Palettes / Colors / #213945

#213945 — Deep Muted Blue

#213945 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 #213945 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.

#213945 is a cool blue color associated with trust, calm and professionalism. It is deep enough for text, outlines and dark interface surfaces, and makes light colors glow next to it.

Its strongest partner is its complement #452D21; it also sits naturally between #21453F and #212745. 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 13% · Green 22% · Blue 27%

Cyan 52% · Magenta 17% · Yellow 0% · Key 73%

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

Previews

CSS code for #213945

.text { color: #213945; }
.background { background-color: #213945; }
.border { border: 3px solid #213945; }
.text-rgb { color: rgb(33, 57, 69); }
.text-hsl { color: hsl(200, 35%, 20%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #213945; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(33, 57, 69, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #213945; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(33, 57, 69, 0.8); }

HTML: <p style="color:#213945">Text here</p> · <div style="background-color:#213945">Div content here</div>

Shades of #213945

Tints of #213945

Tones of #213945

Color harmonies

Complementary — #452D21:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #213945: #FFFFFF.

Semi-transparent (opacity) text on #213945

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 #213945 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 #213945 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

← #213944  ·  #213946 →

Frequently asked questions

What color is #213945?

#213945 is Deep Muted Blue, a blue color (RGB 33, 57, 69). Its closest standard named color is DarkSlateGray.

What is the RGB and HSL of #213945?

#213945 is RGB 33, 57, 69 — HSL 200°, 35%, 20% — CMYK 52%, 17%, 0%, 73%.

What colors go with #213945?

Its complement is #452D21; analogous partners are #21453F and #212745. It also appears in 6+ palettes in our collection.

Can I use #213945 for text?

White text on #213945 has a contrast ratio of 12.10:1 (passes WCAG AA); black text gives 1.74:1.