#3F4797
Closest named color: Blueberry (#464196). oklch(43.6% 0.13 275.4), rgb(63, 71, 151).
Aa
White text reads best on this color (8.20:1).
About this color
#3F4797 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.130 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.017 away. White text reads best on it, at 8.20:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.55:1 |
| White text | 8.20:1 |
Values
| HEX | #3F4797 |
| RGB | rgb(63, 71, 151) |
| HSL | hsl(235, 41%, 42%) |
| OKLCH | oklch(43.6% 0.13 275.4) |
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 #3F4797 | 8.20:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #3F4797 | 2.55:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #3F4797 text on white | 8.20:1 | AAA | Lc 88.1 | Fine for body text |
| #3F4797 text on black | 2.55:1 | Fails | Lc -14.1 | 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
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D1D8F6
oklch(88.6% 0.042 275.1)
-
Step 300
300
#B2BDF2
oklch(80.8% 0.076 275.5)
-
Step 400
400
#8B9AEC
oklch(70.8% 0.121 275)
-
Step 500
500
#707EE5
oklch(63% 0.154 275.2)
-
Step 600
600
#5A65D3
oklch(55.6% 0.167 275.3)
-
Step 700
700
#4A53B7
oklch(49.1% 0.156 275.2)
-
Step 800
800 (this color)
#3F4797
oklch(43.6% 0.13 275.4)
-
Step 900
900
#333B76
oklch(37.8% 0.1 274.8)
-
Step 950
950
#1E2345
oklch(27.1% 0.063 275.1)
#3F4797 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) | #1A539A | 0.045 |
| Deuteranopia (no green cones) | #064B95 | 0.049 |
| Tritanopia (no blue cones) | #075968 | 0.114 |
| Achromatopsia (no color) | #4F4F4F | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4797
#3F4797
oklch(43.6% 0.13 275.4)
- #615000
#615000
oklch(43.6% 0.089 94.8)
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 #3F4797, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.017
- Dark Slate Blue #483D8B ΔE 0.032
- Cobalt #1E488F ΔE 0.040
- Twilight #4E518B ΔE 0.044
- Dusk Blue #26538D ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.057
- Light Navy #155084 ΔE 0.059
- Dusk #4E5481 ΔE 0.061
Use #3F4797 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.