Palettes / Colors / #666100

#666100 — Deep Vivid Yellow

#666100 is a yellow color we call Deep Vivid Yellow, closest to the named color Olive (#808000). It belongs to the yellow family.

Color name

Closest CSS keyword: olive (#808000) — not an exact match. CSS olive gives you #808000, a different color; use #666100 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.

#666100 is a warm yellow color associated with optimism, attention and cheer. It is deep enough for text, outlines and dark interface surfaces, and makes light colors glow next to it.

Its strongest partner is its complement #000566; it also sits naturally between #662E00 and #386600. 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 40% · Green 38% · Blue 0%

Cyan 0% · Magenta 5% · Yellow 100% · Key 60%

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

Previews

CSS code for #666100

.text { color: #666100; }
.background { background-color: #666100; }
.border { border: 3px solid #666100; }
.text-rgb { color: rgb(102, 97, 0); }
.text-hsl { color: hsl(57, 100%, 20%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #666100; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(102, 97, 0, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #666100; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(102, 97, 0, 0.8); }

HTML: <p style="color:#666100">Text here</p> · <div style="background-color:#666100">Div content here</div>

Shades of #666100

Tints of #666100

Tones of #666100

Color harmonies

Complementary — #000566:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #666100: #FFFFFF.

Semi-transparent (opacity) text on #666100

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 #666100 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 #666100 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

← #6660FF  ·  #666101 →

Frequently asked questions

What color is #666100?

#666100 is Deep Vivid Yellow, a yellow color (RGB 102, 97, 0). Its closest standard named color is Olive.

What is the RGB and HSL of #666100?

#666100 is RGB 102, 97, 0 — HSL 57°, 100%, 20% — CMYK 0%, 5%, 100%, 60%.

What colors go with #666100?

Its complement is #000566; analogous partners are #662E00 and #386600. It also appears in 6+ palettes in our collection.

Can I use #666100 for text?

White text on #666100 has a contrast ratio of 6.41:1 (passes WCAG AA); black text gives 3.27:1.