Border Title Color TCSS Style Regression

[ddkasa]

The bug

Border title colors are being displayed as backgrounds instead of changing the font color in Textual 2.0.3.

1.0.0

2.0.3

MRE

from textual.app import App
from textual.widgets import Static
from textual.containers import Vertical


class BugReportApp(App[None]):
    CSS = """
    Vertical {
        border-top: panel $surface-lighten-1;
        border-title-color: yellow;
    }
    """

    def compose(self):
        with Vertical() as c:
            c.border_title = "Panel Title"
            yield Static("Content")


if __name__ == "__main__":
    BugReportApp().run()

Not 100% sure if this is an unintended change, as it might relate to #5389.

Textual Diagnostics

Versions

Name	Value
Textual	2.0.3
Rich	13.9.4

Python

Name	Value
Version	3.12.5
Implementation	CPython
Compiler	GCC 14.2.1 20240801 (Red Hat 14.2.1-1)
Executable	/home/dk/dev/tmp/textual-sandbox/.venv/bin/python3

Operating System

Name	Value
System	Linux
Release	6.12.13-100.fc40.x86_64
Version	#1 SMP PREEMPT_DYNAMIC Sat Feb 8 17:10:01 UTC 2025

Terminal

Name	Value
Terminal Application	Kitty
TERM	xterm-kitty
COLORTERM	truecolor
FORCE_COLOR	Not set
NO_COLOR	Not set

Rich Console options

Name	Value
size	width=137, height=54
legacy_windows	False
min_width	1
max_width	137
is_terminal	True
encoding	utf-8
max_height	54
justify	None
overflow	None
no_wrap	False
highlight	None
markup	None
height	None

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