如何更改Led矩阵上的颜色

Question

你好，如果可能的话，我想帮助更改颜色，因为我只是想不通。。我有两个问题，一个是是否可以用rgb-led矩阵在arduino中制作十六进制颜色，如果可以，你会如何制作灰色。我会把我的代码贴在下面，它会显示一条红线。

#include <Adafruit_GFX.h>   // Core graphics library
#include <RGBmatrixPanel.h> // Hardware-specific library
// pinout:
#define CLK 8  
#define OE  9
#define LAT 10
#define A   A0
#define B   A1
#define C   A2
#define D   A3
RGBmatrixPanel matrix(A, B, C, D, CLK, LAT, OE, false);
void setup(){
matrix.begin();
}
void loop() {
matrix.drawPixel(10, 8, matrix.Color333(7, 0, 0));
matrix.drawPixel(11, 8, matrix.Color333(7, 0, 0));
matrix.drawPixel(12, 8, matrix.Color333(7, 0, 0));
matrix.drawPixel(13, 8, matrix.Color333(7, 0, 0));
matrix.drawPixel(14, 8, matrix.Color333(7, 0, 0));
matrix.drawPixel(15, 8, matrix.Color333(7, 0, 0));
matrix.drawPixel(16, 8, matrix.Color333(7, 0, 0));
matrix.drawPixel(17, 8, matrix.Color333(7, 0, 0));
matrix.drawPixel(18, 8, matrix.Color333(7, 0, 0));
matrix.drawPixel(19, 8, matrix.Color333(7, 0, 0));
matrix.drawPixel(20, 8, matrix.Color333(7, 0, 0));
matrix.drawPixel(21, 8, matrix.Color333(7, 0, 0));
matrix.drawPixel(22, 8, matrix.Color333(7, 0, 0));
}

Answer 1

灰色等于红色、绿色和蓝色。

matrix.drawPixel(10, 8, matrix.Color333(4, 4, 4));

请注意，（0,0,0）为黑色，（7,7,7）为白色。介于两者之间的任何值（R=G=B）都会显示灰色阴影。