part Light, part dark when setting "Dark" or "Dark (System)" as the default theme

[bkhouri]

Jenkins and plugins versions report

Environment

Jenkins: 2.452.2
OS: Linux - 6.8.0-36-generic
Java: 17.0.11 - Ubuntu (OpenJDK 64-Bit Server VM)
---
PrioritySorter:5.1.0
analysis-model-api:12.3.3
ansible:403.v8d0ca_dcb_b_502
ant:497.v94e7d9fffa_b_9
antisamy-markup-formatter:162.v0e6ec0fcfcf6
apache-httpcomponents-client-4-api:4.5.14-208.v438351942757
apache-httpcomponents-client-5-api:5.3.1-110.v77252fb_d4da_5
artifactory:4.0.7
asm-api:9.7-33.v4d23ef79fcc8
atlassian-bitbucket-server-integration:4.0.0
audit-log:1.3
audit-trail:361.v82cde86c784e
authentication-tokens:1.113.v81215a_241826
autocancel:1.0.5
badge:1.13
bitbucket:241.v6d24a_57f9359
blueocean:1.27.13
blueocean-bitbucket-pipeline:1.27.13
blueocean-commons:1.27.13
blueocean-config:1.27.13
blueocean-core-js:1.27.13
blueocean-dashboard:1.27.13
blueocean-display-url:2.4.2
blueocean-events:1.27.13
blueocean-git-pipeline:1.27.13
blueocean-github-pipeline:1.27.13
blueocean-i18n:1.27.13
blueocean-jwt:1.27.13
blueocean-personalization:1.27.13
blueocean-pipeline-api-impl:1.27.13
blueocean-pipeline-editor:1.27.13
blueocean-pipeline-scm-api:1.27.13
blueocean-rest:1.27.13
blueocean-rest-impl:1.27.13
blueocean-web:1.27.13
bootstrap5-api:5.3.3-1
bouncycastle-api:2.30.1.78.1-248.ve27176eb_46cb_
branch-api:2.1169.va_f810c56e895
build-blocker-plugin:166.vc82fc20b_a_ed6
build-name-setter:2.4.2
build-timeout:1.33
caffeine-api:3.1.8-133.v17b_1ff2e0599
checks-api:2.2.0
cloudbees-bitbucket-branch-source:887.va_d359b_3d2d8d
cloudbees-folder:6.928.v7c780211d66e
command-launcher:107.v773860566e2e
commons-compress-api:1.26.1-2
commons-lang3-api:3.14.0-76.vda_5591261cfe
commons-text-api:1.12.0-119.v73ef73f2345d
config-file-provider:973.vb_a_80ecb_9a_4d0
configuration-as-code:1810.v9b_c30a_249a_4c
credentials:1361.v56f5ca_35d21c
credentials-binding:681.vf91669a_32e45
dark-theme:439.vdef09f81f85e
data-tables-api:2.0.8-1
description-setter:239.vd0a_6b_785f92d
display-url-api:2.204.vf6fddd8a_8b_e9
docker-commons:439.va_3cb_0a_6a_fb_29
docker-workflow:580.vc0c340686b_54
durable-task:555.v6802fe0f0b_82
echarts-api:5.5.0-1
eddsa-api:0.3.0-4.v84c6f0f4969e
email-ext:1814.v404722f34263
envinject:2.908.v66a_774b_31d93
envinject-api:1.199.v3ce31253ed13
extended-read-permission:53.v6499940139e5
favorite:2.218.vd60382506538
font-awesome-api:6.5.2-1
forensics-api:2.4.0
git:5.2.2
git-client:5.0.0
git-parameter:0.9.19
git-server:126.v0d945d8d2b_39
github:1.39.0
github-api:1.318-461.v7a_c09c9fa_d63
github-branch-source:1789.v5b_0c0cea_18c3
gradle:2.12
groovy-postbuild:228.vcdb_cf7265066
gson-api:2.11.0-41.v019fcf6125dc
handy-uri-templates-2-api:2.1.8-30.v7e777411b_148
htmlpublisher:1.35
instance-identity:185.v303dc7c645f9
ionicons-api:74.v93d5eb_813d5f
jackson2-api:2.17.0-379.v02de8ec9f64c
jakarta-activation-api:2.1.3-1
jakarta-mail-api:2.1.3-1
javadoc:243.vb_b_503b_b_45537
javax-activation-api:1.2.0-7
javax-mail-api:1.6.2-10
jaxb:2.3.9-1
jdk-tool:73.vddf737284550
jenkins-design-language:1.27.13
jersey2-api:2.42-147.va_28a_44603b_d5
jfrog:1.5.0
jira:3.13
jira-steps:2.0.165.v8846cf59f3db
jjwt-api:0.11.5-112.ve82dfb_224b_a_d
job-dsl:1.87
jobConfigHistory:1229.v3039470161a_d
joda-time-api:2.12.7-29.v5a_b_e3a_82269a_
jquery3-api:3.7.1-2
jsch:0.2.16-86.v42e010d9484b_
json-api:20240303-41.v94e11e6de726
json-path-api:2.9.0-58.v62e3e85b_a_655
junit:1265.v65b_14fa_f12f0
ldap:725.v3cb_b_711b_1a_ef
lockable-resources:1255.vf48745da_35d0
login-theme:146.v64a_da_cf70ea_6
