diff --git a/README.md b/README.md
index 03b9f5c..211c0db 100644
--- a/README.md
+++ b/README.md
@@ -352,7 +352,7 @@ are either `audacity`, which generates a blue waveform on a grey background,
 similar to Audacity, or `audition`, which generates a green waveform on a
 dark background, similar to Adobe Audition.
 
-#### `--border-color`, `-c <rrggbb[aa]>`
+#### `--border-color <rrggbb[aa]>`
 
 When creating a waveform image, specifies the border color. If not given,
 the default color used is controlled by the `--colors` option.
@@ -360,17 +360,17 @@ the default color used is controlled by the `--colors` option.
 The color value should include two hexadecimal digits for each of red, green,
 and blue (00 to FF), and optional alpha transparency (00 to FF).
 
-#### `--background-color`, `-c <rrggbb[aa]>`
+#### `--background-color <rrggbb[aa]>`
 
 When creating a waveform image, specifies the background color. If not given,
 the default color used is controlled by the `--colors` option.
 
-#### `--waveform-color`, `-c <rrggbb[aa]>`
+#### `--waveform-color <rrggbb[aa]>`
 
 When creating a waveform image, specifies the waveform color. If not given,
 the default color used is controlled by the `--colors` option.
 
-#### `--axis-label-color`, `-c <rrggbb[aa]>`
+#### `--axis-label-color <rrggbb[aa]>`
 
 When creating a waveform image, specifies the axis labels color. If not given,
 the default color used is controlled by the `--colors` option.
diff --git a/doc/audiowaveform.1 b/doc/audiowaveform.1
index acbf7fe..70dc144 100644
--- a/doc/audiowaveform.1
+++ b/doc/audiowaveform.1
@@ -1,4 +1,4 @@
-.TH audiowaveform 1 "2 May 2022"
+.TH audiowaveform 1 "18 May 2022"
 
 .SH NAME
 
@@ -139,7 +139,7 @@ similar to Audacity, or \fBaudition\fR, which generates a green waveform on a
 dark background, similar to Adobe Audition.
 
 .TP
-.B --border-color\fR, \fB-c\fR <rrggbb[aa]>
+.B --border-color <rrggbb[aa]>
 When creating a waveform image, specifies the border color. If not given,
 the default color used is controlled by the \fB--colors\fR option.
 
@@ -147,17 +147,17 @@ The color value should include two hexadecimal digits for each of red, green,
 and blue (00 to FF), and optional alpha transparency (00 to FF).
 
 .TP
-.B --background-color\fR, \fB-c\fR <rrggbb[aa]>
+.B --background-color <rrggbb[aa]>
 When creating a waveform image, specifies the background color. If not given,
 the default color used is controlled by the \fB--colors\fR option.
 
 .TP
-.B --waveform-color\fR, \fB-c\fR <rrggbb[aa]>
+.B --waveform-color <rrggbb[aa]>
 When creating a waveform image, specifies the waveform color. If not given,
 the default color used is controlled by the \fB--colors\fR option.
 
 .TP
-.B --axis-label-color\fR, \fB-c\fR <rrggbb[aa]>
+.B --axis-label-color <rrggbb[aa]>
 When creating a waveform image, specifies the axis labels color. If not given,
 the default color used is controlled by the \fB--colors\fR option.