SVG/CSS stroke dashed line with two colors - is it possible?
Solution 1
This is not possible in SVG with just one element, but you can use two different rects and then apply a stroke-dashoffset: x
...
rect.stroke-red {
stroke: red;
fill: none;
stroke-width: 5;
}
rect.stroke-green {
stroke: green;
fill: none;
stroke-dasharray: 5,5;
stroke-width: 5;
}
<svg xmlns="http://www.w3.org/2000/svg">
<rect class="stroke-red" x="10" y="10" width="101" height="101" />
<rect class="stroke-green" x="10" y="10" width="101" height="101" />
</svg>
Solution 2
Building on the answer from @duopixel, you can use the stroke-dasharray
property to build up a fairly complex pattern with multiple colors:
.L4 {
stroke: #000;
stroke-dasharray: 20,10,5,5,5,10;
}
.L5 {
stroke: #AAA;
stroke-dasharray: 0,20,10,15,10,0
}
.L6 {
stroke: #DDD;
stroke-dasharray: 0,35,5,15
}
See http://jsfiddle.net/colin_young/Y38u9/ demonstrating lines and a circle with the composite dash pattern.
Updated with SO snippet:
svg {
width: 100%;
height: 160px;
}
path, circle {
stroke-width: 4;
}
text {
alignment-baseline: central;
font-family: sans-serif;
font-size: 10px;
stroke-width: 0;
fill: #000;
text-anchor: middle;
}
.dim {
stroke: #AAA;
stroke-width: 1;
stroke-dasharray: 1, 1;
}
circle.dim {
fill: #FFF;
}
.L4 {
stroke: #000;
stroke-dasharray: 20, 10, 5, 5, 5, 10;
}
.L5 {
stroke: #AAA;
stroke-dasharray: 0, 20, 10, 15, 10, 0
}
.L6 {
stroke: #DDD;
stroke-dasharray: 0, 35, 5, 15
}
<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
<g fill="none" stroke="black">
<path class="dim" d="M5 20 l0 80" />
<path class="dim" d="M25 20 l0 80 l-10 20" />
<path class="dim" d="M35 20 l0 80 l-10 30" />
<path class="dim" d="M40 20 l0 120" />
<path class="dim" d="M45 20 l0 80 l10 30" />
<path class="dim" d="M50 20 l0 80 l10 20" />
<path class="dim" d="M60 20 l0 80 l15 10" />
<text x="5" y="110">0</text>
<text x="5" y="125">20</text>
<text x="25" y="135">30</text>
<text x="40" y="150">35</text>
<text x="55" y="140">40</text>
<text x="65" y="125">45</text>
<text x="82" y="115">55</text>
<path class="L4" d="M5 20 l215 0" />
<path class="L5" d="M5 20 l215 0" />
<path class="L6" d="M5 20 l215 0" />
<!-- separated to show composition -->
<text x="5" y="70" style="text-anchor:start">Separated to show composition:</text>
<path class="L4" d="M5 80 l215 0" />
<path class="L5" d="M5 90 l215 0" />
<path class="L6" d="M5 100 l215 0" />
<circle class="L4" cx="400" cy="80" r="60" />
<circle class="L5" cx="400" cy="80" r="60" />
<circle class="L6" cx="400" cy="80" r="60" />
</g>
</svg>
Solution 3
One way:
<!doctype html> <html> <head> <title></title> <style> div { width: 100px; height: 100px; } .dashbox { border: 4px dashed blue; background: orange; } .dashbox > div { background: white; } </style> </head> <body> <div class="dashbox"> <div></div> </div> </body> </html>
That is, layer one element with one color behind another with another color [in the form of a dashed stroke].
Solution 4
Here is a CSS only solution.
<div style="
margin:1rem;
width:4rem;
height:4rem;
border:5px solid red;
outline:5px dashed green;
outline-offset: -5px;"
></div>
Comments
-
Andrew Mao almost 2 years
Is it possible to use CSS to define a line (or shape edge) with two alternating colors that are dashed? That is, if 1 and 2 are different colored pixels, then
1212121212121212 or 112211221122
I basically want some way to use stroke-dasharray with two colors. The line itself is completely colored.
If this is not possible, what is a good way to approximate it? For example, I could create a repeated linear gradient with two colors alternating, but this would be hard to set the two colors from javascript.
-
Andrew Mao over 11 yearsYour answer is good, but I'll point out that I prefer the implementation in the above comment - solid line rectangle behind a dashed line rectangle - for being less error-prone. It seems like the
stroke-dashoffset
could result in funny looking rectangles if the CSS was slightly off or the browser started the dashes in different places. -
Colin Young about 11 yearsI think if the browser is starting the dashes in different places that's a browser bug, and if the CSS is slightly off, you're going to have the same issues with the solution from @reisio. However, that answer will work for browsers that don't support SVG.
-
Wray Bowling about 10 yearsThe first version was actually better. @AndrewMao, overlaying the stripes on top of a solid stroke messes up the anti-aliasing. jsfiddle.net/rkzpC
-
Chuck almost 5 yearsReally nice example.