Blue 2
blue-2 · #A5D8FF
HEX
#A5D8FF
RGB
rgb(165, 216, 255)
CMYK
cmyk(35%, 15%, 0%, 0%)
HSL
hsl(206, 100%, 82%)
LAB
lab(84.1, -7.2, -24.3)
What is Blue 2?
Blue 2 is the blue-2 reference in the Open Color. Its sRGB value is #A5D8FF (rgb 165, 216, 255). It sits in the blue 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 Blue 2 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Blue 2
An 11-step tonal scale derived from Blue 2 (#A5D8FF). 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
#F8FCFF
#F8FCFF
100
#F1F9FF
#F1F9FF
200
#E2F3FF
#E2F3FF
300
#D2ECFF
#D2ECFF
400
#BCE2FF
#BCE2FF
500
#A5D8FF
#A5D8FF
600
#8CB8D9
#8CB8D9
700
#6B8CA6
#6B8CA6
800
#4A6173
#4A6173
900
#293640
#293640
950
#141A1F
#141A1F
Lighter tints (mixed with white)
15%
#B6DEFF
30%
#C6E5FF
45%
#D4EBFF
60%
#E1F0FF
75%
#EDF6FF
Darker shades (mixed with black)
15%
#99C9ED
30%
#8CB8DA
45%
#7EA5C4
60%
#6C8FAA
75%
#567389
Color harmonies for Blue 2
Classic color-theory harmonies derived from rotating the hue of Blue 2. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#A5D8FF
#A5D8FF
#FFCBA3
#FFCBA3
Triadic
Three colors 120° apart
#A5D8FF
#A5D8FF
#FFA3D7
#FFA3D7
#D7FFA3
#D7FFA3
Analogous
Two neighbors ±30° on the wheel
#A3FFF9
#A3FFF9
#A5D8FF
#A5D8FF
#A3A9FF
#A3A9FF
Split-complementary
Base + two colors flanking its complement
#A5D8FF
#A5D8FF
#FFA3A9
#FFA3A9
#FFF9A3
#FFF9A3
Tetradic
Two complementary pairs
#A5D8FF
#A5D8FF
#CBA3FF
#CBA3FF
#FFCBA3
#FFCBA3
#D7FFA3
#D7FFA3
Square
Four colors evenly spaced 90° apart
#A5D8FF
#A5D8FF
#F9A3FF
#F9A3FF
#FFCBA3
#FFCBA3
#A9FFA3
#A9FFA3
Blue 2 in every color space
Full conversion of Blue 2 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
#A5D8FF
RGB
rgb(165, 216, 255)
CMYK
cmyk(35%, 15%, 0%, 0%)
HSL
hsl(206, 100%, 82%)
HSV
hsv(206, 35%, 100%)
HWB
hwb(206 65% 0%)
CIE Lab
lab(84.1 -7.2 -24.3)
OKLCH
oklch(86.0% 0.076 241.7)
XYZ (D65)
xyz(58.12, 64.33, 103.94)
Copy-ready code for Blue 2
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: #A5D8FF;
background-color: #A5D8FF;CSS variable
:root {
--color-blue-2: #A5D8FF;
}Tailwind config
// tailwind.config.js
colors: {
'blue-2': '#A5D8FF',
}Sass
$color-blue-2: #A5D8FF;Swift UIColor
UIColor(red: 0.647, green: 0.847, blue: 1.000, alpha: 1.0)Android XML
<color name="blue-2">#A5D8FF</color>Closest match in every color system
The nearest Blue 2 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 7035
#D7D7D7
Light grey
RAL 9018
#D7D7D7
Papyrus white
RAL 9003
#F4F4F4
Signal white
RAL 6027
#84C3BE
Light green
RAL 9016
#F6F6F6
Traffic white
RAL 7040
#9DA1AA
Window grey
FAQ about Blue 2
What is the HEX code for Blue 2?
Blue 2 (blue-2) has the HEX code #A5D8FF. In RGB it is rgb(165, 216, 255), and in CMYK it is cmyk(35%, 15%, 0%, 0%).
What is the OKLCH value of Blue 2?
Blue 2 converts to oklch(0.860 0.076 241.7). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Blue 2 accessible for body text?
Used as a background, Blue 2 has a contrast ratio of 13.87:1 with black text and 1.51:1 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 Blue 2?
The closest Pantone reference to Blue 2 by ΔE2000 perceptual distance is Pantone 291 C (#9BCBEB). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.
What is the closest RAL color to Blue 2?
The closest RAL Classic reference to Blue 2 by ΔE2000 distance is RAL 7035 (Light grey, #D7D7D7). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Blue 2?
The complementary color (180° opposite on the HSL color wheel) of Blue 2 is #FFCBA3. 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.