#3F4B92
Closest named color: Blueberry (#464196). oklch(44% 0.117 273.5), rgb(63, 75, 146).
Aa
White text reads best on this color (7.97:1).
About this color
#3F4B92 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.117 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.028 away. White text reads best on it, at 7.97:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.63:1 |
| White text | 7.97:1 |
Values
| HEX | #3F4B92 |
| RGB | rgb(63, 75, 146) |
| HSL | hsl(231, 40%, 41%) |
| OKLCH | oklch(44% 0.117 273.5) |
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 #3F4B92 | 7.97:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #3F4B92 | 2.63:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #3F4B92 text on white | 7.97:1 | AAA | Lc 87.5 | Fine for body text |
| #3F4B92 text on black | 2.63:1 | Fails | Lc -14.7 | Not readable |
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 800.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D1D8F3
oklch(88.5% 0.038 274.1)
-
Step 300
300
#B2BEED
oklch(80.8% 0.068 273.6)
-
Step 400
400
#8B9BE5
oklch(70.6% 0.11 273.9)
-
Step 500
500
#6F81DD
oklch(63.1% 0.14 273.4)
-
Step 600
600
#5869CB
oklch(55.7% 0.152 273.1)
-
Step 700
700
#4957AF
oklch(49.2% 0.14 273.4)
-
Step 800
800 (this color)
#3F4B92
oklch(44% 0.117 273.5)
-
Step 900
900
#333C71
oklch(37.6% 0.091 274)
-
Step 950
950
#1E2442
oklch(27.1% 0.056 273.5)
#3F4B92 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) | #2A5495 | 0.031 |
| Deuteranopia (no green cones) | #1E4D90 | 0.036 |
| Tritanopia (no blue cones) | #115B67 | 0.104 |
| Achromatopsia (no color) | #515151 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4B92
#3F4B92
oklch(44% 0.117 273.5)
- #635100
#635100
oklch(44% 0.09 94.1)
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 #3F4B92, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.028
- Twilight #4E518B ΔE 0.032
- Dusk Blue #26538D ΔE 0.035
- Dark Slate Blue #483D8B ΔE 0.038
- Cobalt #1E488F ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.045
- Dusk #4E5481 ΔE 0.048
- Light Navy #155084 ΔE 0.050
Use #3F4B92 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.