tell blue from green in pair diagrams

[jo-pol]

Very hard for people to tell blue from green in pair diagrams.
4th bullet of https://groups.io/g/GroundForge/message/364,
see also note on color blinds in #197

[jo-pol]

Related code below. It looks like it only needs a change of the hexadecimal values in the first cited code section and compile it with one of the toJS scripts.

Side note: The code would more stable if availableColors was assigned from colors.keys.filterNot(_.isEmpty)

GroundForge/src/main/scala/dibl/Stitches.scala

Lines 149 to 157 in 8be8df1

	val colors: Map[String, String] = Map(
	"" -> "#000",
	"red" -> "#f00",
	"blue" -> "#18C",
	"green" -> "#080",
	"brown" -> "#c90",
	"purple" -> "#c3f",
	"yellow" -> "#ee0",
	"turquoise" -> "#0f9")

GroundForge/src/main/scala/dibl/Stitches.scala

Line 113 in 8be8df1

private val availableColors = Set("red", "green", "purple", "blue", "brown", "turquoise")

GroundForge/src/main/scala/dibl/DiagramSvg.scala

Lines 101 to 114 in 3a3d93b

	| ${startMarker("red")}
	| ${startMarker("blue")}
	| ${startMarker("green")}
	| ${startMarker("brown")}
	| ${startMarker("purple")}
	| ${startMarker("yellow")}
	| ${startMarker("turquoise")}
	| ${endMarker("red")}
	| ${endMarker("blue")}
	| ${endMarker("green")}
	| ${endMarker("brown")}
	| ${endMarker("purple")}
	| ${endMarker("yellow")}
	| ${endMarker("turquoise")}

GroundForge/src/main/scala/dibl/DiagramSvg.scala

Line 153 in 3a3d93b

case (key,value) => s"; marker-$key: url('#$key-$value')"

[jo-pol]

Test sample

[jo-pol]

You can play with the inspector of a browser to figure out a pallet. A screenshot from FireFox shows how to change the stroke colors:

[jo-pol]

See also the proposed incomplete set of colors: https://github.com/d-bl/GroundForge#colors

[jo-pol]

A generated color scheme has a mismatch between turquoise and orange. According to the generator it is not color blind safe either. Looking at the diagrams meant for captions in #205 it is still hard to tell blue from green. Any opinions/suggestions?

From https://colorbrewer2.org/#type=qualitative&scheme=Set1&n=7
['#e41a1c','#377eb8','#4daf4a','#984ea3','#ff7f00','#ffff33','#a65628']

GroundForge/src/test/scala/dibl/StitchesSpec.scala

Lines 28 to 54 in da16538

	"" -> "purple", // default is ctc
	"t" -> "",
	"ct" -> "green",
	"tc" -> "green",
	"tct" -> "green",
	"ctc" -> "purple",
	"ctct" -> "red",
	"tctc" -> "red",
	"tctct" -> "red",
	"ttctc" -> "red",
	"ctctt" -> "red",
	"cttc" -> "turquoise",
	"tcttc" -> "turquoise",
	"cttct" -> "turquoise",
	"cltc" -> "brown",
	"crtc" -> "brown",
	"crrc" -> "brown",
	"clllc" -> "brown",
	"ctttc" -> "brown",
	"ctctc" -> "blue",
	"ctctct" -> "blue",
	"tctctc" -> "blue",
	"ctctctc" -> "blue",
	"cllcrrcllc" -> "yellow",
	"crrcllcrrc" -> "yellow",
	"cllcrrcllcrrc" -> "yellow",
	"crrcllcrrcllc" -> "yellow",

[jo-pol]

Obsolete due to the new 4-color per stitch approach. Except for the droste pair diagrams, but these are only kept alive on an as-is basis.