refactor: use existing constant for hardcoded values

Signed-off-by: Snehil Shah <[email protected]>

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: passed
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
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  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
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  - task: lint_c_examples
    status: na
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    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
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  - task: lint_typescript_declarations
    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: Snehil-Shah

lib/node_modules/@stdlib/repl/lib/eager_evaluator.js

@@ -31,6 +31,7 @@ var replace = require( '@stdlib/string/replace' );
 var setNonEnumerableReadOnly = require( '@stdlib/utils/define-nonenumerable-read-only-property' );
 var processCommand = require( './process_command.js' );
 var compileCommand = require( './compile_command.js' );
+var ANSI_COLORS = require( './ansi_colors.js' );
 
 
 // VARIABLES //
@@ -44,6 +45,8 @@ var tempDB = {
 		'isPure': true
 	}
 };
+var ANSI_GRAY = ANSI_COLORS[ 'brightBlack' ];
+var ANSI_RESET = ANSI_COLORS[ 'reset' ];
 
 
 // MAIN //
@@ -145,7 +148,7 @@ setNonEnumerableReadOnly( EagerEvaluator.prototype, 'onKeypress', function onKey
 	}
 	cursorPosition = this._rli.cursor;
 	pre = replace( this._repl._outputPrompt, '%d', ( this._repl._count+1 ).toString() );
-	this._repl._ostream.write( '\n\u001b[90m' + pre + res + '\u001b[0m' );
+	this._repl._ostream.write( '\n' + ANSI_GRAY + pre + res + ANSI_RESET );
 	readline.moveCursor( this._repl._ostream, 0, -1 );
 	readline.cursorTo( this._repl._ostream, cursorPosition + this._repl.promptLength() );
 	this._isPreview = true;