diff --git a/assets/multiqc_config.yml b/assets/multiqc_config.yml
index 5ad8bf4..16ee327 100644
--- a/assets/multiqc_config.yml
+++ b/assets/multiqc_config.yml
@@ -23,6 +23,11 @@ custom_data:
     description: |
       RGB map from RAW data versus RGB map after gradient correction. Corpus callosum should be in red.
       ### **Using the option use_preqc is highly experimental. Please be careful.**
+      <div style="background-color: #ffcccc; color: red; padding: 10px; border: 2px solid red;">
+        Be careful: If the colours match the reference image, it is important to ALSO look at the
+        eigenvectors of the tensors from the DTI model located in the folder (<code>dwi/sub-01_model-tensor_param-v1_dwimap.nii.gz</code>) 
+        to ensure that the orientation is correct (see <a href="https://scilus.github.io/nf-mouse/guides/faq/" target="_blank">FAQ</a>).
+      </div>
     plot_type: "image"
 
   pre_qc_sampling_mqc:
diff --git a/assets/nf-mouse-light-logo.png b/assets/nf-mouse-light-logo.png
index 37c1a99..7750d96 100644
Binary files a/assets/nf-mouse-light-logo.png and b/assets/nf-mouse-light-logo.png differ
diff --git a/assets/reference_rgb_mqc.png b/assets/reference_rgb_mqc.png
new file mode 100644
index 0000000..49c32fe
Binary files /dev/null and b/assets/reference_rgb_mqc.png differ
diff --git a/main.nf b/main.nf
index 794cb3b..ada0a11 100644
--- a/main.nf
+++ b/main.nf
@@ -49,10 +49,12 @@ workflow get_data {
         mask_channel = Channel.fromPath("$input/**/*mask.nii.gz")
                         .map { mask_file -> def sid = mask_file.parent.name
                         [[id: sid], mask_file] }
+        template_channel = Channel.fromPath("$projectDir/assets/reference_rgb_mqc.png")
 
     emit:
         dwi   = dwi_channel
         mask  = mask_channel
+        template_rgb = template_channel
 }
 
 workflow {
@@ -77,9 +79,10 @@ workflow {
             bval:   [meta, bval]
             bvec:   [meta, bvec]
         }
+    ch_ref_rgb = data.template_rgb
 
     if ( params.run_preqc ) {
-        PRE_QC(ch_dwi_bvalbvec.dwi.join(ch_dwi_bvalbvec.bvs_files))
+        PRE_QC(ch_dwi_bvalbvec.dwi.join(ch_dwi_bvalbvec.bvs_files).combine(ch_ref_rgb))
         ch_multiqc_files = ch_multiqc_files.mix(PRE_QC.out.rgb_mqc)
         ch_multiqc_files = ch_multiqc_files.mix(PRE_QC.out.sampling_mqc)
         if (params.use_preqc){
@@ -222,5 +225,5 @@ workflow {
         return tuple(meta, files)
     }
 
-    MULTIQC(ch_multiqc_files, [], ch_multiqc_config.toList(), [], channel.fromPath("${projectDir}/assets/logo_bg.png").toList(), [], [])
+    MULTIQC(ch_multiqc_files, [], ch_multiqc_config.toList(), [], channel.fromPath("${projectDir}/assets/nf-mouse-light-logo.png").toList(), [], [])
 }
diff --git a/modules/local/mouse/preqc/main.nf b/modules/local/mouse/preqc/main.nf
index 2170f4e..d69d823 100644
--- a/modules/local/mouse/preqc/main.nf
+++ b/modules/local/mouse/preqc/main.nf
@@ -5,7 +5,7 @@ process PRE_QC {
     container "scilus/scilus:2.2.0"
 
     input:
-    tuple val(meta), path(dwi), path(bval), path(bvec)
+    tuple val(meta), path(dwi), path(bval), path(bvec), path(ref_rgb)
 
     output:
     tuple val(meta), path("*__stride_dwi.nii.gz")                                       , emit: dwi
@@ -115,11 +115,11 @@ process PRE_QC {
             ${prefix}__sag_slice_\${mid_slice_sagittal}.png \
             ${prefix}_rgb_\${p}_mqc.png
 
-        convert -annotate +20+230 "RGB \${p}" -fill white -pointsize 30 ${prefix}_rgb_\${p}_mqc.png ${prefix}_rgb_\${p}_mqc.png
+        convert -annotate +20+40 "RGB \${p}" -fill white -pointsize 30 -undercolor black ${prefix}_rgb_\${p}_mqc.png ${prefix}_rgb_\${p}_mqc.png
 
         rm -rf *_slice_*png
     done
-    convert -append ${prefix}_rgb_pre_mqc.png ${prefix}_rgb_post_mqc.png ${prefix}__rgb_mqc.png
+    convert -append ${prefix}_rgb_pre_mqc.png ${prefix}_rgb_post_mqc.png $ref_rgb ${prefix}__rgb_mqc.png
 
     cat <<-END_VERSIONS > versions.yml
     "${task.process}":