Palettes / Colors / #1B1663

#1B1663 — Deep Blue

#1B1663 is a blue color we call Deep Blue, closest to the named color MidnightBlue (#191970). It belongs to the blue family.

Color name

Closest CSS keyword: midnightblue (#191970) — not an exact match. CSS midnightblue gives you #191970, a different color; use #1B1663 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.

#1B1663 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 #5F6416; it also sits naturally between #163864 and #421664. 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 11% · Green 9% · Blue 39%

Cyan 73% · Magenta 78% · Yellow 0% · Key 61%

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

Previews

CSS code for #1B1663

.text { color: #1B1663; }
.background { background-color: #1B1663; }
.border { border: 3px solid #1B1663; }
.text-rgb { color: rgb(27, 22, 99); }
.text-hsl { color: hsl(244, 64%, 24%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #1B1663; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(27, 22, 99, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #1B1663; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(27, 22, 99, 0.8); }

HTML: <p style="color:#1B1663">Text here</p> · <div style="background-color:#1B1663">Div content here</div>

Shades of #1B1663

Tints of #1B1663

Tones of #1B1663

Color harmonies

Complementary — #5F6416:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #1B1663: #FFFFFF.

Semi-transparent (opacity) text on #1B1663

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 #1B1663 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 #1B1663 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

← #1B1662  ·  #1B1664 →

Frequently asked questions

What color is #1B1663?

#1B1663 is Deep Blue, a blue color (RGB 27, 22, 99). Its closest standard named color is MidnightBlue.

What is the RGB and HSL of #1B1663?

#1B1663 is RGB 27, 22, 99 — HSL 244°, 64%, 24% — CMYK 73%, 78%, 0%, 61%.

What colors go with #1B1663?

Its complement is #5F6416; analogous partners are #163864 and #421664. It also appears in 6+ palettes in our collection.

Can I use #1B1663 for text?

White text on #1B1663 has a contrast ratio of 15.65:1 (passes WCAG AA); black text gives 1.34:1.