Red 0
red-0 · #FFF5F5
HEX
#FFF5F5
RGB
rgb(255, 245, 245)
CMYK
cmyk(0%, 4%, 4%, 0%)
HSL
hsl(0, 100%, 98%)
LAB
lab(97.3, 3.3, 1.2)
What is Red 0?
Red 0 is the red-0 reference in the Open Color. Its sRGB value is #FFF5F5 (rgb 255, 245, 245). It sits in the red family. Open Color, an open-source color palette by Heeyeun designed for UI work. 13 hues across 10 shades (0 to 9) tuned for screen legibility and accessibility. See disclaimer for accuracy and trademark notes.
Accessibility
WCAG 2.1 contrast checks for Red 0 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Red 0
An 11-step tonal scale derived from Red 0 (#FFF5F5). Click any swatch to copy its HEX. Use these as a starting point for design tokens, hover states, and disabled states in a design system.
50
#FFFEFE
#FFFEFE
100
#FFFDFD
#FFFDFD
200
#FFFCFC
#FFFCFC
300
#FFFAFA
#FFFAFA
400
#FFF8F8
#FFF8F8
500
#FFF5F5
#FFF5F5
600
#D9D0D0
#D9D0D0
700
#A69F9F
#A69F9F
800
#736E6E
#736E6E
900
#403D3D
#403D3D
950
#1F1D1D
#1F1D1D
Lighter tints (mixed with white)
15%
#FFF7F7
30%
#FFF8F8
45%
#FFFAFA
60%
#FFFBFB
75%
#FFFDFD
Darker shades (mixed with black)
15%
#EDE4E4
30%
#DAD1D1
45%
#C4BCBC
60%
#AAA3A3
75%
#898383
Color harmonies for Red 0
Classic color-theory harmonies derived from rotating the hue of Red 0. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#FFF5F5
#FFF5F5
#F5FFFF
#F5FFFF
Triadic
Three colors 120° apart
#FFF5F5
#FFF5F5
#F5FFF5
#F5FFF5
#F5F5FF
#F5F5FF
Analogous
Two neighbors ±30° on the wheel
#FFF5FA
#FFF5FA
#FFF5F5
#FFF5F5
#FFFAF5
#FFFAF5
Split-complementary
Base + two colors flanking its complement
#FFF5F5
#FFF5F5
#F5FFFA
#F5FFFA
#F5FAFF
#F5FAFF
Tetradic
Two complementary pairs
#FFF5F5
#FFF5F5
#FFFFF5
#FFFFF5
#F5FFFF
#F5FFFF
#F5F5FF
#F5F5FF
Square
Four colors evenly spaced 90° apart
#FFF5F5
#FFF5F5
#FAFFF5
#FAFFF5
#F5FFFF
#F5FFFF
#FAF5FF
#FAF5FF
Red 0 in every color space
Full conversion of Red 0 across the color spaces designers and developers actually use — including OKLCH (the perceptually-uniform space that powers Tailwind v4 and CSS Color Module Level 4) and HWB.
HEX
#FFF5F5
RGB
rgb(255, 245, 245)
CMYK
cmyk(0%, 4%, 4%, 0%)
HSL
hsl(0, 100%, 98%)
HSV
hsv(0, 4%, 100%)
HWB
hwb(0 96% 0%)
CIE Lab
lab(97.3 3.3 1.2)
OKLCH
oklch(97.8% 0.011 17.3)
XYZ (D65)
xyz(90.37, 93.16, 99.59)
Copy-ready code for Red 0
Drop-in snippets for CSS, Tailwind, Sass, iOS Swift, and Android XML. Click the copy button on any snippet to put it on your clipboard.
CSS
color: #FFF5F5;
background-color: #FFF5F5;CSS variable
:root {
--color-red-0: #FFF5F5;
}Tailwind config
// tailwind.config.js
colors: {
'red-0': '#FFF5F5',
}Sass
$color-red-0: #FFF5F5;Swift UIColor
UIColor(red: 1.000, green: 0.961, blue: 0.961, alpha: 1.0)Android XML
<color name="red-0">#FFF5F5</color>Closest match in every color system
The nearest Red 0 equivalent in every other color system on this site, ranked by ΔE2000 perceptual distance. Useful when translating between design-system, web-standard, and industrial color references.
Closest in Open Color
Top 6 ΔE2000-closest entries within the same collection.
Closest Pantone matches
Top 6 ΔE2000-closest Pantone references. Cross-system matching is approximate — see disclaimer.
Closest RAL Classic matches
Top 6 ΔE2000-closest RAL Classic references for industrial coating cross-reference.
RAL 9016
#F6F6F6
Traffic white
RAL 9003
#F4F4F4
Signal white
RAL 9010
#FFFFFF
Pure white
RAL 7035
#D7D7D7
Light grey
RAL 9018
#D7D7D7
Papyrus white
RAL 9001
#FDF4E3
Cream
FAQ about Red 0
What is the HEX code for Red 0?
Red 0 (red-0) has the HEX code #FFF5F5. In RGB it is rgb(255, 245, 245), and in CMYK it is cmyk(0%, 4%, 4%, 0%).
What is the OKLCH value of Red 0?
Red 0 converts to oklch(0.978 0.011 17.3). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Red 0 accessible for body text?
Used as a background, Red 0 has a contrast ratio of 19.63:1 with black text and 1.07:1 with white text. WCAG 2.1 AA requires 4.5:1 for normal text. The current recommendation is to use black text and verify in real UI context.
What is the closest Pantone to Red 0?
The closest Pantone reference to Red 0 by ΔE2000 perceptual distance is Pantone Cool Gray 1 C (#D9D9D6). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.
What is the closest RAL color to Red 0?
The closest RAL Classic reference to Red 0 by ΔE2000 distance is RAL 9016 (Traffic white, #F6F6F6). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Red 0?
The complementary color (180° opposite on the HSL color wheel) of Red 0 is #F5FFFF. Use it for high-contrast accents, error states, or call-to-action pairings.
Data provenance & source
Open Color (Yeun)
Open Color, an open-source color palette by Heeyeun designed for UI designers and developers. 13 hues across 10 shades. Use as a designer-friendly palette alternative to Tailwind. Values are intentionally chosen for UI legibility and accessibility.
- Source type
- derived
- Confidence
- high
- License
- MIT
- Last reviewed
- 2026-05-24
Workflow tags
Open Color values are tuned for digital UI. For print, treat as a starting point and proof against the substrate.