Palettes / Colors / #CFEC11

#CFEC11 — Vivid Yellow

#CFEC11 is a yellow color we call Vivid Yellow, closest to the named color GreenYellow (#ADFF2F). It belongs to the yellow family.

Color name

Closest CSS keyword: greenyellow (#ADFF2F) — not an exact match. CSS greenyellow gives you #ADFF2F, a different color; use #CFEC11 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.

#CFEC11 is a warm yellow color associated with optimism, attention and cheer. 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 #2E11EE; it also sits naturally between #EE9D11 and #62EE11. In the palettes below you can see it working alongside real color combinations from our collection.

Copy HEX Copy RGB Copy HSL Download PNG swatch SVG

Color values

RGB & CMYK percentages

Red 81% · Green 93% · Blue 7%

Cyan 12% · Magenta 0% · Yellow 93% · Key 7%

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

Previews

CSS code for #CFEC11

.text { color: #CFEC11; }
.background { background-color: #CFEC11; }
.border { border: 3px solid #CFEC11; }
.text-rgb { color: rgb(207, 236, 17); }
.text-hsl { color: hsl(68, 87%, 50%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #CFEC11; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(207, 236, 17, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #CFEC11; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(207, 236, 17, 0.8); }

HTML: <p style="color:#CFEC11">Text here</p> · <div style="background-color:#CFEC11">Div content here</div>

Shades of #CFEC11

Tints of #CFEC11

Tones of #CFEC11

Color harmonies

Complementary — #2E11EE:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #CFEC11: #000000.

Semi-transparent (opacity) text on #CFEC11

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 #CFEC11 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 #CFEC11 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

← #CFEC10  ·  #CFEC12 →

Frequently asked questions

What color is #CFEC11?

#CFEC11 is Vivid Yellow, a yellow color (RGB 207, 236, 17). Its closest standard named color is GreenYellow.

What is the RGB and HSL of #CFEC11?

#CFEC11 is RGB 207, 236, 17 — HSL 68°, 87%, 50% — CMYK 12%, 0%, 93%, 7%.

What colors go with #CFEC11?

Its complement is #2E11EE; analogous partners are #EE9D11 and #62EE11. It also appears in 6+ palettes in our collection.

Can I use #CFEC11 for text?

Black text on #CFEC11 has a contrast ratio of 15.66:1 (passes WCAG AA); white text gives 1.34:1.