Repository: spyder-ide/spyder

Issue:
White brackets in the Obsidian theme
## Description

### What steps will reproduce the problem?

<!--- You can use Markdown here --->

Hello, I use the Obsidian theme, and when I put the brackets, they turn into a white square, which a little interferes with the work.



## Versions

* Spyder version: 4.0.1 
* Python version: 3.7.6
* Qt version: 5.9.6
* PyQt5 version: 5.9.2
* Operating System: Windows 10

### Dependencies

```
atomicwrites >=1.2.0         :  1.3.0 (OK)
chardet >=2.0.0              :  3.0.4 (OK)
cloudpickle >=0.5.0          :  1.3.0 (OK)
diff_match_patch >=20181111  :  20181111 (OK)
intervaltree                 :  None (OK)
IPython >=4.0                :  7.12.0 (OK)
jedi =0.14.1                 :  0.14.1 (OK)
nbconvert >=4.0              :  5.6.1 (OK)
numpydoc >=0.6.0             :  0.9.2 (OK)
pexpect >=4.4.0              :  4.8.0 (OK)
pickleshare >=0.4            :  0.7.5 (OK)
psutil >=0.3                 :  5.6.7 (OK)
pygments >=2.0               :  2.5.2 (OK)
pylint >=0.25                :  2.4.4 (OK)
pyls >=0.31.2;<0.32.0        :  0.31.7 (OK)
zmq >=17                     :  18.1.1 (OK)
qdarkstyle >=2.7             :  2.8 (OK)
qtawesome >=0.5.7            :  0.6.1 (OK)
qtconsole >=4.6.0            :  4.6.0 (OK)
qtpy >=1.5.0                 :  1.9.0 (OK)
rtree >=0.8.3                :  0.9.3 (OK)
sphinx >=0.6.6               :  2.4.0 (OK)
spyder_kernels >=1.8.1;<2.0.0:  1.8.1 (OK)
watchdog                     :  None (OK)
cython >=0.21                :  0.29.15 (OK)
matplotlib >=2.0.0           :  3.1.3 (OK)
numpy >=1.7                  :  1.18.1 (OK)
pandas >=0.13.1              :  1.0.1 (OK)
scipy >=0.17.0               :  1.4.1 (OK)
sympy >=0.7.3                :  1.5.1 (OK)
```



Discussion:
Thanks for reporting. We'll fix this in our next release.

@juanis2112, an easy one for you.

