Palettes / Colors / #21FDFF

#21FDFF — Vivid Teal

#21FDFF is a teal color we call Vivid Teal, closest to the named color Aqua (#00FFFF). It belongs to the teal family.

Color name

Closest CSS keyword: aqua (#00FFFF) — not an exact match. CSS aqua gives you #00FFFF, a different color; use #21FDFF 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.

#21FDFF is a cool teal color associated with freshness, clarity and balance. 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 #FF221F; it also sits naturally between #1FFF93 and #1F8BFF. 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 99% · Blue 100%

Cyan 87% · Magenta 1% · Yellow 0% · Key 0%

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

Previews

CSS code for #21FDFF

.text { color: #21FDFF; }
.background { background-color: #21FDFF; }
.border { border: 3px solid #21FDFF; }
.text-rgb { color: rgb(33, 253, 255); }
.text-hsl { color: hsl(181, 100%, 56%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #21FDFF; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(33, 253, 255, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #21FDFF; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(33, 253, 255, 0.8); }

HTML: <p style="color:#21FDFF">Text here</p> · <div style="background-color:#21FDFF">Div content here</div>

Shades of #21FDFF

Tints of #21FDFF

Tones of #21FDFF

Color harmonies

Complementary — #FF221F:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #21FDFF: #000000.

Semi-transparent (opacity) text on #21FDFF

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 #21FDFF 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 #21FDFF 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

← #21FDFE  ·  #21FE00 →

Frequently asked questions

What color is #21FDFF?

#21FDFF is Vivid Teal, a teal color (RGB 33, 253, 255). Its closest standard named color is Aqua.

What is the RGB and HSL of #21FDFF?

#21FDFF is RGB 33, 253, 255 — HSL 181°, 100%, 56% — CMYK 87%, 1%, 0%, 0%.

What colors go with #21FDFF?

Its complement is #FF221F; analogous partners are #1FFF93 and #1F8BFF. It also appears in 6+ palettes in our collection.

Can I use #21FDFF for text?

Black text on #21FDFF has a contrast ratio of 16.56:1 (passes WCAG AA); white text gives 1.27:1.