Palettes / Colors / #EFE666

#EFE666 — Light Vivid Yellow

#EFE666 is a yellow color we call Light Vivid Yellow, closest to the named color Khaki (#F0E68C). It belongs to the yellow family.

Color name

Closest CSS keyword: khaki (#F0E68C) — not an exact match. CSS khaki gives you #F0E68C, a different color; use #EFE666 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.

#EFE666 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 #6770EF; it also sits naturally between #EFA267 and #B4EF67. 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 94% · Green 90% · Blue 40%

Cyan 0% · Magenta 4% · Yellow 57% · Key 6%

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

Previews

CSS code for #EFE666

.text { color: #EFE666; }
.background { background-color: #EFE666; }
.border { border: 3px solid #EFE666; }
.text-rgb { color: rgb(239, 230, 102); }
.text-hsl { color: hsl(56, 81%, 67%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #EFE666; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(239, 230, 102, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #EFE666; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(239, 230, 102, 0.8); }

HTML: <p style="color:#EFE666">Text here</p> · <div style="background-color:#EFE666">Div content here</div>

Shades of #EFE666

Tints of #EFE666

Tones of #EFE666

Color harmonies

Complementary — #6770EF:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #EFE666: #000000.

Semi-transparent (opacity) text on #EFE666

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 #EFE666 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 #EFE666 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

← #EFE665  ·  #EFE667 →

Frequently asked questions

What color is #EFE666?

#EFE666 is Light Vivid Yellow, a yellow color (RGB 239, 230, 102). Its closest standard named color is Khaki.

What is the RGB and HSL of #EFE666?

#EFE666 is RGB 239, 230, 102 — HSL 56°, 81%, 67% — CMYK 0%, 4%, 57%, 6%.

What colors go with #EFE666?

Its complement is #6770EF; analogous partners are #EFA267 and #B4EF67. It also appears in 6+ palettes in our collection.

Can I use #EFE666 for text?

Black text on #EFE666 has a contrast ratio of 16.18:1 (passes WCAG AA); white text gives 1.30:1.