Heatwave
Open in tool →Blaze orange and hot yellow with one cold blue — the high-noon palette; use the blue where the eye needs to rest.
Color
#1891fb
#1891fb
hex
#1891fbrgb
rgb(24, 145, 251)hsl
hsl(208, 97%, 54%)oklch
oklch(0.651 0.185 251.7)Closest name: dodgerblue (#1e90ff)Relative luminance 0.2741
Colors that go with #1891fb
Charcoal, Amber and 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 #1891fb: softer than #000 and cool enough to feel like part of the same palette.
Amber #ffbf00
shippedAmber is paired with #1891fb in 10 real palettes, including Heatwave and Google's brand system, as the supporting colour.
Blue #0000ff
shipped9 real palettes, including Unity's brand system and Readymag's brand system put Blue beside #1891fb, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #1891fb: 8 real palettes, including Blue Mono and Carrefour's brand system, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #1891fb in 5 real palettes, including Behance's brand system and NASCAR's brand system, as the accent.
Dark Orange #ff8c00
shippedDark Orange shows up next to #1891fb in 4 real palettes, including Playground and Elastic's brand system, as the lead colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #1891fb: 9 real palettes, including Venmo's brand system and Figma's brand system, as the supporting colour.
Dark Goldenrod #b8860b
complementaryDark Goldenrod sits directly opposite #1891fb on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Real palettes that use #1891fb
Tints & shades
Harmonies
Contrast
| #1891fb as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.24:1 | fail | pass | fail | |
Aaon black | 6.48:1 | pass | pass | fail |
|
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1891fb as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#1891fb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #1891fb
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 #1891fb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/1891fb-9cadc4-df4e51-1f212d-e9f1f1?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