Paleturquoise4
paleturquoise4 · #668B8B
HEX
#668B8B
RGB
rgb(102, 139, 139)
CMYK
cmyk(27%, 0%, 0%, 45%)
HSL
hsl(180, 15%, 47%)
LAB
lab(55.2, -12.8, -4.2)
What is Paleturquoise4?
Paleturquoise4 is the paleturquoise4 reference in the X11 named colors. Its sRGB value is #668B8B (rgb 102, 139, 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 Paleturquoise4 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Paleturquoise4
An 11-step tonal scale derived from Paleturquoise4 (#668B8B). 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
#F3F6F6
#F3F6F6
100
#E7ECEC
#E7ECEC
200
#CEDADA
#CEDADA
300
#B3C5C5
#B3C5C5
400
#8CA8A8
#8CA8A8
500
#668B8B
#668B8B
600
#577676
#577676
700
#425A5A
#425A5A
800
#2E3F3F
#2E3F3F
900
#1A2323
#1A2323
950
#0C1111
#0C1111
Lighter tints (mixed with white)
15%
#8CA4A4
30%
#A8B8B8
45%
#BFCACA
60%
#D3DADA
75%
#E5E9E9
Darker shades (mixed with black)
15%
#5E8181
30%
#567676
45%
#4C6969
60%
#415A5A
75%
#334848
Color harmonies for Paleturquoise4
Classic color-theory harmonies derived from rotating the hue of Paleturquoise4. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#668B8B
#668B8B
#8A6666
#8A6666
Triadic
Three colors 120° apart
#668B8B
#668B8B
#8A668A
#8A668A
#8A8A66
#8A8A66
Analogous
Two neighbors ±30° on the wheel
#668A78
#668A78
#668B8B
#668B8B
#66788A
#66788A
Split-complementary
Base + two colors flanking its complement
#668B8B
#668B8B
#8A6678
#8A6678
#8A7866
#8A7866
Tetradic
Two complementary pairs
#668B8B
#668B8B
#66668A
#66668A
#8A6666
#8A6666
#8A8A66
#8A8A66
Square
Four colors evenly spaced 90° apart
#668B8B
#668B8B
#78668A
#78668A
#8A6666
#8A6666
#788A66
#788A66
Paleturquoise4 in every color space
Full conversion of Paleturquoise4 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
#668B8B
RGB
rgb(102, 139, 139)
CMYK
cmyk(27%, 0%, 0%, 45%)
HSL
hsl(180, 15%, 47%)
HSV
hsv(180, 27%, 55%)
HWB
hwb(180 40% 45%)
CIE Lab
lab(55.2 -12.8 -4.2)
OKLCH
oklch(60.9% 0.041 196.1)
XYZ (D65)
xyz(19.37, 23.15, 27.87)
Copy-ready code for Paleturquoise4
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: #668B8B;
background-color: #668B8B;CSS variable
:root {
--color-paleturquoise4: #668B8B;
}Tailwind config
// tailwind.config.js
colors: {
'paleturquoise4': '#668B8B',
}Sass
$color-paleturquoise4: #668B8B;Swift UIColor
UIColor(red: 0.400, green: 0.545, blue: 0.545, alpha: 1.0)Android XML
<color name="paleturquoise4">#668B8B</color>Closest match in every color system
The nearest Paleturquoise4 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 5024
#5D9B9B
Pastel blue
RAL 5018
#3F888F
Turquoise blue
RAL 7000
#7E8B92
Squirrel grey
RAL 7042
#8D948D
Traffic grey A
RAL 7001
#8F999F
Silver grey
RAL 7033
#7D8471
Cement grey
FAQ about Paleturquoise4
What is the HEX code for Paleturquoise4?
Paleturquoise4 (paleturquoise4) has the HEX code #668B8B. In RGB it is rgb(102, 139, 139), and in CMYK it is cmyk(27%, 0%, 0%, 45%).
What is the OKLCH value of Paleturquoise4?
Paleturquoise4 converts to oklch(0.609 0.041 196.1). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Paleturquoise4 accessible for body text?
Used as a background, Paleturquoise4 has a contrast ratio of 5.63:1 with black text and 3.73:1 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 Paleturquoise4?
The closest Pantone reference to Paleturquoise4 by ΔE2000 perceptual distance is Pantone 321 C (#008C95). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.
What is the closest RAL color to Paleturquoise4?
The closest RAL Classic reference to Paleturquoise4 by ΔE2000 distance is RAL 5024 (Pastel blue, #5D9B9B). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Paleturquoise4?
The complementary color (180° opposite on the HSL color wheel) of Paleturquoise4 is #8A6666. 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.