1 files changed, 47 insertions, 4 deletions

diff --git a/web_src/js/features/projects.js b/web_src/js/features/projects.js
index 0d619cab70..c02b81d1c6 100644
--- a/web_src/js/features/projects.js
+++ b/web_src/js/features/projects.js
@@ -23,7 +23,7 @@ export default async function initProject() {
           if (parseInt($(column).data('sorting')) !== i) {
             $.ajax({
               url: $(column).data('url'),
-              data: JSON.stringify({sorting: i}),
+              data: JSON.stringify({sorting: i, color: rgbToHex($(column).css('backgroundColor'))}),
               headers: {
                 'X-Csrf-Token': csrf,
                 'X-Remote': true,
@@ -62,10 +62,17 @@ export default async function initProject() {
   }
 
   $('.edit-project-board').each(function () {
-    const projectTitleLabel = $(this).closest('.board-column-header').find('.board-label');
+    const projectHeader = $(this).closest('.board-column-header');
+    const projectTitleLabel = projectHeader.find('.board-label');
     const projectTitleInput = $(this).find(
       '.content > .form > .field > .project-board-title',
     );
+    const projectColorInput = $(this).find('.content > .form > .field  #new_board_color');
+    const boardColumn = $(this).closest('.board-column');
+
+    if (boardColumn.css('backgroundColor')) {
+      setLabelColor(projectHeader, rgbToHex(boardColumn.css('backgroundColor')));
+    }
 
     $(this)
       .find('.content > .form > .actions > .red')
@@ -74,7 +81,7 @@ export default async function initProject() {
 
         $.ajax({
           url: $(this).data('url'),
-          data: JSON.stringify({title: projectTitleInput.val()}),
+          data: JSON.stringify({title: projectTitleInput.val(), color: projectColorInput.val()}),
           headers: {
             'X-Csrf-Token': csrf,
             'X-Remote': true,
@@ -84,6 +91,10 @@ export default async function initProject() {
         }).done(() => {
           projectTitleLabel.text(projectTitleInput.val());
           projectTitleInput.closest('form').removeClass('dirty');
+          if (projectColorInput.val()) {
+            setLabelColor(projectHeader, projectColorInput.val());
+          }
+          boardColumn.attr('style', `background: ${projectColorInput.val()}!important`);
           $('.ui.modal').modal('hide');
         });
       });
@@ -127,10 +138,11 @@ export default async function initProject() {
     e.preventDefault();
 
     const boardTitle = $('#new_board');
+    const projectColorInput = $('#new_board_color_picker');
 
     $.ajax({
       url: $(this).data('url'),
-      data: JSON.stringify({title: boardTitle.val()}),
+      data: JSON.stringify({title: boardTitle.val(), color: projectColorInput.val()}),
       headers: {
         'X-Csrf-Token': csrf,
         'X-Remote': true,
@@ -143,3 +155,34 @@ export default async function initProject() {
     });
   });
 }
+
+function setLabelColor(label, color) {
+  const red = getRelativeColor(parseInt(color.substr(1, 2), 16));
+  const green = getRelativeColor(parseInt(color.substr(3, 2), 16));
+  const blue = getRelativeColor(parseInt(color.substr(5, 2), 16));
+  const luminance = 0.2126 * red + 0.7152 * green + 0.0722 * blue;
+
+  if (luminance > 0.179) {
+    label.removeClass('light-label').addClass('dark-label');
+  } else {
+    label.removeClass('dark-label').addClass('light-label');
+  }
+}
+
+/**
+ * Inspired by W3C recommandation https://www.w3.org/TR/WCAG20/#relativeluminancedef
+ */
+function getRelativeColor(color) {
+  color /= 255;
+  return color <= 0.03928 ? color / 12.92 : ((color + 0.055) / 1.055) ** 2.4;
+}
+
+function rgbToHex(rgb) {
+  rgb = rgb.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);
+  return `#${hex(rgb[1])}${hex(rgb[2])}${hex(rgb[3])}`;
+}
+
+function hex(x) {
+  const hexDigits = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'];
+  return Number.isNaN(x) ? '00' : hexDigits[(x - x % 16) / 16] + hexDigits[x % 16];
+}