#3F2379
Closest named color: Indigo (#4B0082). oklch(34.6% 0.138 292.7), rgb(63, 35, 121).
Aa
White text reads best on this color (12.15:1).
About this color
#3F2379 is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.138 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.049 away. White text reads best on it, at 12.15:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.138) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.72:1 |
| White text | 12.15:1 |
Values
| HEX | #3F2379 |
| RGB | rgb(63, 35, 121) |
| HSL | hsl(260, 55%, 31%) |
| OKLCH | oklch(34.6% 0.138 292.7) |
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 #3F2379 | 12.15:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #3F2379 | 1.72:1 | Fails | Lc 0.0 | Not readable |
| #3F2379 text on white | 12.15:1 | AAA | Lc 97.2 | Preferred for body text |
| #3F2379 text on black | 1.72:1 | 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
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#EAE7FD
oklch(93.7% 0.03 292.1)
-
Step 200
200
#DAD3FD
oklch(88.6% 0.058 292.8)
-
Step 300
300
#C2B4FE
oklch(80.8% 0.104 292.6)
-
Step 400
400
#A58AFD
oklch(70.7% 0.164 292.5)
-
Step 500
500
#9267FB
oklch(63.2% 0.211 292.7)
-
Step 600
600
#7E47EA
oklch(55.6% 0.23 292.8)
-
Step 700
700
#6B37CC
oklch(49.2% 0.214 292.7)
-
Step 800
800
#572FA5
oklch(42.8% 0.178 292.8)
-
Step 900
900 (this color)
#3F2379
oklch(34.6% 0.138 292.7)
-
Step 950
950
#291B4C
oklch(27% 0.087 292.8)
#3F2379 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) | #00377C | 0.081 |
| Deuteranopia (no green cones) | #003477 | 0.080 |
| Tritanopia (no blue cones) | #2E384B | 0.108 |
| Achromatopsia (no color) | #363636 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F2379
#3F2379
oklch(34.6% 0.138 292.7)
- #3A3D00
#3A3D00
oklch(34.5% 0.077 112.9)
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 #3F2379, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.049
- Royal Purple #4B006E ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.071
- Midnight Blue #191970 ΔE 0.076
- Imperial Purple #480CA8 ΔE 0.081
- Blueberry #464196 ΔE 0.086
- Marine Blue #01386A ΔE 0.090
- Plum Purple #4E0550 ΔE 0.091
Use #3F2379 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.