#3F4AB0
Closest named color: Blueberry (#464196). oklch(46.1% 0.161 273.6), rgb(63, 74, 176).
Aa
White text reads best on this color (7.45:1).
About this color
#3F4AB0 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.161 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.046 away. White text reads best on it, at 7.45:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.81:1 |
| White text | 7.45:1 |
Values
| HEX | #3F4AB0 |
| RGB | rgb(63, 74, 176) |
| HSL | hsl(234, 47%, 47%) |
| OKLCH | oklch(46.1% 0.161 273.6) |
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 #3F4AB0 | 7.45:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #3F4AB0 | 2.81:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #3F4AB0 text on white | 7.45:1 | AAA | Lc 85.5 | Fine for body text |
| #3F4AB0 text on black | 2.81:1 | Fails | Lc -16.5 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D0D8F7
oklch(88.6% 0.044 274)
-
Step 300
300
#B0BEF4
oklch(81% 0.078 273.3)
-
Step 400
400
#889AEE
oklch(70.7% 0.125 273.6)
-
Step 500
500
#6C7FE8
oklch(63.2% 0.158 273.3)
-
Step 600
600
#5665D7
oklch(55.6% 0.174 273.7)
-
Step 700
700 (this color)
#3F4AB0
oklch(46.1% 0.161 273.6)
-
Step 800
800
#3A4597
oklch(42.8% 0.134 273.6)
-
Step 900
900
#313B78
oklch(37.8% 0.104 273.4)
-
Step 950
950
#1D2346
oklch(27.1% 0.065 273.9)
#3F4AB0 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) | #005AB3 | 0.053 |
| Deuteranopia (no green cones) | #0050AE | 0.046 |
| Tritanopia (no blue cones) | #006375 | 0.136 |
| Achromatopsia (no color) | #555555 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4AB0
#3F4AB0
oklch(46.1% 0.161 273.6)
- #6A5600
#6A5600
oklch(46% 0.094 93.2)
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 #3F4AB0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.046
- Blue With A Hint Of Purple #533CC6 ΔE 0.052
- Blue Blue #2242C7 ΔE 0.053
- Majorelle Blue #3F37C9 ΔE 0.056
- Sapphire #2138AB ΔE 0.061
- Blurple #5539CC ΔE 0.062
- Bluey Purple #6241C7 ΔE 0.066
- Dark Slate Blue #483D8B ΔE 0.066
Use #3F4AB0 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.