Palettes / Colors / #100B8F

#100B8F — Vivid Blue

#100B8F is a blue color we call Vivid Blue, closest to the named color DarkBlue (#00008B). It belongs to the blue family.

Color name

Closest CSS keyword: darkblue (#00008B) — not an exact match. CSS darkblue gives you #00008B, a different color; use #100B8F 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.

#100B8F 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 #8A8E0B; it also sits naturally between #0B488E and #510B8E. 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 6% · Green 4% · Blue 56%

Cyan 89% · Magenta 92% · Yellow 0% · Key 44%

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

Previews

CSS code for #100B8F

.text { color: #100B8F; }
.background { background-color: #100B8F; }
.border { border: 3px solid #100B8F; }
.text-rgb { color: rgb(16, 11, 143); }
.text-hsl { color: hsl(242, 86%, 30%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #100B8F; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(16, 11, 143, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #100B8F; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(16, 11, 143, 0.8); }

HTML: <p style="color:#100B8F">Text here</p> · <div style="background-color:#100B8F">Div content here</div>

Shades of #100B8F

Tints of #100B8F

Tones of #100B8F

Color harmonies

Complementary — #8A8E0B:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #100B8F: #FFFFFF.

Semi-transparent (opacity) text on #100B8F

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 #100B8F 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 #100B8F 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

← #100B8E  ·  #100B90 →

Frequently asked questions

What color is #100B8F?

#100B8F is Vivid Blue, a blue color (RGB 16, 11, 143). Its closest standard named color is DarkBlue.

What is the RGB and HSL of #100B8F?

#100B8F is RGB 16, 11, 143 — HSL 242°, 86%, 30% — CMYK 89%, 92%, 0%, 44%.

What colors go with #100B8F?

Its complement is #8A8E0B; analogous partners are #0B488E and #510B8E. It also appears in 6+ palettes in our collection.

Can I use #100B8F for text?

White text on #100B8F has a contrast ratio of 14.32:1 (passes WCAG AA); black text gives 1.47:1.