#3F2171
Closest named color: Royal Purple (#4B006E). oklch(33.7% 0.13 295.8), rgb(63, 33, 113).
Aa
White text reads best on this color (12.59:1).
About this color
#3F2171 is a dark, moderately saturated purple. In OKLCH its lightness is 34%, its chroma 0.130 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Royal Purple (#4B006E), ΔE 0.050 away. White text reads best on it, at 12.59:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.130) |
| Temperature | in between |
| Nearest name | Royal Purple (#4B006E) |
| Black text | 1.66:1 |
| White text | 12.59:1 |
Values
| HEX | #3F2171 |
| RGB | rgb(63, 33, 113) |
| HSL | hsl(263, 55%, 29%) |
| OKLCH | oklch(33.7% 0.13 295.8) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #3F2171 | 12.59:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #3F2171 | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #3F2171 text on white | 12.59:1 | AAA | Lc 98.0 | Preferred for body text |
| #3F2171 text on black | 1.66:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 900.
-
Step 50
50
#F6F4FE
oklch(97.2% 0.013 295.3)
-
Step 100
100
#EBE6FB
oklch(93.5% 0.029 296.7)
-
Step 200
200
#DCD3FA
oklch(88.6% 0.054 295.9)
-
Step 300
300
#C6B4F9
oklch(80.9% 0.098 296.1)
-
Step 400
400
#AA8AF6
oklch(70.8% 0.156 295.8)
-
Step 500
500
#9767F2
oklch(63% 0.2 296.1)
-
Step 600
600
#8249E1
oklch(55.5% 0.218 295.6)
-
Step 700
700
#6F39C3
oklch(49.1% 0.202 296)
-
Step 800
800
#5A319E
oklch(42.8% 0.167 295.8)
-
Step 900
900 (this color)
#3F2171
oklch(33.7% 0.13 295.8)
-
Step 950
950
#2B1B49
oklch(26.9% 0.082 296.5)
#3F2171 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #003473 | 0.084 |
| Deuteranopia (no green cones) | #00326F | 0.083 |
| Tritanopia (no blue cones) | #323446 | 0.100 |
| Achromatopsia (no color) | #333333 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F2171
#3F2171
oklch(33.7% 0.13 295.8)
- #363B00
#363B00
oklch(33.6% 0.076 115)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #3F2171, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Purple #4B006E ΔE 0.050
- Indigo #4B0082 ΔE 0.051
- Midnight Blue #191970 ΔE 0.074
- Plum Purple #4E0550 ΔE 0.079
- Dark Slate Blue #483D8B ΔE 0.081
- Deep Violet #490648 ΔE 0.087
- Grape Purple #5D1451 ΔE 0.088
- Marine #042E60 ΔE 0.088
Use #3F2171 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.