#3F5486
Closest named color: Dusk (#4E5481). oklch(45.2% 0.086 265.8), rgb(63, 84, 134).
Aa
White text reads best on this color (7.43:1).
About this color
#3F5486 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.086 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.022 away. White text reads best on it, at 7.43:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.82:1 |
| White text | 7.43:1 |
Values
| HEX | #3F5486 |
| RGB | rgb(63, 84, 134) |
| HSL | hsl(222, 36%, 39%) |
| OKLCH | oklch(45.2% 0.086 265.8) |
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 #3F5486 | 7.43:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #3F5486 | 2.82:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #3F5486 text on white | 7.43:1 | AAA | Lc 85.7 | Fine for body text |
| #3F5486 text on black | 2.82:1 | Fails | Lc -16.3 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D0D9EC
oklch(88.4% 0.028 265.4)
-
Step 300
300
#B1C1E2
oklch(81% 0.05 264.8)
-
Step 400
400
#89A0D4
oklch(70.8% 0.081 265.9)
-
Step 500
500
#6C88C8
oklch(63.2% 0.102 265.6)
-
Step 600
600
#5470B5
oklch(55.5% 0.113 266.1)
-
Step 700
700
#445E9C
oklch(49.1% 0.105 265.5)
-
Step 800
800 (this color)
#3F5486
oklch(45.2% 0.086 265.8)
-
Step 900
900
#304065
oklch(37.6% 0.067 265.5)
-
Step 950
950
#1C263B
oklch(27% 0.042 264.3)
#3F5486 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) | #405988 | 0.015 |
| Deuteranopia (no green cones) | #385285 | 0.011 |
| Tritanopia (no blue cones) | #1E5F66 | 0.078 |
| Achromatopsia (no color) | #555555 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5486
#3F5486
oklch(45.2% 0.086 265.8)
- #6B520F
#6B520F
oklch(45.3% 0.086 86.3)
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 #3F5486, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.022
- Light Navy Blue #2E5A88 ΔE 0.023
- Twilight #4E518B ΔE 0.024
- Denim Blue #3B5B92 ΔE 0.025
- Dusk Blue #26538D ΔE 0.029
- YInMn Blue #415A77 ΔE 0.035
- Dusky Blue #475F94 ΔE 0.039
- Dusty Grape #545775 ΔE 0.043
Use #3F5486 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.