Palettes / Colors / #210BCB

#210BCB — Vivid Blue

#210BCB is a blue color we call Vivid Blue, closest to the named color Blue (#0000FF). It belongs to the blue family.

Color name

Closest CSS keyword: blue (#0000FF) — not an exact match. CSS blue gives you #0000FF, a different color; use #210BCB 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.

#210BCB 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 #B5CB0B; it also sits naturally between #0B55CB and #820BCB. 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 4% · Blue 80%

Cyan 84% · Magenta 95% · Yellow 0% · Key 20%

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

Previews

CSS code for #210BCB

.text { color: #210BCB; }
.background { background-color: #210BCB; }
.border { border: 3px solid #210BCB; }
.text-rgb { color: rgb(33, 11, 203); }
.text-hsl { color: hsl(247, 90%, 42%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #210BCB; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(33, 11, 203, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #210BCB; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(33, 11, 203, 0.8); }

HTML: <p style="color:#210BCB">Text here</p> · <div style="background-color:#210BCB">Div content here</div>

Shades of #210BCB

Tints of #210BCB

Tones of #210BCB

Color harmonies

Complementary — #B5CB0B:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #210BCB: #FFFFFF.

Semi-transparent (opacity) text on #210BCB

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 #210BCB 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 #210BCB 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

← #210BCA  ·  #210BCC →

Frequently asked questions

What color is #210BCB?

#210BCB is Vivid Blue, a blue color (RGB 33, 11, 203). Its closest standard named color is Blue.

What is the RGB and HSL of #210BCB?

#210BCB is RGB 33, 11, 203 — HSL 247°, 90%, 42% — CMYK 84%, 95%, 0%, 20%.

What colors go with #210BCB?

Its complement is #B5CB0B; analogous partners are #0B55CB and #820BCB. It also appears in 6+ palettes in our collection.

Can I use #210BCB for text?

White text on #210BCB has a contrast ratio of 10.63:1 (passes WCAG AA); black text gives 1.97:1.