#3F2580
Closest named color: Indigo (#4B0082). oklch(35.6% 0.144 290.2), rgb(63, 37, 128).
Aa
White text reads best on this color (11.74:1).
About this color
#3F2580 is a dark, vivid purple. In OKLCH its lightness is 36%, its chroma 0.144 and its hue 290°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.050 away. White text reads best on it, at 11.74:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | vivid (0.144) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.78:1 |
| White text | 11.74:1 |
Values
| HEX | #3F2580 |
| RGB | rgb(63, 37, 128) |
| HSL | hsl(257, 55%, 32%) |
| OKLCH | oklch(35.6% 0.144 290.2) |
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 #3F2580 | 11.74:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #3F2580 | 1.78:1 | Fails | Lc 7.5 | Not readable |
| #3F2580 text on white | 11.74:1 | AAA | Lc 96.4 | Preferred for body text |
| #3F2580 text on black | 1.78:1 | 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
#D8D3FF
oklch(88.5% 0.06 290.3)
-
Step 300
300
#BFB5FF
oklch(80.8% 0.104 290.1)
-
Step 400
400
#A18BFF
oklch(70.7% 0.166 290.2)
-
Step 500
500
#8D68FF
oklch(63.2% 0.214 290.2)
-
Step 600
600
#7A45F2
oklch(55.6% 0.241 290.3)
-
Step 700
700
#6734D3
oklch(49.1% 0.224 290.2)
-
Step 800
800
#542EAA
oklch(42.8% 0.185 290.4)
-
Step 900
900 (this color)
#3F2580
oklch(35.6% 0.144 290.2)
-
Step 950
950
#281B4F
oklch(27.1% 0.091 290.5)
#3F2580 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) | #003A83 | 0.079 |
| Deuteranopia (no green cones) | #00367E | 0.077 |
| Tritanopia (no blue cones) | #293C4F | 0.117 |
| Achromatopsia (no color) | #383838 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F2580
#3F2580
oklch(35.6% 0.144 290.2)
- #3F3F00
#3F3F00
oklch(35.6% 0.078 109.8)
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 #3F2580, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.050
- Dark Slate Blue #483D8B ΔE 0.063
- Royal Purple #4B006E ΔE 0.066
- Imperial Purple #480CA8 ΔE 0.071
- Blueberry #464196 ΔE 0.076
- Midnight Blue #191970 ΔE 0.080
- Indigo Blue #3A18B1 ΔE 0.083
- Chrysanthemum #560BAD ΔE 0.086
Use #3F2580 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.