#1b1623 as text	Ratio	AA	AA large	AAA	Fix
Aaon white	17.71:1	pass	pass	pass	Passes AAA — no fix needed.
Aaon black	1.19:1	fail	fail	fail	AA: use #816ca3 as the text (4.61:1) AAA: use #9e8eb8 as the text (7.02:1) AA: or shift the background to #828282 (4.61:1) AAA: or shift the background to #a3a3a3 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b1623 as the background.

Brands using this color

Palettes built around it

4f46e5 6b7280 10b981 ffffff 111827

Indigo SaaS

Open in tool →

The dependable indigo-and-emerald B2B pairing: indigo for primary actions, emerald reserved for success states.

Modern Cool CleanSaas

1e40af 111827 fb7185 ffffff

Cobalt Pop

Open in tool →

One deep cobalt and one hot pink on white — a two-accent system for launches and campaign pages that need punch.

Bold Cool Vivid Modern

Fonts for this mood

#1b1623 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

Luxury fonts →Bold fonts →

mcpConnect your agent — build around #1b1623

live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp

claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp

try this prompt

›analyze #1b1623 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b1623-b09cc4-dfd04e-2b1f2d-e9eaf1?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md