Indigo 3
indigo-3 · #91A7FF
HEX
#91A7FF
RGB
rgb(145, 167, 255)
CMYK
cmyk(43%, 35%, 0%, 0%)
HSL
hsl(228, 100%, 78%)
LAB
lab(70.1, 14.4, -46.1)
What is Indigo 3?
Indigo 3 is the indigo-3 reference in the Open Color. Its sRGB value is #91A7FF (rgb 145, 167, 255). 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 3 as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Indigo 3
An 11-step tonal scale derived from Indigo 3 (#91A7FF). 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
#F6F8FF
#F6F8FF
100
#EDF1FF
#EDF1FF
200
#DCE3FF
#DCE3FF
300
#C8D3FF
#C8D3FF
400
#ADBDFF
#ADBDFF
500
#91A7FF
#91A7FF
600
#7B8ED9
#7B8ED9
700
#5E6DA6
#5E6DA6
800
#414B73
#414B73
900
#242A40
#242A40
950
#11141F
#11141F
Lighter tints (mixed with white)
15%
#A8B8FF
30%
#BBC7FF
45%
#CCD5FF
60%
#DCE1FF
75%
#EAEDFF
Darker shades (mixed with black)
15%
#879BED
30%
#7B8EDA
45%
#6E7FC4
60%
#5F6EAA
75%
#4B5889
Color harmonies for Indigo 3
Classic color-theory harmonies derived from rotating the hue of Indigo 3. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#91A7FF
#91A7FF
#FFE98F
#FFE98F
Triadic
Three colors 120° apart
#91A7FF
#91A7FF
#FF8FA5
#FF8FA5
#A5FF8F
#A5FF8F
Analogous
Two neighbors ±30° on the wheel
#8FDDFF
#8FDDFF
#91A7FF
#91A7FF
#B08FFF
#B08FFF
Split-complementary
Base + two colors flanking its complement
#91A7FF
#91A7FF
#FFB08F
#FFB08F
#DDFF8F
#DDFF8F
Tetradic
Two complementary pairs
#91A7FF
#91A7FF
#E98FFF
#E98FFF
#FFE98F
#FFE98F
#A5FF8F
#A5FF8F
Square
Four colors evenly spaced 90° apart
#91A7FF
#91A7FF
#FF8FDD
#FF8FDD
#FFE98F
#FFE98F
#8FFFB0
#8FFFB0
Indigo 3 in every color space
Full conversion of Indigo 3 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
#91A7FF
RGB
rgb(145, 167, 255)
CMYK
cmyk(43%, 35%, 0%, 0%)
HSL
hsl(228, 100%, 78%)
HSV
hsv(228, 43%, 100%)
HWB
hwb(228 57% 0%)
CIE Lab
lab(70.1 14.4 -46.1)
OKLCH
oklch(74.7% 0.130 272.3)
XYZ (D65)
xyz(43.54, 40.87, 100.18)
Copy-ready code for Indigo 3
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: #91A7FF;
background-color: #91A7FF;CSS variable
:root {
--color-indigo-3: #91A7FF;
}Tailwind config
// tailwind.config.js
colors: {
'indigo-3': '#91A7FF',
}Sass
$color-indigo-3: #91A7FF;Swift UIColor
UIColor(red: 0.569, green: 0.655, blue: 1.000, alpha: 1.0)Android XML
<color name="indigo-3">#91A7FF</color>Closest match in every color system
The nearest Indigo 3 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 7001
#8F999F
Silver grey
RAL 5012
#3B83BD
Light blue
RAL 7040
#9DA1AA
Window grey
RAL 7000
#7E8B92
Squirrel grey
RAL 7004
#9EA0A1
Signal grey
RAL 5015
#2271B3
Sky blue
FAQ about Indigo 3
What is the HEX code for Indigo 3?
Indigo 3 (indigo-3) has the HEX code #91A7FF. In RGB it is rgb(145, 167, 255), and in CMYK it is cmyk(43%, 35%, 0%, 0%).
What is the OKLCH value of Indigo 3?
Indigo 3 converts to oklch(0.747 0.130 272.3). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Indigo 3 accessible for body text?
Used as a background, Indigo 3 has a contrast ratio of 9.18:1 with black text and 2.29:1 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 Indigo 3?
The closest Pantone reference to Indigo 3 by ΔE2000 perceptual distance is Pantone 284 C (#6CACE4). 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 3?
The closest RAL Classic reference to Indigo 3 by ΔE2000 distance is RAL 7001 (Silver grey, #8F999F). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Indigo 3?
The complementary color (180° opposite on the HSL color wheel) of Indigo 3 is #FFE98F. 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.