Fix mismatched fallback text colour on the initials badge/button

The initials badge and reset button hardcoded two independent
fallback literals -- a background (#ec4899 / #0ea5e9) and a text
colour (#ffffff) -- that were only ever chosen together for a club's
own colour via Club._content_color_for. #ffffff on #ec4899 or
#0ea5e9 actually contrasts worse than black by the same WCAG formula
the app already uses elsewhere (verified: 6.4:1 vs 3.3:1, and 7.6:1
vs 2.8:1). Added a contrast_color filter so the text colour is always
derived from whatever background hex is actually in play -- real
club colour or fallback alike -- instead of a second, independently
guessed literal that can silently drift out of sync with the first.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
2026-08-12 09:50:07 +02:00
parent 9901a90266
commit 67841491a6
7 changed files with 72 additions and 4 deletions

View File

@@ -23,7 +23,7 @@
{% else %}
<table role="presentation" cellpadding="0" cellspacing="0" border="0" width="48" style="width:48px;">
<tr>
<td align="center" valign="middle" width="48" height="48" bgcolor="{{ club.secondary_color|default:"#ec4899" }}" style="width:48px; height:48px; border-radius:24px; background-color:{{ club.secondary_color|default:"#ec4899" }}; color:{{ club.secondary_content_color|default:"#ffffff" }}; font-family: Arial, Helvetica, sans-serif; font-size:16px; font-weight:bold;">
<td align="center" valign="middle" width="48" height="48" bgcolor="{{ club.secondary_color|default:"#ec4899" }}" style="width:48px; height:48px; border-radius:24px; background-color:{{ club.secondary_color|default:"#ec4899" }}; color:{{ club.secondary_color|default:"#ec4899"|contrast_color }}; font-family: Arial, Helvetica, sans-serif; font-size:16px; font-weight:bold;">
{{ club.initials }}
</td>
</tr>
@@ -43,7 +43,7 @@
<p style="margin:0 0 20px 0;">{% blocktrans with club=club.name child=child %}{{ club }} has confirmed that you're {{ child }}'s parent or guardian, and your account is ready.{% endblocktrans %}</p>
{% trans "Set your password" as set_password_label %}
{% include "email/_button.html" with href=set_password_url label=set_password_label bg=club.primary_color|default:"#4f46e5" fg=club.primary_content_color|default:"#ffffff" %}
{% include "email/_button.html" with href=set_password_url label=set_password_label bg=club.primary_color|default:"#4f46e5" fg=club.primary_color|default:"#4f46e5"|contrast_color %}
<p style="margin:0 0 16px 0; font-size:13px; color:#6b7280;">{% trans "That link is for you alone — please don't forward it." %}</p>