Skyblue1
skyblue1 · #87CEFF
HEX
#87CEFF
RGB
rgb(135, 206, 255)
CMYK
cmyk(47%, 19%, 0%, 0%)
HSL
hsl(205, 100%, 76%)
LAB
lab(79.9, -9.5, -30.9)
What is Skyblue1?
Skyblue1 is the skyblue1 reference in the X11 named colors. Its sRGB value is #87CEFF (rgb 135, 206, 255). It sits in the blue family. Historical X Window System color names — the numbered 1-4 lightness variants of the classic xorg-server rgb.txt palette. See disclaimer for accuracy and trademark notes.
Accessibility
WCAG 2.1 contrast checks for Skyblue1 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Skyblue1
An 11-step tonal scale derived from Skyblue1 (#87CEFF). 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
#F5FBFF
#F5FBFF
100
#ECF7FF
#ECF7FF
200
#D9EFFF
#D9EFFF
300
#C3E7FF
#C3E7FF
400
#A5DAFF
#A5DAFF
500
#87CEFF
#87CEFF
600
#73AFD9
#73AFD9
700
#5886A6
#5886A6
800
#3D5D73
#3D5D73
900
#223440
#223440
950
#10191F
#10191F
Lighter tints (mixed with white)
15%
#A1D6FF
30%
#B6DEFF
45%
#C9E6FF
60%
#D9EDFF
75%
#E8F4FF
Darker shades (mixed with black)
15%
#7DC0ED
30%
#72B0DA
45%
#669DC4
60%
#5888AA
75%
#466D89
Color harmonies for Skyblue1
Classic color-theory harmonies derived from rotating the hue of Skyblue1. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#87CEFF
#87CEFF
#FFB885
#FFB885
Triadic
Three colors 120° apart
#87CEFF
#87CEFF
#FF85CC
#FF85CC
#CCFF85
#CCFF85
Analogous
Two neighbors ±30° on the wheel
#85FFF5
#85FFF5
#87CEFF
#87CEFF
#858FFF
#858FFF
Split-complementary
Base + two colors flanking its complement
#87CEFF
#87CEFF
#FF858F
#FF858F
#FFF585
#FFF585
Tetradic
Two complementary pairs
#87CEFF
#87CEFF
#B885FF
#B885FF
#FFB885
#FFB885
#CCFF85
#CCFF85
Square
Four colors evenly spaced 90° apart
#87CEFF
#87CEFF
#F585FF
#F585FF
#FFB885
#FFB885
#8FFF85
#8FFF85
Skyblue1 in every color space
Full conversion of Skyblue1 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
#87CEFF
RGB
rgb(135, 206, 255)
CMYK
cmyk(47%, 19%, 0%, 0%)
HSL
hsl(205, 100%, 76%)
HSV
hsv(205, 47%, 100%)
HWB
hwb(205 53% 0%)
CIE Lab
lab(79.9 -9.5 -30.9)
OKLCH
oklch(82.3% 0.099 239.7)
XYZ (D65)
xyz(50.11, 56.51, 102.86)
Copy-ready code for Skyblue1
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: #87CEFF;
background-color: #87CEFF;CSS variable
:root {
--color-skyblue1: #87CEFF;
}Tailwind config
// tailwind.config.js
colors: {
'skyblue1': '#87CEFF',
}Sass
$color-skyblue1: #87CEFF;Swift UIColor
UIColor(red: 0.529, green: 0.808, blue: 1.000, alpha: 1.0)Android XML
<color name="skyblue1">#87CEFF</color>Closest match in every color system
The nearest Skyblue1 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 X11 named colors
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 6027
#84C3BE
Light green
RAL 7035
#D7D7D7
Light grey
RAL 9018
#D7D7D7
Papyrus white
RAL 7040
#9DA1AA
Window grey
RAL 7001
#8F999F
Silver grey
RAL 7004
#9EA0A1
Signal grey
FAQ about Skyblue1
What is the HEX code for Skyblue1?
Skyblue1 (skyblue1) has the HEX code #87CEFF. In RGB it is rgb(135, 206, 255), and in CMYK it is cmyk(47%, 19%, 0%, 0%).
What is the OKLCH value of Skyblue1?
Skyblue1 converts to oklch(0.823 0.099 239.7). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Skyblue1 accessible for body text?
Used as a background, Skyblue1 has a contrast ratio of 12.30:1 with black text and 1.71:1 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 Skyblue1?
The closest Pantone reference to Skyblue1 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 Skyblue1?
The closest RAL Classic reference to Skyblue1 by ΔE2000 distance is RAL 6027 (Light green, #84C3BE). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Skyblue1?
The complementary color (180° opposite on the HSL color wheel) of Skyblue1 is #FFB885. Use it for high-contrast accents, error states, or call-to-action pairings.
Data provenance & source
X11 named colors (xorg rgb.txt)
The historical X11 color name list shipped in the xorg-server rgb.txt file. Roughly 550 entries covering classic computing color names like 'PapayaWhip', 'MediumAquamarine', and 'DarkSlateGray'. Many CSS named colors originate here. Use as a reference for legacy and creative color names. Most modern CSS implementations accept these names directly.
- Source type
- derived
- Confidence
- high
- License
- MIT/X11 license (X Consortium)
- Last reviewed
- 2026-05-24
Workflow tags
X11 colors are sRGB digital values from a 1980s color system. For print, convert to a process-appropriate color and proof against substrate.