Lightblue4
lightblue4 · #68838B
HEX
#68838B
RGB
rgb(104, 131, 139)
CMYK
cmyk(25%, 6%, 0%, 45%)
HSL
hsl(194, 14%, 48%)
LAB
lab(53.0, -7.7, -7.5)
What is Lightblue4?
Lightblue4 is the lightblue4 reference in the X11 named colors. Its sRGB value is #68838B (rgb 104, 131, 139). It sits in the cyan 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 Lightblue4 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Lightblue4
An 11-step tonal scale derived from Lightblue4 (#68838B). 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
#F3F5F6
#F3F5F6
100
#E7EBEC
#E7EBEC
200
#CFD7DA
#CFD7DA
300
#B4C1C5
#B4C1C5
400
#8EA2A8
#8EA2A8
500
#68838B
#68838B
600
#586F76
#586F76
700
#44555A
#44555A
800
#2F3B3F
#2F3B3F
900
#1A2123
#1A2123
950
#0C1011
#0C1011
Lighter tints (mixed with white)
15%
#8D9EA4
30%
#A9B4B8
45%
#C0C8CA
60%
#D4D9DA
75%
#E5E8E9
Darker shades (mixed with black)
15%
#607A81
30%
#586F76
45%
#4E6369
60%
#43555A
75%
#344348
Color harmonies for Lightblue4
Classic color-theory harmonies derived from rotating the hue of Lightblue4. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#68838B
#68838B
#8C7169
#8C7169
Triadic
Three colors 120° apart
#68838B
#68838B
#8C6984
#8C6984
#848C69
#848C69
Analogous
Two neighbors ±30° on the wheel
#698C82
#698C82
#68838B
#68838B
#69728C
#69728C
Split-complementary
Base + two colors flanking its complement
#68838B
#68838B
#8C6972
#8C6972
#8C8269
#8C8269
Tetradic
Two complementary pairs
#68838B
#68838B
#71698C
#71698C
#8C7169
#8C7169
#848C69
#848C69
Square
Four colors evenly spaced 90° apart
#68838B
#68838B
#82698C
#82698C
#8C7169
#8C7169
#728C69
#728C69
Lightblue4 in every color space
Full conversion of Lightblue4 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
#68838B
RGB
rgb(104, 131, 139)
CMYK
cmyk(25%, 6%, 0%, 45%)
HSL
hsl(194, 14%, 48%)
HSV
hsv(194, 25%, 55%)
HWB
hwb(194 41% 45%)
CIE Lab
lab(53.0 -7.7 -7.5)
OKLCH
oklch(59.2% 0.033 217.8)
XYZ (D65)
xyz(18.48, 21.04, 27.51)
Copy-ready code for Lightblue4
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: #68838B;
background-color: #68838B;CSS variable
:root {
--color-lightblue4: #68838B;
}Tailwind config
// tailwind.config.js
colors: {
'lightblue4': '#68838B',
}Sass
$color-lightblue4: #68838B;Swift UIColor
UIColor(red: 0.408, green: 0.514, blue: 0.545, alpha: 1.0)Android XML
<color name="lightblue4">#68838B</color>Closest match in every color system
The nearest Lightblue4 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 7000
#7E8B92
Squirrel grey
RAL 5018
#3F888F
Turquoise blue
RAL 7037
#7D7F7D
Dusty grey
RAL 7005
#6B716F
Mouse grey
RAL 7001
#8F999F
Silver grey
RAL 9023
#787878
Pearl dark grey
FAQ about Lightblue4
What is the HEX code for Lightblue4?
Lightblue4 (lightblue4) has the HEX code #68838B. In RGB it is rgb(104, 131, 139), and in CMYK it is cmyk(25%, 6%, 0%, 45%).
What is the OKLCH value of Lightblue4?
Lightblue4 converts to oklch(0.592 0.033 217.8). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Lightblue4 accessible for body text?
Used as a background, Lightblue4 has a contrast ratio of 5.21:1 with black text and 4.03:1 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 Lightblue4?
The closest Pantone reference to Lightblue4 by ΔE2000 perceptual distance is Pantone Cool Gray 9 C (#75787B). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.
What is the closest RAL color to Lightblue4?
The closest RAL Classic reference to Lightblue4 by ΔE2000 distance is RAL 7000 (Squirrel grey, #7E8B92). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Lightblue4?
The complementary color (180° opposite on the HSL color wheel) of Lightblue4 is #8C7169. 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.