#3F489A
Closest named color: Blueberry (#464196). oklch(44% 0.133 274.9), rgb(63, 72, 154).
Aa
White text reads best on this color (8.06:1).
About this color
#3F489A is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.133 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.020 away. White text reads best on it, at 8.06:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.60:1 |
| White text | 8.06:1 |
Values
| HEX | #3F489A |
| RGB | rgb(63, 72, 154) |
| HSL | hsl(234, 42%, 43%) |
| OKLCH | oklch(44% 0.133 274.9) |
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 #3F489A | 8.06:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #3F489A | 2.60:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #3F489A text on white | 8.06:1 | AAA | Lc 87.7 | Fine for body text |
| #3F489A text on black | 2.60:1 | Fails | Lc -14.5 | 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
#D0D8F6
oklch(88.6% 0.042 273.7)
-
Step 300
300
#B1BDF3
oklch(80.8% 0.078 274.8)
-
Step 400
400
#8A9AED
oklch(70.8% 0.123 274.5)
-
Step 500
500
#6F7EE8
oklch(63.2% 0.159 274.9)
-
Step 600
600
#5965D6
oklch(55.7% 0.172 274.8)
-
Step 700
700
#4953B9
oklch(49.1% 0.159 274.7)
-
Step 800
800 (this color)
#3F489A
oklch(44% 0.133 274.9)
-
Step 900
900
#333A77
oklch(37.6% 0.103 275.4)
-
Step 950
950
#1D2346
oklch(27.1% 0.065 273.9)
#3F489A 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) | #19549D | 0.044 |
| Deuteranopia (no green cones) | #014C98 | 0.050 |
| Tritanopia (no blue cones) | #005B6A | 0.117 |
| Achromatopsia (no color) | #505050 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F489A
#3F489A
oklch(44% 0.133 274.9)
- #625100
#625100
oklch(43.9% 0.09 95)
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 #3F489A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.020
- Dark Slate Blue #483D8B ΔE 0.037
- Cobalt #1E488F ΔE 0.042
- Twilight #4E518B ΔE 0.045
- Dusk Blue #26538D ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.056
- Light Navy #155084 ΔE 0.061
- Dusk #4E5481 ΔE 0.063
Use #3F489A 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.