#42a4fa as text	Ratio	AA	AA large	AAA	Fix
Aaon white	2.65:1	fail	fail	fail	AA: use #0575d6 as the text (4.64:1) AAA: use #0459a4 as the text (7.07:1) AA: or shift the background to #363636 (4.56:1) AAA: or shift the background to #121212 (7.07:1)
Aaon black	7.92:1	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 #42a4fa as the background.

Brands using this color

JetBrainssecondary · #18a3fa · Δ1.891

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

#42a4fa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

Technical fonts →Modern fonts →

mcpConnect your agent — build around #42a4fa

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 #42a4fa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/42a4fa-9cadc4-df4e51-1f212d-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