Coastal
Open in tool →Sea-teal, sky and sand — bright without shouting; works for travel, wellness, and anything near water.
Color
#90c3df
#90c3df
hex
#90c3dfrgb
rgb(144, 195, 223)hsl
hsl(201, 55%, 72%)oklch
oklch(0.791 0.067 232.7)Closest name: Dolphin (#86c4da)Relative luminance 0.5029
Colors that go with #90c3df
Charcoal, Dark Salmon and Crimson 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 #90c3df: softer than #000 and cool enough to feel like part of the same palette.
Dark Salmon #e9967a
complementaryshippedDark Salmon sits directly opposite #90c3df on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Crimson #dc143c
shippedCrimson is paired with #90c3df in 5 real palettes, including Tiffany & Co.'s brand system and Frost & Ember, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #90c3df: 5 real palettes, including UEFA's brand system and Coca-Cola's brand system, as the accent.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #90c3df: 4 real palettes, including Opensea's brand system and Patreon's brand system, as the lead colour.
Midnight Blue #191970
shipped7 real palettes, including Telehealth and Lavender Milk put Midnight Blue beside #90c3df, as the text colour against it.
Royal Blue #4169e1
shippedRoyal Blue is paired with #90c3df in 6 real palettes, including Telehealth and 1password's brand system, as the lead colour.
Slate Gray #708090
shipped9 real palettes, including Still Water and Dusty Blue put Slate Gray beside #90c3df, as the lead colour.
Real palettes that use #90c3df
Tints & shades
Harmonies
Contrast
| #90c3df as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.9:1 | fail | fail | fail | |
Aaon black | 11.06:1 | 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 #90c3df as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#90c3df reads as cool, light, clean. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #90c3df
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 #90c3df and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/90c3df-9cb1c4-df4e62-1f222d-e9f1f0?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