diff --git a/src/con_duct/suite/ls.py b/src/con_duct/suite/ls.py
index fba7cdd..9d6316c 100644
--- a/src/con_duct/suite/ls.py
+++ b/src/con_duct/suite/ls.py
@@ -7,12 +7,10 @@
 import yaml
 from con_duct.__main__ import DUCT_OUTPUT_PREFIX, SummaryFormatter
 
-LS_SUMMARY_FORMAT = {
-    "prefix": "Prefix: {value}",
-    "command": "\tCommand: {value}",
-    "exit_code": "\tExit Code {value!E}",
-    "wall_clock_time": "\tWall Clock Time: {value:.3f} sec",
-    "peak_rss": "\tMemory Peak Usage (RSS): {value!S}",
+VALUE_TRANSFORMATION_MAP = {
+    "exit_code": "{value!E}",
+    "wall_clock_time": "{value:.3f} sec",
+    "peak_rss": "{value!S}",
 }
 
 
@@ -24,6 +22,18 @@ def load_duct_runs(info_files: List[str]) -> List[dict]:
     return loaded
 
 
+def process_run_data(
+    run_data_list: List[str], fields: List[str], formatter
+) -> List[OrderedDict]:
+    output_rows = []
+    for row in run_data_list:
+        flattened = _flatten_dict(row)
+        restricted = _restrict_row(fields, flattened)
+        formatted = _format_row(restricted, formatter)
+        output_rows.append(formatted)
+    return output_rows
+
+
 def _flatten_dict(d, parent_key="", sep="."):
     """Flatten a nested dictionary, creating keys as dot-separated paths."""
     items = []
@@ -45,21 +55,20 @@ def _restrict_row(field_list, row):
     return restricted
 
 
+def _format_row(row, formatter):
+    transformed = OrderedDict()
+    for col, value in row.items():
+        if transformation := VALUE_TRANSFORMATION_MAP.get(col):
+            value = formatter.format(transformation, value=value)
+        transformed[col] = value
+    return transformed
+
+
 def pyout_ls(run_data_list):
     # Generate Tabular table to output
     table = pyout.Tabular(
         style=dict(
             header_=dict(bold=True, transform=str.upper),
-            # Default styling could be provided from some collection of styling files
-            default_=dict(
-                color=dict(
-                    lookup={
-                        "Trix": "green",
-                        "110": "red",
-                        "100": "green",  # since no grey for now
-                    }
-                )
-            ),
         ),
     )
     for row in run_data_list:
@@ -71,17 +80,16 @@ def pyout_ls(run_data_list):
 def ls(args: argparse.Namespace) -> int:
     pattern = f"{DUCT_OUTPUT_PREFIX[:DUCT_OUTPUT_PREFIX.index('{')]}*_info.json"
     info_files = glob.glob(pattern)
-    run_data_list = load_duct_runs(info_files)
-    output_rows = []
-    for row in run_data_list:
-        flattened = _flatten_dict(row)
-        output_rows.append(_restrict_row(args.fields, flattened))
+    run_data_raw = load_duct_runs(info_files)
+    formatter = SummaryFormatter(enable_colors=args.colors)
+    output_rows = process_run_data(run_data_raw, args.fields, formatter)
 
     if args.format == "summaries":
-        formatter = SummaryFormatter()  # TODO enable_colors=self.colors)
         for row in output_rows:
             for col, value in row.items():
-                print(formatter.format(LS_SUMMARY_FORMAT[col], value=value))
+                if not col == "prefix":
+                    col = f"\t{col}"
+                print(f"{col.replace('_', ' ').title()}: {value}")
     elif args.format == "pyout":
         pyout_ls(output_rows)
     elif args.format == "json":
diff --git a/src/con_duct/suite/main.py b/src/con_duct/suite/main.py
index 0622113..830bb17 100644
--- a/src/con_duct/suite/main.py
+++ b/src/con_duct/suite/main.py
@@ -1,4 +1,5 @@
 import argparse
+import os
 import sys
 from typing import List, Optional
 from con_duct.suite.ls import ls
@@ -69,6 +70,12 @@ def main(argv: Optional[List[str]] = None) -> None:
             "execution_summary.peak_rss",
         ],
     )
+    parser_ls.add_argument(
+        "--colors",
+        action="store_true",
+        default=os.getenv("DUCT_COLORS", False),
+        help="Use colors in duct output.",
+    )
     parser_ls.set_defaults(func=ls)
 
     args = parser.parse_args(argv)