Update README.md

README.md

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-Color picker for the [hexcol minetest mod](https://gitinthebutt.ofafox.com/Bob/hexcol)
+# Color picker for hexcol mod
+Quite heavy weight color picker for [hexcol](https://gitoverit.ofafox.com/Bob/hexcol). Featuring two mapping options and four different color spaces.
+## mapping
+- Sliders: Adjust sliders to the exact value for the selected color space, click on the color preview to receive the item.
+- 2d map: A map showing a whole range of colors in the selected color space, including a slider since evey space is 3 dimensions wide.
+
+## color spaces
+- RGB: The simple direct represenation of the color, the mapping is a little different than the other spaces, with b/g on x/y and red as slider
+- HSV: Hue Saturation Value, represented in degrees, and percentage. Value being "brightness"
+- HSL: same as hsv, expect lightness instead of brightness
+- Oklab: actually OklcH, a space where lightness is not direct, rather perceived brightness, selecting a hue and chroma (similar to saturation) and sliding through brightness, should yield colors that look equally bright
+
+In the top left, the mapping can be selected with the dropdown, and the top right the color space.
+The 2d map is quite heavy on resources, hence sliders is the default selected option. A "rate limiter" is added with the option to modify the minimum interval between updates for the map int he mod settings.
+The picker is added as an inventory item, but also integrated into unified inventory as a button
+
+![screenshot](https://github.com/Mjokfox/color_picker/blob/main/Screenshot.png)