HSVPaletteTest.ino

#include "FastLED.h"
#include <stdio.h>

const uint8_t ledPin = 2;

//37 + (18 * 2) + (14 * 4)
const uint16_t kNumLeds = 129;

CRGB leds[kNumLeds];

CHSVPalette16 RainbowColorsHSV_p = (
  CHSV(HUE_RED, 255, 255),  
  CHSV(HUE_ORANGE, 255, 255),  
  CHSV(HUE_YELLOW, 255, 255),  
  CHSV(HUE_GREEN, 255, 255),  
  CHSV(HUE_AQUA, 255, 255),  
  CHSV(HUE_BLUE, 255, 255),  
  CHSV(HUE_PURPLE, 255, 255),  
  CHSV(HUE_PINK, 255, 255)
);

CHSVPalette16 currentPalette = RainbowColorsHSV_p;
uint8_t paletteIndex = 0;

void setup() {
  delay(2000);

  Serial.begin(115200);

  FastLED.addLeds<WS2812, ledPin, GRB>(leds, kNumLeds);
  FastLED.setBrightness(128);
}

void loop() {
  CHSV color = ColorFromPalette(currentPalette, paletteIndex++);
  Serial.print(paletteIndex); Serial.print(" ");     
  Serial.print(color.h); Serial.print(" ");   
  Serial.print(color.s); Serial.print(" ");
  Serial.print(color.v); Serial.print(" ");  
  Serial.println();
  fill_solid(leds, kNumLeds, color);
  LEDS.show();
}