#3F3A9F
Closest named color: Blueberry (#464196). oklch(41.7% 0.158 279.2), rgb(63, 58, 159).
Aa
White text reads best on this color (9.06:1).
About this color
#3F3A9F is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.158 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.027 away. White text reads best on it, at 9.06:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.31:1 |
| White text | 9.06:1 |
Values
| HEX | #3F3A9F |
| RGB | rgb(63, 58, 159) |
| HSL | hsl(243, 47%, 43%) |
| OKLCH | oklch(41.7% 0.158 279.2) |
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 #3F3A9F | 9.06:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #3F3A9F | 2.31:1 | Fails | Lc 13.6 | Not readable |
| #3F3A9F text on white | 9.06:1 | AAA | Lc 90.4 | Preferred for body text |
| #3F3A9F text on black | 2.31:1 | Fails | Lc -11.9 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E6E8FC
oklch(93.5% 0.027 281.3)
-
Step 200
200
#D1D6FB
oklch(88.4% 0.051 279.2)
-
Step 300
300
#B4BBFC
oklch(81% 0.092 279.4)
-
Step 400
400
#8E94FB
oklch(70.6% 0.149 279.3)
-
Step 500
500
#7576F8
oklch(63.1% 0.189 279.2)
-
Step 600
600
#605AE7
oklch(55.5% 0.206 279.2)
-
Step 700
700
#5049C9
oklch(49.1% 0.192 279.1)
-
Step 800
800 (this color)
#3F3A9F
oklch(41.7% 0.158 279.2)
-
Step 900
900
#363681
oklch(37.8% 0.123 278.7)
-
Step 950
950
#20204B
oklch(27% 0.078 279.9)
#3F3A9F 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) | #004DA2 | 0.063 |
| Deuteranopia (no green cones) | #00459D | 0.057 |
| Tritanopia (no blue cones) | #005367 | 0.135 |
| Achromatopsia (no color) | #494949 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F3A9F
#3F3A9F
oklch(41.7% 0.158 279.2)
- #584D00
#584D00
oklch(41.8% 0.087 99.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #3F3A9F
These curated palettes and gradients contain exactly #3F3A9F. Open one to see the full color scheme around it.
Gradients
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.027
- Dark Slate Blue #483D8B ΔE 0.038
- Sapphire #2138AB ΔE 0.044
- Cobalt #1E488F ΔE 0.056
- Indigo Blue #3A18B1 ΔE 0.064
- Majorelle Blue #3F37C9 ΔE 0.067
- Imperial Purple #480CA8 ΔE 0.069
- Rebecca Purple #663399 ΔE 0.070
Use #3F3A9F 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.