#3F4AA4
Closest named color: Blueberry (#464196). oklch(45.1% 0.144 273.9), rgb(63, 74, 164).
Aa
White text reads best on this color (7.70:1).
About this color
#3F4AA4 is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.144 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.031 away. White text reads best on it, at 7.70:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.72:1 |
| White text | 7.70:1 |
Values
| HEX | #3F4AA4 |
| RGB | rgb(63, 74, 164) |
| HSL | hsl(233, 44%, 45%) |
| OKLCH | oklch(45.1% 0.144 273.9) |
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 #3F4AA4 | 7.70:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #3F4AA4 | 2.72:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #3F4AA4 text on white | 7.70:1 | AAA | Lc 86.4 | Fine for body text |
| #3F4AA4 text on black | 2.72:1 | Fails | Lc -15.6 | Dividers and decoration only |
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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CFD8F9
oklch(88.6% 0.047 273.4)
-
Step 300
300
#AFBDF8
oklch(80.9% 0.085 274)
-
Step 400
400
#8799F4
oklch(70.7% 0.135 274)
-
Step 500
500
#6B7DF0
oklch(63.2% 0.172 273.8)
-
Step 600
600
#5562DE
oklch(55.5% 0.187 274.1)
-
Step 700
700
#4651C1
oklch(49.2% 0.173 273.9)
-
Step 800
800 (this color)
#3F4AA4
oklch(45.1% 0.144 273.9)
-
Step 900
900
#30397C
oklch(37.6% 0.113 273.9)
-
Step 950
950
#1C2249
oklch(27% 0.072 274)
#3F4AA4 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) | #0C57A7 | 0.048 |
| Deuteranopia (no green cones) | #004FA2 | 0.048 |
| Tritanopia (no blue cones) | #005F6F | 0.124 |
| Achromatopsia (no color) | #535353 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4AA4
#3F4AA4
oklch(45.1% 0.144 273.9)
- #675400
#675400
oklch(45.2% 0.093 93.7)
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 #3F4AA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.031
- Dark Slate Blue #483D8B ΔE 0.050
- Cobalt #1E488F ΔE 0.052
- Twilight #4E518B ΔE 0.053
- Dusk Blue #26538D ΔE 0.054
- Denim Blue #3B5B92 ΔE 0.059
- Sapphire #2138AB ΔE 0.062
- Blue With A Hint Of Purple #533CC6 ΔE 0.067
Use #3F4AA4 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.