palantir/blueprint

`TEXT_MUTED` no longer works on heading components (and maybe other)

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#5351 opened on Jun 3, 2022

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P3Package: coreType: bughelp wanted

Description

This worked fine with v3 and v4 alpha/beta, looks like something broke after moving to full version of v4.

<H4 className={Classes.TEXT_MUTED}>Header</H4>

Environment

  • Package version(s): v4
  • Browser name and version: Safari, Chrome

Actual behavior

TEXT_MUTED css is not applied, text color is black.

image

Expected behavior

Text should have the muted color.

Contributor guide

Tech stack
reacttypescriptcss
Domain
frontend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
basic CSSReact component structure
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75
Research direction
Investigate how the CSS class `TEXT MUTED` is defined and applied in Blueprint v4. Compare the implementation with v3 to identify the regression. Look at the heading component's styling logic and check if any CSS specificity issues or missing imports cause the class not to apply. The relevant file is likely `src/blueprint.css` or the component's style module. If needed, test with a minimal example to replicate the issue.