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You can make of scriptable options like so:
const yVal = 12;
const primeCrolor = "green";
const secondColor = "red"
const options = {
type: 'bar',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: '# of Votes',
data: [12, 19, 3, 5, 2, 3],
backgroundColor: (ctx) => {
if (!ctx.parsed) {
return secondColor
}
const allTicks = ctx.chart.scales.y.ticks.map(e => e.value);
return (allTicks.includes(yVal) && ctx.parsed.y === yVal) ? primeCrolor : secondColor;
}
}]
},
options: {
// Scale config only needed for example to force the correct labels
scales: {
y: {
min: 0,
max: 20,
ticks: {
stepSize: 2
}
}
}
}
}
const ctx = document.getElementById('chartJSContainer').getContext('2d');
new Chart(ctx, options);
<body>
<canvas id="chartJSContainer" width="600" height="400"></canvas>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.5.1/chart.js"></script>
</body>
Source:stackexchange.com