mailer:472.vf7c289a_4b_420
mapdb-api:1.0.9-40.v58107308b_7a_7
mask-passwords:173.v6a_077a_291eb_5
matrix-auth:3.2.2
matrix-project:832.va_66e270d2946
maven-plugin:3.23
mercurial:1260.vdfb_723cdcc81
metrics:4.2.21-451.vd51df8df52ec
mina-sshd-api-common:2.13.1-117.v2f1a_b_66ff91d
mina-sshd-api-core:2.13.1-117.v2f1a_b_66ff91d
monitoring:1.99.0
nodelabelparameter:1.12.0
oauth-credentials:0.653.v14cf2088e950
okhttp-api:4.11.0-172.vda_da_1feeb_c6e
ownership:0.13.0
pam-auth:1.11
parameterized-scheduler:277.v61a_4b_a_49a_c5c
percentage-du-node-column:0.1.0
pipeline-build-step:540.vb_e8849e1a_b_d8
pipeline-github-lib:61.v629f2cc41d83
pipeline-graph-analysis:216.vfd8b_ece330ca_
pipeline-graph-view:304.va_f2a_16b_e4964
pipeline-groovy-lib:727.ve832a_9244dfa_
pipeline-input-step:495.ve9c153f6067b_
pipeline-milestone-step:119.vdfdc43fc3b_9a_
pipeline-model-api:2.2203.v89fa_170c2b_f5
pipeline-model-definition:2.2203.v89fa_170c2b_f5
pipeline-model-extensions:2.2203.v89fa_170c2b_f5
pipeline-rest-api:2.34
pipeline-stage-step:312.v8cd10304c27a_
pipeline-stage-tags-metadata:2.2203.v89fa_170c2b_f5
pipeline-stage-view:2.34
pipeline-timeline:1.0.3
pipeline-utility-steps:2.17.0
plain-credentials:183.va_de8f1dd5a_2b_
platformlabeler:2596.v4304971d3eb_b_
plugin-util-api:4.1.0
prism-api:1.29.0-15
pubsub-light:1.18
rebuild:332.va_1ee476d8f6d
resource-disposer:0.23
role-strategy:727.vd344b_eec783d
saferestart:0.7
saml:4.464.vea_cb_75d7f5e0
scm-api:690.vfc8b_54395023
script-security:1341.va_2819b_414686
shiningpanda:0.24
simple-theme-plugin:191.vcd207ef9dd24
slack:722.vd07f1ea_7ff40
snakeyaml-api:2.2-111.vc6598e30cc65
sse-gateway:1.27
ssh-agent:367.vf9076cd4ee21
ssh-credentials:337.v395d2403ccd4
ssh-slaves:2.973.v0fa_8c0dea_f9f
sshd:3.330.vc866a_8389b_58
structs:338.v848422169819
theme-manager:262.vc57ee4a_eda_5d
timestamper:1.27
token-macro:400.v35420b_922dcb_
trilead-api:2.147.vb_73cc728a_32e
variant:60.v7290fc0eb_b_cd
versioncolumn:243.vda_c20eea_a_8a_f
warnings-ng:11.3.0
workflow-aggregator:600.vb_57cdd26fdd7
workflow-api:1316.v33eb_726c50b_a_
workflow-basic-steps:1058.vcb_fc1e3a_21a_9
workflow-cps:3903.v48a_8836749e9
workflow-durable-task-step:1360.v82d13453da_a_f
workflow-job:1400.v7fd111b_ec82f
workflow-multibranch:783.787.v50539468395f
workflow-scm-step:427.v4ca_6512e7df1
workflow-step-api:657.v03b_e8115821b_
workflow-support:907.v6713a_ed8a_573
ws-cleanup:0.46
xcode-plugin:2.0.17-565.v1c48051d46ef

What Operating System are you using (both controller, and any agents involved in the problem)?

The controller is running Ubuntu Server 24.04 LTS. I tried accessing the Jenkins UI via Safari and Chrome and both yield the same results.

Reproduction steps

1. Go to Manage Jenkins > Appearance
2. Select "Dark (System)" as the default
3. Click "Save"
4. Navigate to the pipeline-console output of a Jenkins build (e.g.: http://<my_instance>/job/bootstrap/4/pipeline-console/)
5. Navigate to the "Jenkins > Manage Jenkins > Configuration as Code > View Configuration"

Expected Results

In step 2 of the reproductions steps, notice how the "Dark" them preview is different compared to the Jenkins Theme Manager plugin page. In step 3 and beyond, I expected to see a Dark theme on each Jenkins page.

Actual Results

• In step 3. a light theme was seen
• In step 4, it appears there are some page elements that respect the dark theme
• In step 4, there YAML configuration is in dark mode, but the rest is light mode.

Anything else?

No response

Are you interested in contributing a fix?

No response