#3F4B97
Closest named color: Blueberry (#464196). oklch(44.4% 0.124 273.5), rgb(63, 75, 151).
Aa
White text reads best on this color (7.88:1).
About this color
#3F4B97 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.124 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.026 away. White text reads best on it, at 7.88:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.66:1 |
| White text | 7.88:1 |
Values
| HEX | #3F4B97 |
| RGB | rgb(63, 75, 151) |
| HSL | hsl(232, 41%, 42%) |
| OKLCH | oklch(44.4% 0.124 273.5) |
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 #3F4B97 | 7.88:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #3F4B97 | 2.66:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #3F4B97 text on white | 7.88:1 | AAA | Lc 87.1 | Fine for body text |
| #3F4B97 text on black | 2.66:1 | Fails | Lc -15.0 | 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
#D0D8F5
oklch(88.5% 0.041 273.3)
-
Step 300
300
#B1BEF0
oklch(80.9% 0.072 273.3)
-
Step 400
400
#8A9BE9
oklch(70.8% 0.116 273.7)
-
Step 500
500
#6E80E2
oklch(63.1% 0.148 273.6)
-
Step 600
600
#5767D0
oklch(55.6% 0.161 273.5)
-
Step 700
700
#4855B4
oklch(49.1% 0.15 273.7)
-
Step 800
800 (this color)
#3F4B97
oklch(44.4% 0.124 273.5)
-
Step 900
900
#323C74
oklch(37.8% 0.096 273.3)
-
Step 950
950
#1D2344
oklch(26.9% 0.062 273.8)
#3F4B97 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) | #25559A | 0.035 |
| Deuteranopia (no green cones) | #164E95 | 0.040 |
| Tritanopia (no blue cones) | #065C6A | 0.109 |
| Achromatopsia (no color) | #515151 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4B97
#3F4B97
oklch(44.4% 0.124 273.5)
- #655200
#655200
oklch(44.5% 0.091 93.4)
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 #3F4B97, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.026
- Twilight #4E518B ΔE 0.036
- Dusk Blue #26538D ΔE 0.039
- Dark Slate Blue #483D8B ΔE 0.040
- Cobalt #1E488F ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.047
- Dusk #4E5481 ΔE 0.054
- Light Navy #155084 ΔE 0.055
Use #3F4B97 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.