Palettes / Colors / #1663B8

#1663B8 — Vivid Blue

#1663B8 is a blue color we call Vivid Blue, closest to the named color SteelBlue (#4682B4). It belongs to the blue family.

Color name

Closest CSS keyword: steelblue (#4682B4) — not an exact match. CSS steelblue gives you #4682B4, a different color; use #1663B8 when you need this exact shade.

Sources: common names follow widely used color-name references; CSS keywords and their hex values follow the CSS Color specification.

#1663B8 is a cool blue color associated with trust, calm and professionalism. It is saturated enough to be the accent — buttons, highlights and calls to action — while neutrals do the quiet work around it.

Its strongest partner is its complement #B76915; it also sits naturally between #15B4B7 and #1815B7. In the palettes below you can see it working alongside real color combinations from our collection.

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Color values

RGB & CMYK percentages

Red 9% · Green 39% · Blue 72%

Cyan 88% · Magenta 46% · Yellow 0% · Key 28%

CMYK values are unprofiled approximations for screen reference — not a print-proofing guarantee.

Previews

CSS code for #1663B8

.text { color: #1663B8; }
.background { background-color: #1663B8; }
.border { border: 3px solid #1663B8; }
.text-rgb { color: rgb(22, 99, 184); }
.text-hsl { color: hsl(211, 79%, 40%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #1663B8; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(22, 99, 184, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #1663B8; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(22, 99, 184, 0.8); }

HTML: <p style="color:#1663B8">Text here</p> · <div style="background-color:#1663B8">Div content here</div>

Shades of #1663B8

Tints of #1663B8

Tones of #1663B8

Color harmonies

Complementary — #B76915:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #1663B8: #FFFFFF.

Semi-transparent (opacity) text on #1663B8

Text set with opacity blends into the background, so its real contrast is lower than the solid ratios above. Choose a text color and an opacity to see the blended color and its true ratio:

How #1663B8 looks with color blindness

Simulated with standard Machado color-vision-deficiency matrices — useful when this color carries meaning in charts, maps or interfaces:

Closest design-system colors

The nearest matches in the Tailwind CSS, Material Design and Bootstrap palettes — handy when you need a framework class instead of a raw hex:

Palettes with a similar color

These palettes use a close neighbour of #1663B8 rather than the exact color:

Similar colors

The closest colors that actually appear in our palette collection — click any to open its page:

Browse neighbouring colors

← #1663B7  ·  #1663B9 →

Frequently asked questions

What color is #1663B8?

#1663B8 is Vivid Blue, a blue color (RGB 22, 99, 184). Its closest standard named color is SteelBlue.

What is the RGB and HSL of #1663B8?

#1663B8 is RGB 22, 99, 184 — HSL 211°, 79%, 40% — CMYK 88%, 46%, 0%, 28%.

What colors go with #1663B8?

Its complement is #B76915; analogous partners are #15B4B7 and #1815B7. It also appears in 6+ palettes in our collection.

Can I use #1663B8 for text?

White text on #1663B8 has a contrast ratio of 5.98:1 (passes WCAG AA); black text gives 3.51:1.