#3F4497
Closest named color: Blueberry (#464196). oklch(43% 0.134 276.6), rgb(63, 68, 151).
Aa
White text reads best on this color (8.45:1).
About this color
#3F4497 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.134 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.012 away. White text reads best on it, at 8.45:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.48:1 |
| White text | 8.45:1 |
Values
| HEX | #3F4497 |
| RGB | rgb(63, 68, 151) |
| HSL | hsl(237, 41%, 42%) |
| OKLCH | oklch(43% 0.134 276.6) |
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 #3F4497 | 8.45:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #3F4497 | 2.48:1 | Fails | Lc 15.2 | Dividers and decoration only |
| #3F4497 text on white | 8.45:1 | AAA | Lc 88.8 | Fine for body text |
| #3F4497 text on black | 2.48:1 | Fails | Lc -13.4 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D1D7F6
oklch(88.4% 0.043 276.8)
-
Step 300
300
#B3BDF3
oklch(80.9% 0.077 276.4)
-
Step 400
400
#8D99EE
oklch(70.8% 0.125 276.6)
-
Step 500
500
#727DE8
oklch(63.2% 0.159 276.4)
-
Step 600
600
#5C63D6
oklch(55.6% 0.174 276.5)
-
Step 700
700
#4C51BA
oklch(49% 0.162 276.5)
-
Step 800
800 (this color)
#3F4497
oklch(43% 0.134 276.6)
-
Step 900
900
#343A78
oklch(37.8% 0.104 276)
-
Step 950
950
#1F2246
oklch(27% 0.066 277.4)
#3F4497 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) | #10519A | 0.050 |
| Deuteranopia (no green cones) | #004995 | 0.052 |
| Tritanopia (no blue cones) | #095767 | 0.116 |
| Achromatopsia (no color) | #4D4D4D | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4497
#3F4497
oklch(43% 0.134 276.6)
- #5E4F00
#5E4F00
oklch(43% 0.089 96.5)
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 #3F4497, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.012
- Dark Slate Blue #483D8B ΔE 0.028
- Cobalt #1E488F ΔE 0.041
- Twilight #4E518B ΔE 0.051
- Dusk Blue #26538D ΔE 0.052
- Sapphire #2138AB ΔE 0.060
- Light Navy #155084 ΔE 0.062
- Denim Blue #3B5B92 ΔE 0.065
Use #3F4497 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.