Community-maintained principles reviewed before publication and retrieved as Agent design constraints.
Chart Accessibility Encoding turns a frequent interface judgment into an executable constraint before generation.
Charts cannot rely on color alone; categories and states need text, shape, line style, or direct labels.86%Typography Color Accessibilitydark-mode / contrastDark Mode Contrast Tuning turns a frequent interface judgment into an executable constraint before generation.
Dark mode is not color inversion; text, borders, state colors, and elevation need rechecking.84%Typography Color Accessibilityaccessibility / colorState, risk, category, and selection cannot rely on color alone; text, icon, shape, or position must help.
Color semantics weaken under color blindness, low vision, printing, and poor lighting.82%Typography Color Accessibilitysurface / colorWhen surfaces change, text, borders, icons, and state colors must be recalibrated.
The same color value has different strength on different backgrounds and should not be reused mechanically.82%Typography Color Accessibilitycolor / tokensDefine color roles before values so one color does not carry too many meanings.
Primary, background, border, text, status, and accent colors need stable responsibilities.82%