Improve legibility of blue and grey on light backgrounds

src/config.c

@@ -1,5 +1,5 @@
 // config.c (part of mintty)
-// Copyright 2008-22 Andy Koppe, 2015-2022 Thomas Wolff
+// Copyright 2008-2022 Andy Koppe, 2015-2022 Thomas Wolff
 // Based on code from PuTTY-0.60 by Simon Tatham and team.
 // Licensed under the terms of the GNU General Public License v3 or later.
 
@@ -269,18 +269,18 @@ const config default_cfg = {
     [BOLD_WHITE_I]   = RGB(0xFF, 0xFF, 0xFF)
 #else  // theme "helmholtz"
     [BLACK_I]        = { RGB(  0,   0,   0), RGB(  0,   0,   0) },
-    [RED_I]          = { RGB(212,  44,  58), RGB(167,  35,  46) },
-    [GREEN_I]        = { RGB( 28, 168,   0), RGB( 22, 132,   0) },
+    [RED_I]          = { RGB(212,  44,  58), RGB(162,  30,  41) },
+    [GREEN_I]        = { RGB( 28, 168,   0), RGB( 28, 168,   0) },
     [YELLOW_I]       = { RGB(192, 160,   0), RGB(192, 160,   0) },
-    [BLUE_I]         = { RGB( 30, 123, 216), RGB(  0,  45, 180) },
-    [MAGENTA_I]      = { RGB(177,  72, 198), RGB(138,  58, 154) },
-    [CYAN_I]         = { RGB(  0, 168, 154), RGB(  0, 132, 121) },
+    [BLUE_I]         = { RGB(  0,  93, 255), RGB(  0,  32, 192) },
+    [MAGENTA_I]      = { RGB(177,  72, 198), RGB(134,  54, 150) },
+    [CYAN_I]         = { RGB(  0, 168, 154), RGB(  0, 168, 154) },
     [WHITE_I]        = { RGB(191, 191, 191), RGB(191, 191, 191) },
-    [BOLD_BLACK_I]   = { RGB(127, 127, 127), RGB( 85,  85,  85) },
+    [BOLD_BLACK_I]   = { RGB( 96,  96,  96), RGB( 72,  72,  72) },
     [BOLD_RED_I]     = { RGB(255, 118, 118), RGB(255, 118, 118) },
     [BOLD_GREEN_I]   = { RGB(  0, 242,   0), RGB(  0, 242,   0) },
     [BOLD_YELLOW_I]  = { RGB(242, 242,   0), RGB(242, 242,   0) },
-    [BOLD_BLUE_I]    = { RGB(125, 177, 255), RGB(125, 177, 255) },
+    [BOLD_BLUE_I]    = { RGB(125, 151, 255), RGB(125, 151, 255) },
     [BOLD_MAGENTA_I] = { RGB(255, 112, 255), RGB(255, 112, 255) },
     [BOLD_CYAN_I]    = { RGB(  0, 240, 240), RGB(  0, 240, 240) },
     [BOLD_WHITE_I]   = { RGB(255, 255, 255), RGB(255, 255, 255) }

themes/helmholtz

@@ -1,9 +1,13 @@
 # "helmholtz" colour theme for mintty
 #
+# Copyright (C) 2022 Andy Koppe.
+# Licensed under the terms of the MIT License.
+#
 # The aim of this theme is to provide vibrant colours where the normal and bold
-# levels each have approximately equal brightness. Additionally, the normal
-# colours apart from yellow have darker variants for use as background colours,
-# to help legibility of light text on them.
+# levels each have approximately equal brightness, with the exception of blue,
+# which is somewhat darker than the others to aid its legibility on light
+# backgrounds. Additionally, blue, red, magenta and grey have darker variants
+# for use as background colours to help legibility of light text on them.
 #
 # To level the colours, their luminance was calculated as follows:
 # - Gamma-expand the sRGB components by dividing each by 255 and applying the
@@ -28,19 +32,19 @@
 # Of course, that is a highly subjective process ...
 
 Black=0,0,0
-Red=212,44,58;167,35,46
-Green=28,168,0;22,132,0
+Red=212,44,58;162,30,41
+Green=28,168,0
 Yellow=192,160,0
-Blue=30,123,216;0,45,180
-Magenta=177,72,198;138,58,154
-Cyan=0,168,154;0,132,121
+Blue=0,93,255;0,32,192
+Magenta=177,72,198;134,54,150
+Cyan=0,168,154
 White=191,191,191
 
-BoldBlack=127,127,127;85,85,85
+BoldBlack=96,96,96;72,72,72
 BoldRed=255,118,118
 BoldGreen=0,242,0
 BoldYellow=242,242,0
-BoldBlue=125,177,255
+BoldBlue=125,151,255
 BoldMagenta=255,112,255
 BoldCyan=0,240,240
 BoldWhite=255,255,255

themes/kohlrausch

@@ -1,5 +1,8 @@
 # "kohlrausch" colour theme for mintty
 #
+# Copyright (C) 2022 Andy Koppe.
+# Licensed under the terms of the MIT License.
+#
 # This is a variant of the "helmholtz" theme that has been designed for use
 # with a dark text colour and light background, by darkening the foreground
 # variants of the normal colours and brightening the background ones.
@@ -29,23 +32,21 @@
 ForegroundColour=0,0,0
 BackgroundColour=255,255,255
 CursorColour=0,0,0
-BoldAsColour=no
-BoldAsFont=yes
 
 Black=0,0,0
-Red=167,35,46;212,44,58
-Green=22,132,0;28,168,0
-Yellow=150,125,0;192,160,0
-Blue=0,45,180
-Magenta=138,58,154;177,72,198
-Cyan=0,132,121;0,168,154
+Red=162,30,41;212,44,58
+Green=21,126,0;28,168,0
+Yellow=144,120,0;192,160,0
+Blue=0,32,192;0,93,255
+Magenta=134,54,150;177,72,198
+Cyan=0,126,115;0,168,154
 White=191,191,191
 
-BoldBlack=64,64,64;127,127,127
+BoldBlack=96,96,96;127,127,127
 BoldRed=255,118,118
 BoldGreen=0,242,0
 BoldYellow=242,242,0
-BoldBlue=125,177,255
+BoldBlue=125,151,255
 BoldMagenta=255,112,255
 BoldCyan=0,240,240
 BoldWhite=255,255,255