#0b66ef as text	Ratio	AA	AA large	AAA	Fix
Aaon white	5.05:1	pass	pass	fail	AAA: use #0951be as the text (7.16:1)
Aaon black	4.16:1	fail	pass	fail	AA: use #156ef4 as the text (4.57:1) AAA: use #5596f7 as the text (7.09:1) AA: or shift the background to #f2f2f2 (4.51:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0b66ef as the background.

Brands using this color

Palettes built around it

2563eb 52525b 16a34a fafafa 18181b

Console Light

Open in tool →

A sober docs palette: one blue for interactive, one green for success, zinc greys for everything else.

Technical Clean Light

0f172a 64748b 2563eb f8fafc

Slate Workspace

Open in tool →

Slate on slate with a single blue — the productivity-app look where the interface disappears behind the work.

Minimal Cool Clean ModernSaas

2563eb 93c5fd 16a34a ffffff 14213d

Telehealth

Open in tool →

Friendly blue with a soft tint and a green all-clear — approachable care with a tech backbone.

Modern Cool FriendlyHealth

Fonts for this mood

#0b66ef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

Technical fonts →Modern fonts →

mcpConnect your agent — build around #0b66ef

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 #0b66ef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0b66ef-9ca7c4-df5f4e-201f2d-e9f0f1?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