#3F43A2
Closest named color: Blueberry (#464196). oklch(43.6% 0.151 276.4), rgb(63, 67, 162).
Aa
White text reads best on this color (8.28:1).
About this color
#3F43A2 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.151 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.022 away. White text reads best on it, at 8.28:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.53:1 |
| White text | 8.28:1 |
Values
| HEX | #3F43A2 |
| RGB | rgb(63, 67, 162) |
| HSL | hsl(238, 44%, 44%) |
| OKLCH | oklch(43.6% 0.151 276.4) |
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 #3F43A2 | 8.28:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #3F43A2 | 2.53:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #3F43A2 text on white | 8.28:1 | AAA | Lc 88.2 | Fine for body text |
| #3F43A2 text on black | 2.53:1 | Fails | Lc -13.9 | 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
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#D0D7FA
oklch(88.5% 0.049 276.4)
-
Step 300
300
#B1BCFA
oklch(80.9% 0.089 276.4)
-
Step 400
400
#8A97F7
oklch(70.7% 0.141 276.3)
-
Step 500
500
#6F7AF4
oklch(63.2% 0.18 276.1)
-
Step 600
600
#5A5FE2
oklch(55.6% 0.195 276.3)
-
Step 700
700
#4A4DC5
oklch(49% 0.183 276.2)
-
Step 800
800 (this color)
#3F43A2
oklch(43.6% 0.151 276.4)
-
Step 900
900
#33387E
oklch(37.7% 0.117 276.2)
-
Step 950
950
#1E214A
oklch(27% 0.075 277)
#3F43A2 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) | #0053A5 | 0.057 |
| Deuteranopia (no green cones) | #004AA0 | 0.051 |
| Tritanopia (no blue cones) | #005A6C | 0.129 |
| Achromatopsia (no color) | #4E4E4E | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F43A2
#3F43A2
oklch(43.6% 0.151 276.4)
- #605100
#605100
oklch(43.7% 0.09 96.7)
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 #3F43A2, closest first.
No curated palette has a color within ΔE 0.04 of #3F43A2.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.022
- Dark Slate Blue #483D8B ΔE 0.041
- Cobalt #1E488F ΔE 0.051
- Sapphire #2138AB ΔE 0.051
- Twilight #4E518B ΔE 0.062
- Dusk Blue #26538D ΔE 0.062
- Blue With A Hint Of Purple #533CC6 ΔE 0.066
- Majorelle Blue #3F37C9 ΔE 0.066
Use #3F43A2 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.