rgb value | |
| d3.select("#rgb_value") | |
| .text(scaleBW(x)); | |
| } | |
| // references | |
| // [1] https://developer.apple.com/ios/human-interface-guidelines/visual-design/color/ | |
| // [2] http://bl.ocks.org/mbostock/7004f92cac972edef365 | |
| // [3] https://github.com/d3/d3-interpolate/blob/master/README.md#interpolateNumber | |
| </script> | |
| </body> | |
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