Deepskyblue4
deepskyblue4 · #00688B
HEX
#00688B
RGB
rgb(0, 104, 139)
CMYK
cmyk(100%, 25%, 0%, 45%)
HSL
hsl(195, 100%, 27%)
LAB
lab(40.8, -12.1, -26.4)
What is Deepskyblue4?
Deepskyblue4 is the deepskyblue4 reference in the X11 named colors. Its sRGB value is #00688B (rgb 0, 104, 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 Deepskyblue4 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Deepskyblue4
An 11-step tonal scale derived from Deepskyblue4 (#00688B). 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
#EBF3F6
#EBF3F6
100
#D6E7EC
#D6E7EC
200
#ADCFDA
#ADCFDA
300
#80B4C5
#80B4C5
400
#408EA8
#408EA8
500
#00688B
#00688B
600
#005876
#005876
700
#00445A
#00445A
800
#002F3F
#002F3F
900
#001A23
#001A23
950
#000C11
#000C11
Lighter tints (mixed with white)
15%
#6C8DA4
30%
#95A9B8
45%
#B3C0CA
60%
#CBD4DA
75%
#E1E5E9
Darker shades (mixed with black)
15%
#006081
30%
#005876
45%
#004E69
60%
#00435A
75%
#003448
Color harmonies for Deepskyblue4
Classic color-theory harmonies derived from rotating the hue of Deepskyblue4. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#00688B
#00688B
#8A2200
#8A2200
Triadic
Three colors 120° apart
#00688B
#00688B
#8A0067
#8A0067
#678A00
#678A00
Analogous
Two neighbors ±30° on the wheel
#008A67
#008A67
#00688B
#00688B
#00228A
#00228A
Split-complementary
Base + two colors flanking its complement
#00688B
#00688B
#8A0022
#8A0022
#8A6700
#8A6700
Tetradic
Two complementary pairs
#00688B
#00688B
#22008A
#22008A
#8A2200
#8A2200
#678A00
#678A00
Square
Four colors evenly spaced 90° apart
#00688B
#00688B
#67008A
#67008A
#8A2200
#8A2200
#228A00
#228A00
Deepskyblue4 in every color space
Full conversion of Deepskyblue4 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
#00688B
RGB
rgb(0, 104, 139)
CMYK
cmyk(100%, 25%, 0%, 45%)
HSL
hsl(195, 100%, 27%)
HSV
hsv(195, 100%, 55%)
HWB
hwb(195 0% 45%)
CIE Lab
lab(40.8 -12.1 -26.4)
OKLCH
oklch(48.5% 0.097 230.3)
XYZ (D65)
xyz(9.61, 11.76, 26.19)
Copy-ready code for Deepskyblue4
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: #00688B;
background-color: #00688B;CSS variable
:root {
--color-deepskyblue4: #00688B;
}Tailwind config
// tailwind.config.js
colors: {
'deepskyblue4': '#00688B',
}Sass
$color-deepskyblue4: #00688B;Swift UIColor
UIColor(red: 0.000, green: 0.408, blue: 0.545, alpha: 1.0)Android XML
<color name="deepskyblue4">#00688B</color>Closest match in every color system
The nearest Deepskyblue4 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 5021
#256D7B
Water blue
RAL 5009
#025669
Azure blue
RAL 5019
#1B5583
Capri blue
RAL 5015
#2271B3
Sky blue
RAL 5023
#49678D
Distant blue
RAL 5007
#3E5F8A
Brilliant blue
FAQ about Deepskyblue4
What is the HEX code for Deepskyblue4?
Deepskyblue4 (deepskyblue4) has the HEX code #00688B. In RGB it is rgb(0, 104, 139), and in CMYK it is cmyk(100%, 25%, 0%, 45%).
What is the OKLCH value of Deepskyblue4?
Deepskyblue4 converts to oklch(0.485 0.097 230.3). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Deepskyblue4 accessible for body text?
Used as a background, Deepskyblue4 has a contrast ratio of 3.35:1 with black text and 6.26:1 with white text. WCAG 2.1 AA requires 4.5:1 for normal text. The current recommendation is to use white text and verify in real UI context.
What is the closest Pantone to Deepskyblue4?
The closest Pantone reference to Deepskyblue4 by ΔE2000 perceptual distance is Pantone 3145 C (#00677F). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.
What is the closest RAL color to Deepskyblue4?
The closest RAL Classic reference to Deepskyblue4 by ΔE2000 distance is RAL 5021 (Water blue, #256D7B). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Deepskyblue4?
The complementary color (180° opposite on the HSL color wheel) of Deepskyblue4 is #8A2200. 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.