Hfrhyu

I am looking at just having one shading of colours for OSM roads like red. When I update the hue values to something like 10-45. I try the generate the generate_road_colours.mss file. But this usually fails with the one of the values being outside the sRGB.

I have tried changing the lightness and chroma, but I am having no joy, can anyone help?

This is the input for scripts/generate_road_colours.py

# All road classes colours will be generated for, in order of importance
# (biggest first).
roads:
 - motorway
 - trunk
 - primary
 - secondary

# The starting and ending hue. The range goes from 0 to 360, with 0 and 360
# representing red.
hue: [10, 40]

# The lightness and chroma (also known as saturation) for each type of colour.
# Lightness ranges from 0 to 100; dark to bright.
# Chroma ranges from 0 to 100 too; unsaturated to fully saturated.
classes:
 # Colours for output into the MSS file
 mss:
 fill:
 lightness: [80, 97]
 chroma: [35, 29]
 casing:
 lightness: [50, 50]
 chroma: [70, 55]
 low-zoom:
 lightness: [62, 92]
 chroma: [50, 40]
 low-zoom-casing:
 lightness: [50, 70]
 chroma: [50, 65]
 shield:
 lightness: [20, 25]
 chroma: [40, 42]
 # Colours used by the road shields script
 shield:
 fill:
 lightness: [85, 95]
 chroma: [12, 14]
 stroke_fill:
 lightness: [70, 80]
 chroma: [22, 24]

The issue is the lightness is making the red become out of the RGB range, in the fill values.

hue: [0, 45]

classes:
mss:
fill:
lightness: [62, 75]
chroma: [35, 29]
casing:
lightness: [50, 50]
chroma: [70, 55]
low-zoom:
lightness: [57, 70]
chroma: [55, 45]
low-zoom-casing:
lightness: [50, 70]
chroma: [50, 65]
shield:
lightness: [20, 25]
chroma: [40, 42]
shield:
fill:
lightness: [74, 85]
chroma: [22, 24]
stroke_fill:
lightness: [60, 70]
chroma: [27, 30]