#3F50A4
Closest named color: Blueberry (#464196). oklch(46.3% 0.136 271.5), rgb(63, 80, 164).
Aa
White text reads best on this color (7.25:1).
About this color
#3F50A4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.136 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.043 away. White text reads best on it, at 7.25:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.89:1 |
| White text | 7.25:1 |
Values
| HEX | #3F50A4 |
| RGB | rgb(63, 80, 164) |
| HSL | hsl(230, 44%, 45%) |
| OKLCH | oklch(46.3% 0.136 271.5) |
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 #3F50A4 | 7.25:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #3F50A4 | 2.89:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #3F50A4 text on white | 7.25:1 | AAA | Lc 84.9 | Fine for body text |
| #3F50A4 text on black | 2.89:1 | Fails | Lc -17.1 | 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
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D0D8F2
oklch(88.4% 0.037 272)
-
Step 300
300
#B1BFEC
oklch(80.9% 0.066 271.4)
-
Step 400
400
#899DE3
oklch(70.8% 0.105 271.3)
-
Step 500
500
#6D83DB
oklch(63.2% 0.135 271.5)
-
Step 600
600
#566AC8
oklch(55.6% 0.147 271.8)
-
Step 700
700 (this color)
#3F50A4
oklch(46.3% 0.136 271.5)
-
Step 800
800
#3A488C
oklch(42.6% 0.113 272)
-
Step 900
900
#313D70
oklch(37.6% 0.088 271.6)
-
Step 950
950
#1D2442
oklch(27% 0.057 272.2)
#3F50A4 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) | #225BA7 | 0.037 |
| Deuteranopia (no green cones) | #0953A2 | 0.043 |
| Tritanopia (no blue cones) | #006372 | 0.117 |
| Achromatopsia (no color) | #575757 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F50A4
#3F50A4
oklch(46.3% 0.136 271.5)
- #6C5600
#6C5600
oklch(46.2% 0.095 91.5)
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 #3F50A4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.043
- Twilight #4E518B ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.046
- Dusk Blue #26538D ΔE 0.049
- Dusky Blue #475F94 ΔE 0.055
- Cobalt #1E488F ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.060
- Light Navy Blue #2E5A88 ΔE 0.061
Use #3F50A4 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.