Tips for INKTOBER

http://theetheringtonbrothers.blogspot.com/2019/09/thinktober-massive-free-resource-of.html?m=1

Inktober 2019

Color theory

ISAAC NEWTON 

7 parts color wheel

ALBERT MUNSELL

10 part color wheel 

JOHAN WOLFGANG VON GOETHE

2 inverted triangles

PAUL KLEE

Three half-moon shaped areas

JOHAN L. LAMBERT

Triangular based pyramid

OTTO RUNGE 

Sphere

WILHELM OSTWALD 

Pyramid

ALFRED HICKETIER

Cube

Texture

The dot and the line: a romance lower in mathematics