Update DCMS, Defra, DSIT and FCDO brand colours

CHANGELOG.md

@@ -4,6 +4,12 @@ For advice on how to use these release notes see [our guidance on staying up to
 
 ## Unreleased
 
+### Fixes
+
+We've made fixes to GOV.UK Frontend in the following pull requests:
+
+- [#5396: Update DCMS, Defra, DSIT and FCDO brand colours](https://github.com/alphagov/govuk-frontend/pull/5396)
+
 ## v5.7.0 (Feature release)
 
 To install this version with npm, run `npm install govuk-frontend@5.7.0`. You can also find more information about [how to stay up to date](https://frontend.design-system.service.gov.uk/staying-up-to-date/#updating-to-the-latest-version) in our documentation.

packages/govuk-frontend/src/govuk/settings/_colours-organisations.scss

@@ -60,7 +60,7 @@ $_govuk-organisation-colours: (
       "`department-for-communities-local-government` became `ministry-of-housing-communities-local-government` in 2018."
   ),
   "department-for-culture-media-sport": (
-    colour: #d6006e
+    colour: #ed1588
   ),
   "department-for-digital-culture-media-sport": (
     colour: #d40072,
@@ -75,8 +75,8 @@ $_govuk-organisation-colours: (
     contrast-safe: #00852f
   ),
   "department-for-environment-food-rural-affairs": (
-    colour: #00af43,
-    contrast-safe: #008733
+    colour: #00a33b,
+    contrast-safe: #008531
   ),
   "department-for-exiting-the-european-union": (
     colour: #009fe3,
@@ -98,7 +98,7 @@ $_govuk-organisation-colours: (
       "`department-for-levelling-up-housing-communities` was renamed to `ministry-of-housing-communities-local-government` in 2024."
   ),
   "department-for-science-innovation-technology": (
-    colour: #00f9f8,
+    colour: #00f8f8,
     contrast-safe: #008180
   ),
   "department-for-transport": (
@@ -128,7 +128,7 @@ $_govuk-organisation-colours: (
     deprecation-message: "`foreign-commonwealth-office` became `foreign-commonwealth-development-office` in 2018."
   ),
   "foreign-commonwealth-development-office": (
-    colour: #002269
+    colour: #012069
   ),
   "government-equalities-office": (
     colour: #0056b8,