Indigo 7
indigo-7 · #4263EB
HEX
#4263EB
RGB
rgb(66, 99, 235)
CMYK
cmyk(72%, 58%, 0%, 8%)
HSL
hsl(228, 81%, 59%)
LAB
lab(47.1, 33.7, -72.1)
What is Indigo 7?
Indigo 7 is the indigo-7 reference in the Open Color. Its sRGB value is #4263EB (rgb 66, 99, 235). It sits in the blue family. Open Color, an open-source color palette by Heeyeun designed for UI work. 13 hues across 10 shades (0 to 9) tuned for screen legibility and accessibility. See disclaimer for accuracy and trademark notes.
Accessibility
WCAG 2.1 contrast checks for Indigo 7 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Indigo 7
An 11-step tonal scale derived from Indigo 7 (#4263EB). 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
#F0F3FD
#F0F3FD
100
#E1E6FC
#E1E6FC
200
#C3CDF9
#C3CDF9
300
#A1B1F5
#A1B1F5
400
#718AF0
#718AF0
500
#4263EB
#4263EB
600
#3854C8
#3854C8
700
#2B4099
#2B4099
800
#1E2D6A
#1E2D6A
900
#11193B
#11193B
950
#080C1C
#080C1C
Lighter tints (mixed with white)
15%
#7A8AEE
30%
#9DA7F1
45%
#B8BFF4
60%
#CFD3F7
75%
#E2E5FA
Darker shades (mixed with black)
15%
#3D5CDB
30%
#3753C9
45%
#304AB4
60%
#293F9C
75%
#1F317E
Color harmonies for Indigo 7
Classic color-theory harmonies derived from rotating the hue of Indigo 7. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#4263EB
#4263EB
#EBC942
#EBC942
Triadic
Three colors 120° apart
#4263EB
#4263EB
#EB4264
#EB4264
#64EB42
#64EB42
Analogous
Two neighbors ±30° on the wheel
#42B8EB
#42B8EB
#4263EB
#4263EB
#7542EB
#7542EB
Split-complementary
Base + two colors flanking its complement
#4263EB
#4263EB
#EB7542
#EB7542
#B8EB42
#B8EB42
Tetradic
Two complementary pairs
#4263EB
#4263EB
#C942EB
#C942EB
#EBC942
#EBC942
#64EB42
#64EB42
Square
Four colors evenly spaced 90° apart
#4263EB
#4263EB
#EB42B8
#EB42B8
#EBC942
#EBC942
#42EB75
#42EB75
Indigo 7 in every color space
Full conversion of Indigo 7 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
#4263EB
RGB
rgb(66, 99, 235)
CMYK
cmyk(72%, 58%, 0%, 8%)
HSL
hsl(228, 81%, 59%)
HSV
hsv(228, 72%, 92%)
HWB
hwb(228 26% 8%)
CIE Lab
lab(47.1 33.7 -72.1)
OKLCH
oklch(55.7% 0.208 268.4)
XYZ (D65)
xyz(21.70, 16.08, 80.54)
Copy-ready code for Indigo 7
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: #4263EB;
background-color: #4263EB;CSS variable
:root {
--color-indigo-7: #4263EB;
}Tailwind config
// tailwind.config.js
colors: {
'indigo-7': '#4263EB',
}Sass
$color-indigo-7: #4263EB;Swift UIColor
UIColor(red: 0.259, green: 0.388, blue: 0.922, alpha: 1.0)Android XML
<color name="indigo-7">#4263EB</color>Closest match in every color system
The nearest Indigo 7 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 Open Color
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 5023
#49678D
Distant blue
RAL 5015
#2271B3
Sky blue
RAL 5007
#3E5F8A
Brilliant blue
RAL 5012
#3B83BD
Light blue
RAL 5014
#606E8C
Pigeon blue
RAL 5019
#1B5583
Capri blue
FAQ about Indigo 7
What is the HEX code for Indigo 7?
Indigo 7 (indigo-7) has the HEX code #4263EB. In RGB it is rgb(66, 99, 235), and in CMYK it is cmyk(72%, 58%, 0%, 8%).
What is the OKLCH value of Indigo 7?
Indigo 7 converts to oklch(0.557 0.208 268.4). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Indigo 7 accessible for body text?
Used as a background, Indigo 7 has a contrast ratio of 4.22:1 with black text and 4.98:1 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 Indigo 7?
The closest Pantone reference to Indigo 7 by ΔE2000 perceptual distance is Pantone 7455 C (#3A5DAE). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.
What is the closest RAL color to Indigo 7?
The closest RAL Classic reference to Indigo 7 by ΔE2000 distance is RAL 5023 (Distant blue, #49678D). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Indigo 7?
The complementary color (180° opposite on the HSL color wheel) of Indigo 7 is #EBC942. Use it for high-contrast accents, error states, or call-to-action pairings.
Data provenance & source
Open Color (Yeun)
Open Color, an open-source color palette by Heeyeun designed for UI designers and developers. 13 hues across 10 shades. Use as a designer-friendly palette alternative to Tailwind. Values are intentionally chosen for UI legibility and accessibility.
- Source type
- derived
- Confidence
- high
- License
- MIT
- Last reviewed
- 2026-05-24
Workflow tags
Open Color values are tuned for digital UI. For print, treat as a starting point and proof against the substrate.