Open Book
Also known as: Cotton Blossom , Sun’s Glory , Palais White , Trite White
Open Book is what happens when orange turns pale and gentle. The effect is playful and vibrant, made for autumn palettes and friendly UI accents. Open Book plays well with white tones. The harmonies below show which ones. For accessible text, use it on black or near-black backgrounds (18.60:1, passes WCAG AA) rather than white.
Reference
Open Book color codes
- HEX
- #F5F1E5
- RGB
- rgb(245, 241, 229)
- RGBA
- rgba(245, 241, 229, 1)
- HSL
- hsl(45, 44%, 93%)
- HSV
- hsv(45, 7%, 96%)
- CMYK
- cmyk(0%, 2%, 7%, 4%)
- LAB
- lab(95.2 -0.1 6.3)
- OKLCH
- oklch(95.8% 0.016 91.6)
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 warm
subtle yellow undertone in this near-neutral
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: oldlace #FDF5E6 · ΔE 2.1
- RAL 9001: Cream #EFEBDC · ΔE 1.8 · 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 Open Book works
- Web & UI: Too light for text, ideal as a background wash that keeps a page from feeling sterile.
- Interiors: Wall-to-wall safe: it behaves like a white with personality, especially in north-facing rooms.
- Fashion: One garment in this color carries an outfit; two starts to compete.
- Branding: Best in a brand's supporting palette: packaging interiors, patterns, campaign accents.
- Web & UI: Use it decoratively for dividers, chart series, and illustration accents, and let neutrals carry the type.
- Interiors: Use it where you want the eye to land: a front door, built-ins, or one bold wall.
Copy as: every ecosystem
Variations
Tints, shades, and tones of Open Book
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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 Open Book 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 1.13:1
AA fail AAA fail AA large fail
Aa on black
contrast 18.60:1
AA pass AAA pass AA large pass
Best text color on a Open Book background: #000000
Palettes
Palettes featuring Open Book
Open Book with its complement
Soft neighbors of Open Book
Open Book triad
Explore
Similar colors
- Bianca #F4EFE0 · ΔE 1.3
- Marshmallow #F0EEE4 · ΔE 1.3
- Powdered #F9F2E7 · ΔE 1.7
- Dove’s Wing #F4F2EA · ΔE 1.8
- Palladian #EEE9DF · ΔE 2.0
- Fuji Peak #F6EEE2 · ΔE 2.0
Looking for maximum contrast instead? The complement of Open Book is closest to Cotton Boll .
FAQ
Open Book FAQs
What color is Open Book?
Open Book is a light orange with the hex code #F5F1E5. In HSL terms it has a hue of 45°, 44% saturation, and 93% lightness.
What is the hex code for Open Book?
The hex code for Open Book is #F5F1E5. In RGB it's rgb(245, 241, 229), and in CMYK it's cmyk(0%, 2%, 7%, 4%).
What colors go well with Open Book?
Open Book pairs naturally with white tones from its complementary harmony. Its own tints and shades always work as a monochrome scheme.
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