#3F1F71
Closest named color: Royal Purple (#4B006E). oklch(33.4% 0.133 296.3), rgb(63, 31, 113).
Aa
White text reads best on this color (12.75:1).
About this color
#3F1F71 is a dark, moderately saturated purple. In OKLCH its lightness is 33%, its chroma 0.133 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 0.047 away. White text reads best on it, at 12.75:1.
| Hue family | Purples |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.133) |
| Temperature | in between |
| Nearest name | Royal Purple (#4B006E) |
| Black text | 1.64:1 |
| White text | 12.75:1 |
Values
| HEX | #3F1F71 |
| RGB | rgb(63, 31, 113) |
| HSL | hsl(263, 57%, 28%) |
| OKLCH | oklch(33.4% 0.133 296.3) |
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 #3F1F71 | 12.75:1 | AAA | Lc -101.7 | Preferred for body text |
| Black text on #3F1F71 | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #3F1F71 text on white | 12.75:1 | AAA | Lc 98.3 | Preferred for body text |
| #3F1F71 text on black | 1.64:1 | 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
#EBE6FC
oklch(93.5% 0.03 296.2)
-
Step 200
200
#DCD2FA
oklch(88.4% 0.055 296.7)
-
Step 300
300
#C6B4FA
oklch(81% 0.099 295.9)
-
Step 400
400
#AB89F7
oklch(70.7% 0.159 296.4)
-
Step 500
500
#9866F4
oklch(63.1% 0.204 296.3)
-
Step 600
600
#8447E3
oklch(55.6% 0.223 296.3)
-
Step 700
700
#7037C5
oklch(49.1% 0.206 296.2)
-
Step 800
800
#5B2F9F
oklch(42.7% 0.171 296.4)
-
Step 900
900 (this color)
#3F1F71
oklch(33.4% 0.133 296.3)
-
Step 950
950
#2B1B4A
oklch(27% 0.084 296)
#3F1F71 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) | #003373 | 0.085 |
| Deuteranopia (no green cones) | #00316F | 0.085 |
| Tritanopia (no blue cones) | #323345 | 0.103 |
| Achromatopsia (no color) | #323232 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F1F71
#3F1F71
oklch(33.4% 0.133 296.3)
- #343B00
#343B00
oklch(33.4% 0.077 116.9)
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 #3F1F71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Purple #4B006E ΔE 0.047
- Indigo #4B0082 ΔE 0.049
- Midnight Blue #191970 ΔE 0.073
- Plum Purple #4E0550 ΔE 0.077
- Dark Slate Blue #483D8B ΔE 0.084
- Deep Violet #490648 ΔE 0.085
- Grape Purple #5D1451 ΔE 0.088
- Marine #042E60 ΔE 0.090
Use #3F1F71 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.