#3F4FAD
Closest named color: Blueberry (#464196). oklch(46.8% 0.15 272), rgb(63, 79, 173).
Aa
White text reads best on this color (7.15:1).
About this color
#3F4FAD is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.150 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.049 away. White text reads best on it, at 7.15:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.93:1 |
| White text | 7.15:1 |
Values
| HEX | #3F4FAD |
| RGB | rgb(63, 79, 173) |
| HSL | hsl(231, 47%, 46%) |
| OKLCH | oklch(46.8% 0.15 272) |
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 #3F4FAD | 7.15:1 | AAA | Lc -89.4 | Fine for body text |
| Black text on #3F4FAD | 2.93:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #3F4FAD text on white | 7.15:1 | AAA | Lc 84.5 | Fine for body text |
| #3F4FAD text on black | 2.93:1 | Fails | Lc -17.5 | 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 700.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#CFD8F5
oklch(88.4% 0.041 271.9)
-
Step 300
300
#B0BEF0
oklch(80.8% 0.073 272.5)
-
Step 400
400
#879BE9
oklch(70.6% 0.117 272.2)
-
Step 500
500
#6B81E3
oklch(63.2% 0.149 272)
-
Step 600
600
#5468D0
oklch(55.6% 0.161 272)
-
Step 700
700 (this color)
#3F4FAD
oklch(46.8% 0.15 272)
-
Step 800
800
#384792
oklch(42.7% 0.124 271.7)
-
Step 900
900
#303C74
oklch(37.6% 0.096 271.9)
-
Step 950
950
#1C2444
oklch(27.1% 0.06 271.3)
#3F4FAD 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) | #0E5DB0 | 0.047 |
| Deuteranopia (no green cones) | #0053AB | 0.045 |
| Tritanopia (no blue cones) | #006576 | 0.127 |
| Achromatopsia (no color) | #585858 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4FAD
#3F4FAD
oklch(46.8% 0.15 272)
- #6E5800
#6E5800
oklch(46.9% 0.096 91.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #3F4FAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.049
- Denim Blue #3B5B92 ΔE 0.059
- Twilight #4E518B ΔE 0.060
- Dusk Blue #26538D ΔE 0.062
- Blue With A Hint Of Purple #533CC6 ΔE 0.062
- Blue Blue #2242C7 ΔE 0.063
- Cobalt #1E488F ΔE 0.065
- Dusky Blue #475F94 ΔE 0.066
Use #3F4FAD 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.