Temperature Color Gradients

temp.ino

#include "map2colour.h"

uint32_t wundergroundColors[] = {
  0x00111111, 0x0021006B, 0x004C006B, 0x006B006B, 0x00990099, 0x00B300B3,
  0x00CC00CC, 0x00E600E6, 0x00FF02FF, 0x00D100FF, 0x009E01FF, 0x006600FF,
  0x001800FF, 0x00144AFF, 0x000E74FF, 0x0000A4FF, 0x0000CBFF, 0x0000E6FF,
  0x0000FFFF, 0x0001FFB3, 0x007FFF00, 0x00CEFF00, 0x00FEFF00, 0x00FFE601,
  0x00FFCB00, 0x00FFAE00, 0x00FF9900, 0x00FE7F00, 0x00FF4F00, 0x00FF0700,
  0x00FF4545, 0x00FF6968, 0x00FF8787, 0x00FF9E9E, 0x00FFB5B5, 0x00FFCFCF,
  0x00FFE8E8, 0x00EEEEEE
};
float wundergroundDomain[] = {−60,−55,−50,−45,−40,−35,−30,−25,−20,−15,−10,−5,0,5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95,100,105,110,115,120,125};

uint32_t nwsColors[] = {
  0x00ffffff, 0x00ffd2ff, 0x00df8ee2, 0x00a760c8, 0x005e4eac,
  0x0037c4e2, 0x0033de9d, 0x007ed634, 0x00ffff32, 0x00fb9232,
  0x00da4f33, 0x00b23833, 0x00000000
};
float nwsDomain[] = {−10,0,10,20,30,40,50,60,70,80,90,100,110};

uint32_t windyColors[] = {
  0x00734669, 0x00caacc3, 0x00a24691, 0x008f59a9, 0x009ddbd9,
  0x006abfb5, 0x0064a6bd, 0x005d85c6, 0x00447d63, 0x00809318,
  0x00f3b704, 0x00e85319, 0x00470e00
};
float windyDomain[] = {-94,-67,-40,-13,5,17,25,32,34,50,70,86,116};

map2colour m2c(13);  // number of temp colors in the array

void setup() {
  // m2c.begin(wundergroundDomain, wundergroundColors);  // Uncomment for wunderground scale
  // m2c.begin(nwsDomain, nwsColors);  // Uncomment for nws scale
  m2c.begin(windyDomain, windyColors);  // Default to windy.com scale
}

void loop() {
  int temp = 60; // degrees f
  uint32_t rgbColor = m2c.map2RGB(temp);
  byte r = (rgbColor >> 16) & 0xFF;
  byte g = (rgbColor >> 8) & 0xFF;
  byte b = rgbColor & 0xFF;
}

temp.js

// const tempScale = chroma.scale(["#111111","#21006B","#4C006B","#6B006B","#990099","#B300B3","#CC00CC","#E600E6","#FF02FF","#D100FF","#9E01FF","#6600FF","#1800FF","#144AFF","#0E74FF","#00A4FF","#00CBFF","#00E6FF","#00FFFF","#01FFB3","#7FFF00","#CEFF00","#FEFF00","#FFE601","#FFCB00","#FFAE00","#FF9900","#FE7F00","#FF4F00","#FF0700","#FF4545","#FF6968","#FF8787","#FF9E9E","#FFB5B5","#FFCFCF","#FFE8E8","#EEEEEE"]).domain([-60,125]).mode('hsl'); // wunderground scale
// const tempScale = chroma.scale(["#ffffff", "#ffd2ff", "#df8ee2", "#a760c8", "#5e4eac", "#37c4e2", "#33de9d", "#7ed634", "#ffff32", "#fb9232", "#da4f33", "#b23833", "#000000"]).domain([-10,110]).mode('hsl'); // nws scale
const tempScale = chroma.scale(["#734669","#caacc3","#a24691","#8f59a9","#9ddbd9","#6abfb5","#64a6bd","#5d85c6","#447d63","#809318","#f3b704","#e85319","#470e00"]).domain([[-94,-67,-40,-13,5,17,25,32,34,50,70,86,116]]).mode('hsl'); // windy.com default

let color = tempScale(60).hex(); // degrees f

temp.py

import spectra

# tempScale = spectra.scale(["#111111","#21006B","#4C006B","#6B006B","#990099","#B300B3","#CC00CC","#E600E6","#FF02FF","#D100FF","#9E01FF","#6600FF","#1800FF","#144AFF","#0E74FF","#00A4FF","#00CBFF","#00E6FF","#00FFFF","#01FFB3","#7FFF00","#CEFF00","#FEFF00","#FFE601","#FFCB00","#FFAE00","#FF9900","#FE7F00","#FF4F00","#FF0700","#FF4545","#FF6968","#FF8787","#FF9E9E","#FFB5B5","#FFCFCF","#FFE8E8","#EEEEEE"]).domain([-60,125])  # wunderground scale
# tempScale = spectra.scale(["#ffffff", "#ffd2ff", "#df8ee2", "#a760c8", "#5e4eac", "#37c4e2", "#33de9d", "#7ed634", "#ffff32", "#fb9232", "#da4f33", "#b23833", "#000000"]).domain([-10,110])  # nws scale
tempScale = spectra.scale(["#734669","#caacc3","#a24691","#8f59a9","#9ddbd9","#6abfb5","#64a6bd","#5d85c6","#447d63","#809318","#f3b704","#e85319","#470e00"]).domain([-94,-67,-40,-13,5,17,25,32,34,50,70,86,116])  # windy.com default

color = tempScale(60).hexcode  # degrees f