Aquamarine4
aquamarine4 · #458B74
HEX
#458B74
RGB
rgb(69, 139, 116)
CMYK
cmyk(50%, 0%, 17%, 45%)
HSL
hsl(160, 34%, 41%)
LAB
lab(52.9, -27.9, 5.6)
What is Aquamarine4?
Aquamarine4 is the aquamarine4 reference in the X11 named colors. Its sRGB value is #458B74 (rgb 69, 139, 116). 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 Aquamarine4 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Aquamarine4
An 11-step tonal scale derived from Aquamarine4 (#458B74). 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
#F0F6F4
#F0F6F4
100
#E1ECE9
#E1ECE9
200
#C3DAD3
#C3DAD3
300
#A2C5BA
#A2C5BA
400
#74A897
#74A897
500
#458B74
#458B74
600
#3B7663
#3B7663
700
#2D5A4B
#2D5A4B
800
#1F3F34
#1F3F34
900
#11231D
#11231D
950
#08110E
#08110E
Lighter tints (mixed with white)
15%
#7CA495
30%
#9EB8AE
45%
#B9CAC3
60%
#CFDAD6
75%
#E3E9E6
Darker shades (mixed with black)
15%
#40816B
30%
#3A7662
45%
#336957
60%
#2B5A4B
75%
#21483B
Color harmonies for Aquamarine4
Classic color-theory harmonies derived from rotating the hue of Aquamarine4. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#458B74
#458B74
#8C455D
#8C455D
Triadic
Three colors 120° apart
#458B74
#458B74
#74458C
#74458C
#8C7445
#8C7445
Analogous
Two neighbors ±30° on the wheel
#458C51
#458C51
#458B74
#458B74
#45808C
#45808C
Split-complementary
Base + two colors flanking its complement
#458B74
#458B74
#8C4580
#8C4580
#8C5145
#8C5145
Tetradic
Two complementary pairs
#458B74
#458B74
#455D8C
#455D8C
#8C455D
#8C455D
#8C7445
#8C7445
Square
Four colors evenly spaced 90° apart
#458B74
#458B74
#51458C
#51458C
#8C455D
#8C455D
#808C45
#808C45
Aquamarine4 in every color space
Full conversion of Aquamarine4 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
#458B74
RGB
rgb(69, 139, 116)
CMYK
cmyk(50%, 0%, 17%, 45%)
HSL
hsl(160, 34%, 41%)
HSV
hsv(160, 50%, 55%)
HWB
hwb(160 27% 45%)
CIE Lab
lab(52.9 -27.9 5.6)
OKLCH
oklch(58.4% 0.080 169.7)
XYZ (D65)
xyz(14.84, 20.99, 19.79)
Copy-ready code for Aquamarine4
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: #458B74;
background-color: #458B74;CSS variable
:root {
--color-aquamarine4: #458B74;
}Tailwind config
// tailwind.config.js
colors: {
'aquamarine4': '#458B74',
}Sass
$color-aquamarine4: #458B74;Swift UIColor
UIColor(red: 0.271, green: 0.545, blue: 0.455, alpha: 1.0)Android XML
<color name="aquamarine4">#458B74</color>Closest match in every color system
The nearest Aquamarine4 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 6024
#308446
Traffic green
RAL 5024
#5D9B9B
Pastel blue
RAL 5018
#3F888F
Turquoise blue
RAL 6000
#316650
Patina green
RAL 6011
#587246
Reseda green
RAL 6017
#4C9141
May green
FAQ about Aquamarine4
What is the HEX code for Aquamarine4?
Aquamarine4 (aquamarine4) has the HEX code #458B74. In RGB it is rgb(69, 139, 116), and in CMYK it is cmyk(50%, 0%, 17%, 45%).
What is the OKLCH value of Aquamarine4?
Aquamarine4 converts to oklch(0.584 0.080 169.7). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Aquamarine4 accessible for body text?
Used as a background, Aquamarine4 has a contrast ratio of 5.20:1 with black text and 4.04:1 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 Aquamarine4?
The closest Pantone reference to Aquamarine4 by ΔE2000 perceptual distance is Pantone Green C (#00AB84). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.
What is the closest RAL color to Aquamarine4?
The closest RAL Classic reference to Aquamarine4 by ΔE2000 distance is RAL 6024 (Traffic green, #308446). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Aquamarine4?
The complementary color (180° opposite on the HSL color wheel) of Aquamarine4 is #8C455D. 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.