Palettes / Colors / #37101A

#37101A — Dark Red

#37101A is a red color we call Dark Red, closest to the named color Black (#000000). It belongs to the red family.

Color name

Closest CSS keyword: black (#000000) — not an exact match. CSS black gives you #000000, a different color; use #37101A 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.

#37101A is a warm red color associated with energy, passion and urgency. 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 #10372E; it also sits naturally between #37102E and #371A10. 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 22% · Green 6% · Blue 10%

Cyan 0% · Magenta 71% · Yellow 53% · Key 78%

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

Previews

CSS code for #37101A

.text { color: #37101A; }
.background { background-color: #37101A; }
.border { border: 3px solid #37101A; }
.text-rgb { color: rgb(55, 16, 26); }
.text-hsl { color: hsl(345, 55%, 14%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #37101A; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(55, 16, 26, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #37101A; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(55, 16, 26, 0.8); }

HTML: <p style="color:#37101A">Text here</p> · <div style="background-color:#37101A">Div content here</div>

Shades of #37101A

Tints of #37101A

Tones of #37101A

Color harmonies

Complementary — #10372E:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #37101A: #FFFFFF.

Semi-transparent (opacity) text on #37101A

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 #37101A 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 #37101A 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

← #371019  ·  #37101B →

Frequently asked questions

What color is #37101A?

#37101A is Dark Red, a red color (RGB 55, 16, 26). Its closest standard named color is Black.

What is the RGB and HSL of #37101A?

#37101A is RGB 55, 16, 26 — HSL 345°, 55%, 14% — CMYK 0%, 71%, 53%, 78%.

What colors go with #37101A?

Its complement is #10372E; analogous partners are #37102E and #371A10. It also appears in 6+ palettes in our collection.

Can I use #37101A for text?

White text on #37101A has a contrast ratio of 16.78:1 (passes WCAG AA); black text gives 1.25:1.