#3F2783
Closest named color: Indigo (#4B0082). oklch(36.1% 0.146 289), rgb(63, 39, 131).
Aa
White text reads best on this color (11.47:1).
About this color
#3F2783 is a dark, vivid purple. In OKLCH its lightness is 36%, its chroma 0.146 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.054 away. White text reads best on it, at 11.47:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.82:1 |
| White text | 11.47:1 |
Values
| HEX | #3F2783 |
| RGB | rgb(63, 39, 131) |
| HSL | hsl(256, 54%, 33%) |
| OKLCH | oklch(36.1% 0.146 289) |
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 #3F2783 | 11.47:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #3F2783 | 1.82:1 | Fails | Lc 8.0 | Not readable |
| #3F2783 text on white | 11.47:1 | AAA | Lc 95.9 | Preferred for body text |
| #3F2783 text on black | 1.82:1 | 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
#F5F4FF
oklch(97.1% 0.015 290.3)
-
Step 100
100
#E9E7FE
oklch(93.6% 0.031 289.8)
-
Step 200
200
#D7D3FF
oklch(88.4% 0.06 289.3)
-
Step 300
300
#BEB6FF
oklch(80.9% 0.102 288.9)
-
Step 400
400
#9F8CFF
oklch(70.7% 0.164 289.1)
-
Step 500
500
#8A69FF
oklch(63.1% 0.213 288.9)
-
Step 600
600
#7746F4
oklch(55.6% 0.242 288.9)
-
Step 700
700
#6535D5
oklch(49.2% 0.226 288.9)
-
Step 800
800
#522EAC
oklch(42.7% 0.187 289)
-
Step 900
900 (this color)
#3F2783
oklch(36.1% 0.146 289)
-
Step 950
950
#271B50
oklch(27.1% 0.093 289.1)
#3F2783 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) | #003B86 | 0.076 |
| Deuteranopia (no green cones) | #003781 | 0.074 |
| Tritanopia (no blue cones) | #273E51 | 0.119 |
| Achromatopsia (no color) | #393939 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F2783
#3F2783
oklch(36.1% 0.146 289)
- #414000
#414000
oklch(36.1% 0.078 108.8)
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 #3F2783, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.057
- Imperial Purple #480CA8 ΔE 0.067
- Blueberry #464196 ΔE 0.070
- Royal Purple #4B006E ΔE 0.071
- Indigo Blue #3A18B1 ΔE 0.079
- Chrysanthemum #560BAD ΔE 0.082
- Midnight Blue #191970 ΔE 0.084
Use #3F2783 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.