[background] Use low contrast rules and dots in page backgrounds

src/view/background/DottedBackgroundPainter.cpp

@@ -7,8 +7,8 @@ DottedBackgroundPainter::DottedBackgroundPainter() = default;
 DottedBackgroundPainter::~DottedBackgroundPainter() = default;
 
 void DottedBackgroundPainter::resetConfig() {
-    this->foregroundColor1 = 0xBDBDBDU;
-    this->lineWidth = 1.5;
+    this->foregroundColor1 = 0x303030U;
+    this->lineWidth = 1;
     this->drawRaster1 = 10;
 }
 

src/view/background/GraphBackgroundPainter.cpp

@@ -18,11 +18,11 @@ void GraphBackgroundPainter::updateGraphColor() {
         return ((0xffU & uint32_t(color)) + (0xffU & (uint32_t(color) >> 8U)) + (0xffU & (uint32_t(color) >> 16U))) / 3;
     };
 
-    this->foregroundColor1 = greyscale(backgroundColor) < 0x80U ? 0x202020U : 0xBDBDBDU;
+    this->foregroundColor1 = greyscale(backgroundColor) < 0x80U ? 0x303030U : 0xBDBDBDU;
 }
 
 void GraphBackgroundPainter::resetConfig() {
-    this->foregroundColor1 = 0xBDBDBDU;
+    this->foregroundColor1 = 0x303030;
     this->lineWidth = 0.5;
     this->drawRaster1 = 14.17;
     this->margin1 = 0;

src/view/background/LineBackgroundPainter.cpp

@@ -7,8 +7,8 @@ LineBackgroundPainter::LineBackgroundPainter(bool verticalLine): verticalLine(ve
 LineBackgroundPainter::~LineBackgroundPainter() = default;
 
 void LineBackgroundPainter::resetConfig() {
-    this->foregroundColor1 = 0x40A0FFU;
-    this->foregroundColor2 = 0xFF0080U;
+    this->foregroundColor1 = 0x303030U; // Solarized subtle
+    this->foregroundColor2 = 0xDC322FU; //
     this->lineWidth = 0.5;
 }