#3F48A2
Closest named color: Blueberry (#464196). oklch(44.6% 0.144 274.7), rgb(63, 72, 162).
Aa
White text reads best on this color (7.89:1).
About this color
#3F48A2 is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.144 and its hue 275°. 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 7.89:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.66:1 |
| White text | 7.89:1 |
Values
| HEX | #3F48A2 |
| RGB | rgb(63, 72, 162) |
| HSL | hsl(235, 44%, 44%) |
| OKLCH | oklch(44.6% 0.144 274.7) |
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 #3F48A2 | 7.89:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #3F48A2 | 2.66:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #3F48A2 text on white | 7.89:1 | AAA | Lc 87.1 | Fine for body text |
| #3F48A2 text on black | 2.66:1 | Fails | Lc -15.0 | 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 800.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#CFD7F9
oklch(88.4% 0.048 274.9)
-
Step 300
300
#B0BDF8
oklch(80.9% 0.085 274.7)
-
Step 400
400
#8899F4
oklch(70.8% 0.134 274.4)
-
Step 500
500
#6D7CF0
oklch(63.1% 0.173 274.8)
-
Step 600
600
#5762DE
oklch(55.6% 0.187 274.7)
-
Step 700
700
#4750C1
oklch(49.1% 0.174 274.5)
-
Step 800
800 (this color)
#3F48A2
oklch(44.6% 0.144 274.7)
-
Step 900
900
#31397C
oklch(37.6% 0.113 274.5)
-
Step 950
950
#1D2249
oklch(27% 0.072 275)
#3F48A2 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) | #0656A5 | 0.052 |
| Deuteranopia (no green cones) | #004DA0 | 0.049 |
| Tritanopia (no blue cones) | #005D6E | 0.123 |
| Achromatopsia (no color) | #515151 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F48A2
#3F48A2
oklch(44.6% 0.144 274.7)
- #645300
#645300
oklch(44.6% 0.092 95.3)
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 #3F48A2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.026
- Dark Slate Blue #483D8B ΔE 0.045
- Cobalt #1E488F ΔE 0.050
- Twilight #4E518B ΔE 0.053
- Dusk Blue #26538D ΔE 0.055
- Sapphire #2138AB ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.068
Use #3F48A2 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.