# HiLo

Canonical URL: https://colorcurio.us/colormaps/vispy.HiLo
Source type: Colormap
Type: sequential
Collection: vispy
Attribution: vispy 0.x, vispy/color/colormap.py
License: BSD-3-Clause
Source: https://vispy.org/api/vispy.color.colormap.html
Tags: highlights, out-of-range-saturated
Stops: 256

## Summary

HiLo is a sequential colormap from the vispy collection. Inspect its perceptual lightness, chroma, and hue profile on colorcurio.us.

vispy preset 'HiLo' — grey ramp with blue low / red high anchors for over/under.

## Perceptual profile (OKLCh)

- Lightness: 0.452 → 0.628 (range 1.000, min 0.000, max 1.000); non-monotonic; midpoint 0.494
- Chroma: min 0.000, max 0.313, mean 0.096
- Hue: 264.1° → 29.2° (span 125.2°), path monotonic-cw; quadrants: blue, red
- Endpoint temperature: cool → warm
- Perceptual ΔE: total 185.7, mean/step 0.728, max step 1.402, smoothness 0.569, speed 0.728

## Colorblind safety (ΔE under simulated CVD)

- Protanopia: ΔE total 184.4; preserves order: no
- Deuteranopia: ΔE total 170.5; preserves order: no
- Tritanopia: ΔE total 181.3; preserves order: no

## Related

- Family: https://colorcurio.us/colormaps/families/vispy
- All colormaps: https://colorcurio.us/colormaps