#4fa9fc as text	Ratio	AA	AA large	AAA	Fix
Aaon white	2.5:1	fail	fail	fail	AA: use #0374dd as the text (4.62:1) AAA: use #0357a6 as the text (7.2:1) AA: or shift the background to #383838 (4.7:1) AAA: or shift the background to #171717 (7.18:1)
Aaon black	8.41:1	pass	pass	pass	Passes AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4fa9fc as the background.

Brands using this color

Rendersecondary · #33acff · Δ1.656

Palettes built around it

3fb950 58a6ff f778ba 0b0f14 e6edf3

Terminal

Open in tool →

Green for success, blue for links, pink for emphasis — the dark-mode developer family, tuned to sit on near-black without glare.

Technical Dark Modern

Fonts for this mood

#4fa9fc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

Technical fonts →Modern fonts →

mcpConnect your agent — build around #4fa9fc

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 #4fa9fc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4fa9fc-9cacc4-df4e4e-1f212d-e9f1f1?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