#3F2374
Closest named color: Indigo (#4B0082). oklch(34.2% 0.131 294.2), rgb(63, 35, 116).
Aa
White text reads best on this color (12.32:1).
About this color
#3F2374 is a dark, moderately saturated purple. In OKLCH its lightness is 34%, its chroma 0.131 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.052 away. White text reads best on it, at 12.32:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.131) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.70:1 |
| White text | 12.32:1 |
Values
| HEX | #3F2374 |
| RGB | rgb(63, 35, 116) |
| HSL | hsl(261, 54%, 30%) |
| OKLCH | oklch(34.2% 0.131 294.2) |
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 #3F2374 | 12.32:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #3F2374 | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #3F2374 text on white | 12.32:1 | AAA | Lc 97.6 | Preferred for body text |
| #3F2374 text on black | 1.70:1 | 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
#EAE7FC
oklch(93.7% 0.028 292.4)
-
Step 200
200
#DBD3FB
oklch(88.6% 0.055 294.4)
-
Step 300
300
#C4B4FA
oklch(80.8% 0.099 294.6)
-
Step 400
400
#A78AF8
oklch(70.6% 0.158 294.1)
-
Step 500
500
#9468F5
oklch(63.1% 0.202 294.2)
-
Step 600
600
#804AE3
oklch(55.6% 0.219 294.4)
-
Step 700
700
#6C39C5
oklch(49% 0.204 294.2)
-
Step 800
800
#5831A0
oklch(42.7% 0.169 294.2)
-
Step 900
900 (this color)
#3F2374
oklch(34.2% 0.131 294.2)
-
Step 950
950
#2A1C4A
oklch(27.1% 0.082 294.3)
#3F2374 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) | #003576 | 0.081 |
| Deuteranopia (no green cones) | #003372 | 0.081 |
| Tritanopia (no blue cones) | #303648 | 0.103 |
| Achromatopsia (no color) | #353535 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F2374
#3F2374
oklch(34.2% 0.131 294.2)
- #383C00
#383C00
oklch(34.1% 0.077 113.9)
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 #3F2374, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.052
- Royal Purple #4B006E ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.075
- Midnight Blue #191970 ΔE 0.075
- Plum Purple #4E0550 ΔE 0.084
- Marine Blue #01386A ΔE 0.088
- Marine #042E60 ΔE 0.089
- Prussian Blue #1D3557 ΔE 0.089
Use #3F2374 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.