Color
#15d5ef
#15d5efrgb(21, 213, 239)hsl(187, 87%, 51%)oklch(0.801 0.137 210.5)Colors that go with #15d5ef
Charcoal, Crimson and Dodger Blue 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 #15d5ef: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
shippedCrimson is paired with #15d5ef in 4 real palettes, including Riot Games's brand system and Tiffany & Co.'s brand system, as the supporting colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #15d5ef: 5 real palettes, including Patreon's brand system and Opensea's brand system, as the accent.
Steel Blue #4682b4
shippedDesigners have shipped Steel Blue with #15d5ef: 4 real palettes, including Glacier and Astro's brand system, as the lead colour.
Taupe #483c32
shippedTaupe is paired with #15d5ef in 9 real palettes, including Crayon Box and Boeing's brand system, as the text colour against it.
Salmon #fa8072
complementarySalmon sits directly opposite #15d5ef on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Dark Orange #ff8c00
split-complementshippedDark Orange is a split-complement of #15d5ef: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Light Coral #f08080
split-complementshippedLight Coral is a split-complement of #15d5ef: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #15d5ef
Tints & shades
Harmonies
Contrast
| #15d5ef as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.78:1 | fail | fail | fail | |
Aaon black | 11.8:1 | 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 #15d5ef as the background.
Brands using this color
Fonts for this mood
#15d5ef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
Point 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.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #15d5ef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/15d5ef-a2b8be-df4e83-1f262d-e9f1ee?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