2b:null 2c:["$","title",null,{"children":"OKLCH picker | Eric Portis | Observable"}] 31:T494,

${picked_color_serialized}

${ ( is_imaginary(picked_color_object) ? htl.html`🚨 This color is imaginary, and impossible to create or see` : ( !(picked_color_object.inGamut("rec2020")) ? htl.html`⛔️ This color is outside of the Rec.2020 gamut, and irreproducable on any display` : ( !(picked_color_object.inGamut("p3")) ? htl.html`⚠️ This color is outside of the P3 gamut, and irreproducable on consumer displays` : '' ) ) ) }

32:T74cd,// CIE 1931 2 Degree Standard Observer // http://www-cvrl.ucsd.edu/cmfs.htm // I got it from https://github.com/facelessuser/coloraide/blob/bcfcdb5a6f75964f2af3cde66605c6dbec3cc636/coloraide/cmfs.py#L38 CIE_1931_2DEG = ({ 360: [0.000129900000, 0.000003917000, 0.000606100000], 361: [0.000145847000, 0.000004393581, 0.000680879200], 362: [0.000163802100, 0.000004929604, 0.000765145600], 363: [0.000184003700, 0.000005532136, 0.000860012400], 364: [0.000206690200, 0.000006208245, 0.000966592800], 365: [0.000232100000, 0.000006965000, 0.001086000000], 366: [0.000260728000, 0.000007813219, 0.001220586000], 367: [0.000293075000, 0.000008767336, 0.001372729000], 368: [0.000329388000, 0.000009839844, 0.001543579000], 369: [0.000369914000, 0.000011043230, 0.001734286000], 370: [0.000414900000, 0.000012390000, 0.001946000000], 371: [0.000464158700, 0.000013886410, 0.002177777000], 372: [0.000518986000, 0.000015557280, 0.002435809000], 373: [0.000581854000, 0.000017442960, 0.002731953000], 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Portis","avatar_url":"https://avatars-next.observableusercontent.com/d9d2bbfe6f3f798e9ec8f3a91e0c10b7f6890314fd52f40e190022e173d838a9","tier":"starter_2024"},"version":280,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"641c0f2eb3a762f9","login":"eeeps","name":"Eric Portis","avatar_url":"https://avatars-next.observableusercontent.com/d9d2bbfe6f3f798e9ec8f3a91e0c10b7f6890314fd52f40e190022e173d838a9","tier":null}],"members":[{"type":"team","id":"3301827868803b5f","login":"eeeps","name":"Eric Portis","avatar_url":"https://avatars-next.observableusercontent.com/d9d2bbfe6f3f798e9ec8f3a91e0c10b7f6890314fd52f40e190022e173d838a9","tier":"starter_2024","role":"editor"},{"type":"individual","id":"641c0f2eb3a762f9","login":"eeeps","name":"Eric Portis","avatar_url":"https://avatars-next.observableusercontent.com/d9d2bbfe6f3f798e9ec8f3a91e0c10b7f6890314fd52f40e190022e173d838a9","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":0,"collection":null,"type":"notebook","body":{"title":"OKLCH picker","cells":[{"id":0,"value":"# OKLCH picker\n## that warns about extreme colors","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":89,"value":"$31","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":79,"value":"viewof l = Inputs.range([0, 1], {label: \"Lightness\", step: 0.001})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":81,"value":"viewof c = Inputs.range([0, 1], {label: \"Chroma\", value: 0.2, step: 0.001})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":86,"value":"viewof h = Inputs.range([0, 360], {label: \"Hue\", step: 0.1})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":106,"value":"Plot.plot({\n width: 200,\n height: 200,\n marks: [\n // Spectral locus\n Plot.line(Object.values(CIE_1931_2DEG), {x: (d) => XYZ_to_xyY(d)[0], y: (d) => XYZ_to_xyY(d)[1], fill: '#eee'}),\n \n // THESE ARE TOO CONFUSING when they don't show the in=gamut xyz at the current Lightness\n // Rec.2020\n // Plot.line([\n // {x: 0.708, y: 0.292},\t\t\t\t\t\n // {x: 0.170, y: 0.797},\n // {x: 0.131, y: 0.046}\n // ], { x: 'x', y: 'y', fill: '#ddd' }),\n // DCI-P3 - ditto\n // Plot.line([\n // {x: 0.680, y: 0.320},\n // {x: 0.265, y: 0.690},\n // {x: 0.150, y: 0.060}\n // ], { x: 'x', y: 'y', fill: '#ccc' }),\n\n // picked color\n Plot.dot([color_to_xyY( picked_color_object )], {x: d=>d[0], y: d=>d[1], r: 5, fill: picked_color_serialized})\n ]\n})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":27,"value":"Color = (await import('https://colorjs.io/dist/color.js')).default","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":5,"value":"$32","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":9,"value":"// https://observablehq.com/@tmcw/understanding-point-in-polygon\npoint_in_polygon = function (point, vs) {\n // ray-casting algorithm based on\n // http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html\n\n var x = point[0], y = point[1];\n\n var inside = false;\n for (var i = 0, j = vs.length - 1; i < vs.length; j = i++) {\n var xi = vs[i][0], yi = vs[i][1];\n var xj = vs[j][0], yj = vs[j][1];\n\n var intersect = ((yi > y) != (yj > y))\n && (x < (xj - xi) * (y - yi) / (yj - yi) + xi);\n if (intersect) inside = !inside;\n }\n\n return inside;\n};","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":110,"value":"XYZ_to_xyY = function([x,y,z]) {\n\n // black\n // \"Watch out for black...In that case, you may want to set x and y to the chromaticity coordinates of your reference white.\" - http://www.brucelindbloom.com/index.html?Eqn_XYZ_to_xyY.html\n if (( x + y + z ) == 0) {\n return [0.3127138721, 0.3582521716, 0] // d65\n }\n \n return [\n x / ( x + y + z ),\n y / ( x + y + z ),\n y\n ];\n \n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":42,"value":"color_to_xyY = function(color) {\n \n // does this need to use E as a reference white, instead? if the xy diagram doesn't depend on white point (I didn't think it did...) why is XYZ white-point specific?\n \n return XYZ_to_xyY(color.to('xyz-d65').coords);\n \n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":97,"value":"picked_color_serialized = `oklch(${l} ${c} ${h}deg)`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":193,"value":"picked_color_object = new Color(picked_color_serialized)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":14,"value":"is_imaginary = function(color) {\n\n const [x,y,] = color_to_xyY(color);\n\n // non-linear interpolation between points might be nice\n return !( point_in_polygon(\n [x,y], \n Object.values(CIE_1931_2DEG).map((xyz) => XYZ_to_xyY(xyz).slice(0, 2))\n ) );\n\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":211,"value":"","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"}],"files":"$W33","stdlib":"1","titling":"auto"}} 30:"$2f:body"