Onsen
Also known as: Jittery Jade , Light Turquoise , Iridescent Turquoise , Ineffable Green
A vivid green with a calm and balanced character, Onsen works well for finance apps and outdoor gear. Its complement lands in pink territory, which makes for striking two-color pairings. Accessibility-wise, it needs a dark backdrop: 14.51:1 on black clears AA.
Reference
Onsen color codes
- HEX
- #66EEBB
- RGB
- rgb(102, 238, 187)
- RGBA
- rgba(102, 238, 187, 1)
- HSL
- hsl(158, 80%, 67%)
- HSV
- hsv(158, 57%, 93%)
- CMYK
- cmyk(57%, 0%, 21%, 7%)
- LAB
- lab(85.6 -47.9 13.1)
- OKLCH
- oklch(86.0% 0.140 165.6)
Analysis
Color intelligence
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Gamut
The full range of colors a device or space can show. sRGB is the common screen gamut; Display P3 is wider. A color outside a gamut cannot be shown accurately there and must be mapped inward.Full glossary entry →Displays accurately on every screen and translates well to print.
Temperature
Undertone
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neutral, leaning cool
Nearest standard colors
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Delta E (ΔE)
A measure of how different two colors look. Below 1 the difference is invisible to almost everyone; below 2.3 most people can't tell them apart; above 10 they are clearly different colors. We use CIEDE2000, the modern standard.Full glossary entry →
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Delta E (ΔE)
A measure of how different two colors look. Below 1 the difference is invisible to almost everyone; below 2.3 most people can't tell them apart; above 10 they are clearly different colors. We use CIEDE2000, the modern standard.Full glossary entry →- CSS: aquamarine #7FFFD4 · ΔE 4.5
- RAL 6019: Pastel green #B7D9B1 · ΔE 13.2 · approximate
RAL values are widely published approximations of the physical standard. For Pantone-adjacent workflows, match by eye against a physical fan deck. Pantone's values are proprietary and device-dependent, so we don't print lookups.
Where Onsen works
- Web & UI: Reads as an interactive accent: fills, hovers, focus rings. Keep body text in a darker neutral.
- Interiors: Use it where you want the eye to land: a front door, built-ins, or one bold wall.
- Fashion: One garment in this color carries an outfit; two starts to compete.
- Branding: A brand green signals freshness; deepen it for finance, brighten it for eco-consumer products.
- Web & UI: Use it decoratively for dividers, chart series, and illustration accents, and let neutrals carry the type.
- Branding: Best in a brand's supporting palette: packaging interiors, patterns, campaign accents.
Copy as: every ecosystem
Variations
Tints, shades, and tones of Onsen
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Tint
A color mixed with white, which raises its lightness. Pink is a tint of red. Tints feel softer and more open than the base color.Full glossary entry →
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Tint
A color mixed with white, which raises its lightness. Pink is a tint of red. Tints feel softer and more open than the base color.Full glossary entry →Tints (lighter)
Shades (darker)
Harmonies
Color harmonies
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Complementary colors
Two colors opposite each other on the wheel. They create the strongest contrast and make each other look more intense, so they work best used unevenly.Full glossary entry →
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Complementary colors
Two colors opposite each other on the wheel. They create the strongest contrast and make each other look more intense, so they work best used unevenly.Full glossary entry →Palettes built from Onsen by rotating its hue in OKLCH space. Click any swatch to copy its hex code.
Complementary
Analogous
Triadic
Split-complementary
Tetradic
Monochromatic
Accessibility
Contrast & accessibility
Aa on white
contrast 1.45:1
AA fail AAA fail AA large fail
Aa on black
contrast 14.51:1
AA pass AAA pass AA large pass
Best text color on a Onsen background: #000000
Palettes
Palettes featuring Onsen
Onsen with its complement
Soft neighbors of Onsen
Onsen triad
Explore
Similar colors
- Aquamarine #2EE8BB · ΔE 3.7
- Mint Bliss #7EFFBA · ΔE 5.3
- Fake Jade #13EAC9 · ΔE 6.3
- Ultra Mint #A3EFB8 · ΔE 7.0
- Neo Mint #AAFFCC · ΔE 7.2
- Crystal Gem #79D0A7 · ΔE 7.4
Looking for maximum contrast instead? The complement of Onsen is closest to Manga Pink .
FAQ
Onsen FAQs
What color is Onsen?
Onsen is a medium green with the hex code #66EEBB. In HSL terms it has a hue of 158°, 80% saturation, and 67% lightness.
What is the hex code for Onsen?
The hex code for Onsen is #66EEBB. In RGB it's rgb(102, 238, 187), and in CMYK it's cmyk(57%, 0%, 21%, 7%).
What colors go well with Onsen?
Onsen pairs naturally with pink tones from its complementary harmony, and with purple accents from its split-complementary palette. Its own tints and shades always work as a monochrome scheme.
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