#3F399A
Closest named color: Blueberry (#464196). oklch(41.1% 0.153 280.1), rgb(63, 57, 154).
Aa
White text reads best on this color (9.27:1).
About this color
#3F399A is a dark, vivid purple. In OKLCH its lightness is 41%, its chroma 0.153 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.025 away. White text reads best on it, at 9.27:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.26:1 |
| White text | 9.27:1 |
Values
| HEX | #3F399A |
| RGB | rgb(63, 57, 154) |
| HSL | hsl(244, 46%, 41%) |
| OKLCH | oklch(41.1% 0.153 280.1) |
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 #3F399A | 9.27:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #3F399A | 2.26:1 | Fails | Lc 13.0 | Not readable |
| #3F399A text on white | 9.27:1 | AAA | Lc 91.0 | Preferred for body text |
| #3F399A text on black | 2.26:1 | Fails | Lc -11.4 | 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
#F4F5FE
oklch(97.2% 0.012 281.1)
-
Step 100
100
#E6E8FB
oklch(93.5% 0.026 281.1)
-
Step 200
200
#D2D6FA
oklch(88.4% 0.05 280.3)
-
Step 300
300
#B5BBFA
oklch(81% 0.089 280)
-
Step 400
400
#9095F7
oklch(70.7% 0.142 279.9)
-
Step 500
500
#7777F4
oklch(63.2% 0.182 279.8)
-
Step 600
600
#625BE2
oklch(55.5% 0.198 280)
-
Step 700
700
#524AC5
oklch(49.1% 0.185 280)
-
Step 800
800 (this color)
#3F399A
oklch(41.1% 0.153 280.1)
-
Step 900
900
#38367E
oklch(37.7% 0.118 280.3)
-
Step 950
950
#20204A
oklch(26.9% 0.076 280)
#3F399A 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) | #004B9D | 0.063 |
| Deuteranopia (no green cones) | #004398 | 0.058 |
| Tritanopia (no blue cones) | #055164 | 0.131 |
| Achromatopsia (no color) | #474747 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F399A
#3F399A
oklch(41.1% 0.153 280.1)
- #564B00
#564B00
oklch(41.1% 0.085 99.6)
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 #3F399A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.025
- Dark Slate Blue #483D8B ΔE 0.032
- Sapphire #2138AB ΔE 0.048
- Cobalt #1E488F ΔE 0.055
- Indigo Blue #3A18B1 ΔE 0.066
- Imperial Purple #480CA8 ΔE 0.069
- Rebecca Purple #663399 ΔE 0.070
- Majorelle Blue #3F37C9 ΔE 0.076
Use #3F399A 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.