1 files changed, 34 insertions, 0 deletions
diff --git a/web/gui/src/dashboard.js/colors.js b/web/gui/src/dashboard.js/colors.js
new file mode 100644
index 000000000..4b98c017c
--- /dev/null
+++ b/web/gui/src/dashboard.js/colors.js
@@ -0,0 +1,34 @@
+NETDATA.colorHex2Rgb = function (hex) {
+    // Expand shorthand form (e.g. "03F") to full form (e.g. "0033FF")
+    let shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;
+    hex = hex.replace(shorthandRegex, function (m, r, g, b) {
+        return r + r + g + g + b + b;
+    });
+
+    let result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
+    return result ? {
+        r: parseInt(result[1], 16),
+        g: parseInt(result[2], 16),
+        b: parseInt(result[3], 16)
+    } : null;
+};
+
+NETDATA.colorLuminance = function (hex, lum) {
+    // validate hex string
+    hex = String(hex).replace(/[^0-9a-f]/gi, '');
+    if (hex.length < 6) {
+        hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
+    }
+
+    lum = lum || 0;
+
+    // convert to decimal and change luminosity
+    let rgb = "#";
+    for (let i = 0; i < 3; i++) {
+        let c = parseInt(hex.substr(i * 2, 2), 16);
+        c = Math.round(Math.min(Math.max(0, c + (c * lum)), 255)).toString(16);
+        rgb += ("00" + c).substr(c.length);
+    }
+
+    return rgb;
+};