Module color 

Color palette generation functions — rainbow(), heat.colors(), terrain.colors(), topo.colors(), cm.colors(), gray.colors(), hsv(), hcl(), and colorRampPalette().

Statics

__BUILTIN_REG_BUILTIN_CM_COLORS 🔒

__BUILTIN_REG_BUILTIN_COLOR_RAMP_INTERP 🔒

__BUILTIN_REG_BUILTIN_GRAY_COLORS 🔒

__BUILTIN_REG_BUILTIN_GREY 🔒

__BUILTIN_REG_BUILTIN_HCL 🔒

__BUILTIN_REG_BUILTIN_HEAT_COLORS 🔒

__BUILTIN_REG_BUILTIN_HSV 🔒

__BUILTIN_REG_BUILTIN_RAINBOW 🔒

__BUILTIN_REG_BUILTIN_TERRAIN_COLORS 🔒

__BUILTIN_REG_BUILTIN_TOPO_COLORS 🔒

__INTERP_REG_INTERP_COLOR_RAMP_PALETTE 🔒

Functions

builtin_cm_colors 🔒

Generate a cyan-magenta diverging color palette.

builtin_color_ramp_interp 🔒

Internal helper: interpolate between a vector of hex colors to produce n colors.

builtin_gray_colors 🔒

Generate a gray-scale color palette.

builtin_grey 🔒

Convert grey levels to hex color strings.

builtin_hcl 🔒

Convert HCL (Hue-Chroma-Luminance) color values to hex color strings.

builtin_heat_colors 🔒

Generate a heat map color palette (red through yellow to white).

builtin_hsv 🔒

Convert HSV color values to hex color strings.

builtin_rainbow 🔒

Generate a rainbow color palette using HSV color space.

builtin_terrain_colors 🔒

Generate a terrain color palette (green through yellow/brown to white).

builtin_topo_colors 🔒

Generate a topographic color palette (blue through green to yellow).

double_scalar 🔒

Extract a scalar f64 from an RValue, returning a default if NULL or missing.

extract_doubles 🔒

Extract a vector of doubles from named/positional arg, defaulting to a single-element vector.

extract_n 🔒

Extract n (first positional arg, required) as a non-negative integer.

hcl_to_rgb 🔒

Convert HCL (Hue in degrees, Chroma, Luminance) to RGB (each in [0,1]). Uses the CIE LCH -> Lab -> XYZ -> sRGB pipeline.

hsv_to_rgb 🔒

Convert HSV (h in [0,1], s in [0,1], v in [0,1]) to RGB (each in [0,1]).

interp_color_ramp_palette 🔒

Create a color interpolation function from a vector of colors.

parse_hex_color 🔒

Parse a hex color string like “#RRGGBB” or “#RRGGBBAA” into (r, g, b, a) with values in [0,1].

rgb_to_hex 🔒

Format (r, g, b, a) each in [0,1] as a hex color string. If alpha is 1.0, returns “#RRGGBB”; otherwise “#RRGGBBAA”.