Palettes / Colors / #1B445A

#1B445A — Deep Muted Blue

#1B445A is a blue color we call Deep Muted Blue, closest to the named color DarkSlateGray (#2F4F4F). It belongs to the blue family.

Color name

Closest CSS keyword: darkslategray (#2F4F4F) — not an exact match. CSS darkslategray gives you #2F4F4F, a different color; use #1B445A 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.

#1B445A is a cool blue color associated with trust, calm and professionalism. It sits comfortably in the middle: usable for large areas in soft schemes, or as a supporting color beside something stronger.

Its strongest partner is its complement #5A311B; it also sits naturally between #1B5A51 and #1B245A. 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 27% · Blue 35%

Cyan 70% · Magenta 24% · Yellow 0% · Key 65%

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

Previews

CSS code for #1B445A

.text { color: #1B445A; }
.background { background-color: #1B445A; }
.border { border: 3px solid #1B445A; }
.text-rgb { color: rgb(27, 68, 90); }
.text-hsl { color: hsl(201, 54%, 23%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #1B445A; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(27, 68, 90, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #1B445A; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(27, 68, 90, 0.8); }

HTML: <p style="color:#1B445A">Text here</p> · <div style="background-color:#1B445A">Div content here</div>

Shades of #1B445A

Tints of #1B445A

Tones of #1B445A

Color harmonies

Complementary — #5A311B:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #1B445A: #FFFFFF.

Semi-transparent (opacity) text on #1B445A

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 #1B445A 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 #1B445A 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

← #1B4459  ·  #1B445B →

Frequently asked questions

What color is #1B445A?

#1B445A is Deep Muted Blue, a blue color (RGB 27, 68, 90). Its closest standard named color is DarkSlateGray.

What is the RGB and HSL of #1B445A?

#1B445A is RGB 27, 68, 90 — HSL 201°, 54%, 23% — CMYK 70%, 24%, 0%, 65%.

What colors go with #1B445A?

Its complement is #5A311B; analogous partners are #1B5A51 and #1B245A. It also appears in 6+ palettes in our collection.

Can I use #1B445A for text?

White text on #1B445A has a contrast ratio of 10.39:1 (passes WCAG AA); black text gives 2.02:1.