ANSI Grayscale Ramp (232-255) - 24 Shades of Gray

ANSI Grayscale Ramp

The grayscale ramp occupies color codes 232 through 255 in the 256-color palette, providing 24 evenly-spaced shades of gray. These are separate from the color cube and are specifically designed for grayscale output.

Grayscale Values

Each code maps to a specific gray level:

Code	RGB Value	Brightness
232	(8, 8, 8)	Darkest
233	(18, 18, 18)	Very dark
234	(28, 28, 28)
...	...
243	(118,118,118)	Mid-gray
...	...
254	(228,228,228)	Very light
255	(238,238,238)	Lightest

The formula is: RGB = 8 + (code - 232) * 10 for each channel.

Usage Examples

# Dimmed secondary text
echo -e "\033[38;5;245mSecondary information\033[0m"

# Light gray border effect
echo -e "\033[38;5;240m────────────────────\033[0m"

# Dark background panel
echo -e "\033[48;5;234m  Dark panel content  \033[0m"

Design Applications

The grayscale ramp is invaluable for creating visual hierarchy in terminal UIs:

• Code 240-245: Ideal for secondary/muted text
• Code 234-237: Great for subtle panel backgrounds
• Code 248-252: Works well for borders and dividers on dark backgrounds
• Code 232-233: Nearly invisible on dark terminals, useful for very subtle effects

Important Considerations

Note that codes 232-255 do not include pure black (0,0,0) or pure white (255,255,255). For those, use color code 0 (black) and 15 (white) from the standard palette. The grayscale ramp starts at brightness 8 and ends at 238, leaving room for the standard black and white.