1 files changed, 26 insertions, 0 deletions
diff --git a/node_modules/chroma-js/src/conversions/rgb2hsl.coffee b/node_modules/chroma-js/src/conversions/rgb2hsl.coffee
new file mode 100644
index 0000000000..2b1cfafd71
--- /dev/null
+++ b/node_modules/chroma-js/src/conversions/rgb2hsl.coffee
@@ -0,0 +1,26 @@
+
+rgb2hsl = (r,g,b) ->
+    if r != undefined and r.length >= 3
+        [r,g,b] = r
+    r /= 255
+    g /= 255
+    b /= 255
+
+    min = Math.min(r, g, b)
+    max = Math.max(r, g, b)
+
+    l = (max + min) / 2
+
+    if max == min
+        s = 0
+        h = Number.NaN
+    else
+        s = if l < 0.5 then (max - min) / (max + min) else (max - min) / (2 - max - min)
+
+    if r == max then h = (g - b) / (max - min)
+    else if (g == max) then h = 2 + (b - r) / (max - min)
+    else if (b == max) then h = 4 + (r - g) / (max - min)
+
+    h *= 60;
+    h += 360 if h < 0
+    [h,s,l]