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.
Color
#66a9fa
#66a9fa
hex
#66a9fargb
rgb(102, 169, 250)hsl
hsl(213, 94%, 69%)oklch
oklch(0.725 0.137 254.1)Closest name: Fennel Flower (#77aaff)Relative luminance 0.381
Colors that go with #66a9fa
Charcoal, Goldenrod and Amber lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #66a9fa: softer than #000 and cool enough to feel like part of the same palette.
Goldenrod #daa520
complementaryshippedGoldenrod sits directly opposite #66a9fa on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Amber #ffbf00
shippedAmber is paired with #66a9fa in 7 real palettes, including NBA's brand system and Salesforce's brand system, as the lead colour.
Blue #0000ff
shipped5 real palettes, including Canva's brand system and Spotify's brand system put Blue beside #66a9fa, as the accent.
Dark Orange #ff8c00
shippedDark Orange shows up next to #66a9fa in 5 real palettes, including Learning App and Ahrefs's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #66a9fa: 7 real palettes, including Venmo's brand system and Coca-Cola's brand system, as the accent.
Gold #ffd700
shippedGold shows up next to #66a9fa in 4 real palettes, including Prime Video's brand system and Miro's brand system, as the lead colour.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #66a9fa in 4 real palettes, including Terminal and Spotify's brand system, as the lead colour.
Real palettes that use #66a9fa
Tints & shades
Harmonies
Contrast
| #66a9fa as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.44:1 | fail | fail | fail | |
Aaon black | 8.62:1 | 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 #66a9fa as the background.
Brands using this color
Palettes built around it
Blue Mono
Open in tool →One blue at four lightnesses — monochromatic in the colour-theory sense; the deep step is the text, the pale step the surface tint.
Fonts for this mood
#66a9fa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #66a9fa
live endpointPoint any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #66a9fa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/66a9fa-9ca9c4-df584e-1f202d-e9f0f1?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md