#3F4DAD
Closest named color: Blueberry (#464196). oklch(46.4% 0.153 272.7), rgb(63, 77, 173).
Aa
White text reads best on this color (7.30:1).
About this color
#3F4DAD is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.153 and its hue 273°. 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 7.30:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.87:1 |
| White text | 7.30:1 |
Values
| HEX | #3F4DAD |
| RGB | rgb(63, 77, 173) |
| HSL | hsl(232, 47%, 46%) |
| OKLCH | oklch(46.4% 0.153 272.7) |
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 #3F4DAD | 7.30:1 | AAA | Lc -89.9 | Fine for body text |
| Black text on #3F4DAD | 2.87:1 | Fails | Lc 19.0 | Dividers and decoration only |
| #3F4DAD text on white | 7.30:1 | AAA | Lc 85.0 | Fine for body text |
| #3F4DAD text on black | 2.87:1 | Fails | Lc -17.0 | 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
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D0D8F5
oklch(88.5% 0.041 273.3)
-
Step 300
300
#B0BEF1
oklch(80.8% 0.074 272.7)
-
Step 400
400
#889BEA
oklch(70.7% 0.118 272.8)
-
Step 500
500
#6C80E4
oklch(63.1% 0.151 272.8)
-
Step 600
600
#5567D2
oklch(55.6% 0.165 272.7)
-
Step 700
700 (this color)
#3F4DAD
oklch(46.4% 0.153 272.7)
-
Step 800
800
#394693
oklch(42.6% 0.127 272.7)
-
Step 900
900
#313C75
oklch(37.8% 0.098 272.7)
-
Step 950
950
#1C2345
oklch(26.9% 0.064 272.7)
#3F4DAD 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) | #005BB0 | 0.050 |
| Deuteranopia (no green cones) | #0052AB | 0.045 |
| Tritanopia (no blue cones) | #006475 | 0.130 |
| Achromatopsia (no color) | #565656 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4DAD
#3F4DAD
oklch(46.4% 0.153 272.7)
- #6C5700
#6C5700
oklch(46.5% 0.095 92.5)
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 #3F4DAD, 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 0.059
- Blue Blue #2242C7 ΔE 0.060
- Twilight #4E518B ΔE 0.061
- Denim Blue #3B5B92 ΔE 0.062
- Dusk Blue #26538D ΔE 0.063
- Cobalt #1E488F ΔE 0.064
- Majorelle Blue #3F37C9 ΔE 0.064
Use #3F4DAD 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.