Problems markers onthe scrollbar are too dim or too bright

[Yanpas]

Issue Type: Bug

With out of the box Dark theme problems (infos,warnings) are too dim:

And with out of the box Light theme these items (infos,warnings) are too bright, it's hard to find more important markers like currently selected word or search item:

These markers should be themable and/or default themes should be fixed

VS Code version: Code 1.34.0 (a622c65, 2019-05-15T21:55:35.507Z)
OS version: Linux x64 5.0.0-15-generic

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz (8 x 3811)
GPU Status	2d_canvas: enabled checker_imaging: disabled_off flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: disabled_software rasterization: disabled_software surface_synchronization: enabled_on video_decode: unavailable_off webgl: enabled webgl2: enabled
Load (avg)	1, 1, 1
Memory (System)	31.35GB (1.51GB free)
Process Argv	--unity-launch
Screen Reader	no
VM	0%

Extensions (57)

Extension	Author (truncated)	Version
better-comments	aar	2.0.5
atlascode	atl	1.4.0
better-toml	bun	0.3.2
ccls	ccl	0.1.26
path-intellisense	chr	1.4.2
doxdocgen	csc	0.4.2
vscode-eslint	dba	1.9.0
vscode-dash	dee	2.1.0
java-decompiler	dgi	0.0.2
xml	Dot	2.4.0
gitlens	eam	9.8.1
EditorConfig	Edi	0.13.0
prettier-vscode	esb	1.9.0
file-icons	fil	1.0.17
code-runner	for	0.9.9
kotlin	fwc	0.1.13
kotlindebug	fwc	0.2.2
code-file-nav	jak	0.7.2
svn-scm	joh	2.48.1
language-haskell	jus	2.6.0
favorites	kdc	2.4.5
saltstack	kor	0.0.5
sftp	lix	1.12.7
AWK	lug	0.0.2
bash-ide-vscode	mad	1.3.3
vscode-todo-parser	min	1.9.1
vscode-remote-workspace	mkl	0.42.0
vscode-language-pack-ru	MS-	1.34.2
vscode-kubernetes-tools	ms-	1.0.0
python	ms-	2019.4.12954
cpptools	ms-	0.23.1
csharp	ms-	1.19.1
Go	ms-	0.10.2
vscode-typescript-tslint-plugin	ms-	1.1.0
gradle-language	nac	0.2.3
printcode	nob	3.0.0
vscode-subword-navigation	ow	1.2.0
vscode-docker	Pet	0.6.2
java	red	0.45.0
vscode-yaml	red	0.4.1
vscode-sort-json	ric	1.13.0
perl	ric	0.9.0
bash-debug	rog	0.3.5
rust	rus	0.6.1
bash-beautify	sha	0.1.1
vscode-hexdump	sle	1.7.2
shellcheck	tim	0.6.0
vscode-lua	tri	0.12.4
cmake	twx	0.0.17
sort-lines	Tyr	1.8.0
cmake-tools	vec	1.1.3
vscodeintellicode	Vis	1.1.6
vscode-java-debug	vsc	0.18.0
debug	web	0.23.1
jinja	who	0.0.8
clang-format	xav	1.9.0
vscode-proto3	zxh	0.2.2

(2 theme extensions excluded)

[miguelsolorio]

Thanks for the feedback, please see #66223 for theming decorations in the scrollbar.