#3F4DA8
Closest named color: Blueberry (#464196). oklch(46% 0.146 272.7), rgb(63, 77, 168).
Aa
White text reads best on this color (7.39:1).
About this color
#3F4DA8 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.146 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.040 away. White text reads best on it, at 7.39:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.83:1 |
| White text | 7.39:1 |
Values
| HEX | #3F4DA8 |
| RGB | rgb(63, 77, 168) |
| HSL | hsl(232, 45%, 45%) |
| OKLCH | oklch(46% 0.146 272.7) |
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 #3F4DA8 | 7.39:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #3F4DA8 | 2.83:1 | Fails | Lc 18.6 | Dividers and decoration only |
| #3F4DA8 text on white | 7.39:1 | AAA | Lc 85.4 | Fine for body text |
| #3F4DA8 text on black | 2.83:1 | Fails | Lc -16.6 | 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 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
#D0D8F4
oklch(88.5% 0.04 272.9)
-
Step 300
300
#B1BEEF
oklch(80.8% 0.071 273.1)
-
Step 400
400
#899BE7
oklch(70.6% 0.113 273)
-
Step 500
500
#6D81E0
oklch(63.1% 0.144 272.7)
-
Step 600
600
#5668CE
oklch(55.6% 0.158 272.7)
-
Step 700
700 (this color)
#3F4DA8
oklch(46% 0.146 272.7)
-
Step 800
800
#3A4790
oklch(42.7% 0.121 272.7)
-
Step 900
900
#313C73
oklch(37.6% 0.095 272.6)
-
Step 950
950
#1D2443
oklch(27.1% 0.058 272.4)
#3F4DA8 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) | #115AAB | 0.046 |
| Deuteranopia (no green cones) | #0051A6 | 0.046 |
| Tritanopia (no blue cones) | #006273 | 0.124 |
| Achromatopsia (no color) | #555555 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4DA8
#3F4DA8
oklch(46% 0.146 272.7)
- #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 #3F4DA8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.040
- Twilight #4E518B ΔE 0.054
- Dusk Blue #26538D ΔE 0.056
- Denim Blue #3B5B92 ΔE 0.056
- Cobalt #1E488F ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.059
- Blue With A Hint Of Purple #533CC6 ΔE 0.065
- Dusky Blue #475F94 ΔE 0.065
Use #3F4DA8 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.