#3F3997
Closest named color: Blueberry (#464196). oklch(40.9% 0.149 280.4), rgb(63, 57, 151).
Aa
White text reads best on this color (9.36:1).
About this color
#3F3997 is a dark, vivid purple. In OKLCH its lightness is 41%, its chroma 0.149 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.024 away. White text reads best on it, at 9.36:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.24:1 |
| White text | 9.36:1 |
Values
| HEX | #3F3997 |
| RGB | rgb(63, 57, 151) |
| HSL | hsl(244, 45%, 41%) |
| OKLCH | oklch(40.9% 0.149 280.4) |
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 #3F3997 | 9.36:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #3F3997 | 2.24:1 | Fails | Lc 12.8 | Not readable |
| #3F3997 text on white | 9.36:1 | AAA | Lc 91.2 | Preferred for body text |
| #3F3997 text on black | 2.24:1 | Fails | Lc -11.1 | 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 800.
-
Step 50
50
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E8FB
oklch(93.5% 0.026 281.1)
-
Step 200
200
#D2D6F9
oklch(88.4% 0.048 280.2)
-
Step 300
300
#B5BBF8
oklch(80.9% 0.086 279.9)
-
Step 400
400
#9195F5
oklch(70.7% 0.139 280.4)
-
Step 500
500
#7877F1
oklch(63% 0.178 280.4)
-
Step 600
600
#635CDF
oklch(55.5% 0.193 280.4)
-
Step 700
700
#534BC2
oklch(49.1% 0.18 280.5)
-
Step 800
800 (this color)
#3F3997
oklch(40.9% 0.149 280.4)
-
Step 900
900
#38367D
oklch(37.6% 0.117 280.4)
-
Step 950
950
#212049
oklch(26.9% 0.074 281.3)
#3F3997 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) | #004A9A | 0.063 |
| Deuteranopia (no green cones) | #004395 | 0.058 |
| Tritanopia (no blue cones) | #0D5062 | 0.128 |
| Achromatopsia (no color) | #474747 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F3997
#3F3997
oklch(40.9% 0.149 280.4)
- #554B00
#554B00
oklch(41% 0.085 100.6)
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 #3F3997, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.024
- Dark Slate Blue #483D8B ΔE 0.028
- Sapphire #2138AB ΔE 0.051
- Cobalt #1E488F ΔE 0.053
- Indigo Blue #3A18B1 ΔE 0.069
- Rebecca Purple #663399 ΔE 0.070
- Imperial Purple #480CA8 ΔE 0.071
- Dusk Blue #26538D ΔE 0.075
Use #3F3997 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.