Resolving patch:
diff --git a/spyder/config/appearance.py b/spyder/config/appearance.py
--- a/spyder/config/appearance.py
+++ b/spyder/config/appearance.py
@@ -215,7 +215,7 @@
     'solarized/dark/occurrence':  '#657b83',
     'solarized/dark/ctrlclick':   '#d33682',
     'solarized/dark/sideareas':   '#073642',
-    'solarized/dark/matched_p':   '#93a1a1',
+    'solarized/dark/matched_p':   '#566300',
     'solarized/dark/unmatched_p': '#dc322f',
     'solarized/dark/normal':     ('#839496', False, False),
     'solarized/dark/keyword':    ('#859900', False, False),
@@ -234,7 +234,7 @@
     'inkpot/occurrence':  "#616161",
     'inkpot/ctrlclick':   "#1f1f27",
     'inkpot/sideareas':   "#2d2d44",
-    'inkpot/matched_p':   "#cfbfad",
+    'inkpot/matched_p':   "#3672b5",
     'inkpot/unmatched_p': "#8b8bff",
     'inkpot/normal':     ('#cfbfad', False, False),
     'inkpot/keyword':    ('#808bed', False, False),
@@ -272,7 +272,7 @@
     'nightlion/occurrence':  "#616161",
     'nightlion/ctrlclick':   "#b3b5af",
     'nightlion/sideareas':   "#505050",
-    'nightlion/matched_p':   "#e2e2e2",
+    'nightlion/matched_p':   "#3672b5",
     'nightlion/unmatched_p': "#364656",
     'nightlion/normal':     ('#e2e2e2', False, False),
     'nightlion/keyword':    ('#8dcbe2', False, False),
@@ -310,11 +310,11 @@
     'oblivion/occurrence':  "#000000",
     'oblivion/ctrlclick':   "#ccdf32",
     'oblivion/sideareas':   "#2a2a2a",
-    'oblivion/matched_p':   "#d8d8d8",
+    'oblivion/matched_p':   "#de7878",
     'oblivion/unmatched_p': "#000000",
     'oblivion/normal':     ('#d8d8d8', False, False),
     'oblivion/keyword':    ('#ffffff', False, False),
-    'oblivion/builtin':    ('#d25252', False, False),
+    'oblivion/builtin':    ('#de7878', False, False),
     'oblivion/definition': ('#ffffff', False, False),
     'oblivion/comment':    ('#c7dd0c', False, False),
     'oblivion/string':     ('#ffc600', False, False),
@@ -329,7 +329,7 @@
     'obsidian/occurrence':  "#616161",
     'obsidian/ctrlclick':   "#7d8c93",
     'obsidian/sideareas':   "#2f393c",
-    'obsidian/matched_p':   "#e0e2e4",
+    'obsidian/matched_p':   "#3672b5",
     'obsidian/unmatched_p': "#804000",
     'obsidian/normal':     ('#e0e2e4', False, False),
     'obsidian/keyword':    ('#93c763', False, False),
@@ -348,7 +348,7 @@
     'pastel/occurrence':  "#616161",
     'pastel/ctrlclick':   "#7d8c93",
     'pastel/sideareas':   "#2f393c",
-    'pastel/matched_p':   "#e0e2e4",
+    'pastel/matched_p':   "#3672b5",
     'pastel/unmatched_p': "#95bed8",
     'pastel/normal':     ('#e0e2e4', False, False),
     'pastel/keyword':    ('#a57b61', False, False),
@@ -367,7 +367,7 @@
     'retta/occurrence':  "#5e5c56",
     'retta/ctrlclick':   "#83786e",
     'retta/sideareas':   "#2a2a2a",
-    'retta/matched_p':   "#f8e1aa",
+    'retta/matched_p':   "#de7878",
     'retta/unmatched_p': "#527d5d",
     'retta/normal':     ('#f8e1aa', False, False),
     'retta/keyword':    ('#e79e3c', True, False),
@@ -405,7 +405,7 @@
     'sublime-monokai/extended/occurrence':  "#000000",
     'sublime-monokai/extended/ctrlclick':   "#ffffff",
     'sublime-monokai/extended/sideareas':   "#2f2f2f",
-    'sublime-monokai/extended/matched_p':   "#cfbfad",
+    'sublime-monokai/extended/matched_p':   "#679116",
     'sublime-monokai/extended/unmatched_p': "#cc9900",
     'sublime-monokai/extended/normal':     ('#cfbfad', False, False),
     'sublime-monokai/extended/keyword':    ('#ff007f', False, False),
@@ -424,7 +424,7 @@
     'vibrant-ink/occurrence':  "#616161",
     'vibrant-ink/ctrlclick':   "#8c3fc8",
     'vibrant-ink/sideareas':   "#222220",
-    'vibrant-ink/matched_p':   "#ffffff",
+    'vibrant-ink/matched_p':   "#598c19",
     'vibrant-ink/unmatched_p': "#414c3b",
     'vibrant-ink/normal':     ('#ffffff', False, False),
     'vibrant-ink/keyword':    ('#ec691e', False, False),
diff --git a/spyder/config/main.py b/spyder/config/main.py
--- a/spyder/config/main.py
+++ b/spyder/config/main.py
@@ -625,4 +625,4 @@
 #    or if you want to *rename* options, then you need to do a MAJOR update in
 #    version, e.g. from 3.0.0 to 4.0.0
 # 3. You don't need to touch this value if you're just adding a new option
-CONF_VERSION = '57.0.0'
+CONF_VERSION = '57.1.0'


Test patch: