#3F496F
Closest named color: Dark Grey Blue (#29465B). oklch(41.4% 0.065 272.1), rgb(63, 73, 111).
Aa
White text reads best on this color (8.77:1).
About this color
#3F496F is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.065 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.047 away. White text reads best on it, at 8.77:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.39:1 |
| White text | 8.77:1 |
Values
| HEX | #3F496F |
| RGB | rgb(63, 73, 111) |
| HSL | hsl(228, 28%, 34%) |
| OKLCH | oklch(41.4% 0.065 272.1) |
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 #3F496F | 8.77:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #3F496F | 2.39:1 | Fails | Lc 14.0 | Not readable |
| #3F496F text on white | 8.77:1 | AAA | Lc 90.0 | Fine for body text |
| #3F496F text on black | 2.39:1 | Fails | Lc -12.3 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D4D9E8
oklch(88.6% 0.021 271.2)
-
Step 300
300
#B8C0DA
oklch(81% 0.038 272)
-
Step 400
400
#939FC7
oklch(70.7% 0.06 271.8)
-
Step 500
500
#7987B9
oklch(63.2% 0.077 272)
-
Step 600
600
#6270A5
oklch(55.6% 0.084 272.1)
-
Step 700
700
#515E8E
oklch(49.2% 0.079 271.7)
-
Step 800
800 (this color)
#3F496F
oklch(41.4% 0.065 272.1)
-
Step 900
900
#38405D
oklch(37.7% 0.051 271.9)
-
Step 950
950
#212636
oklch(27.1% 0.031 270.8)
#3F496F 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) | #3C4D71 | 0.012 |
| Deuteranopia (no green cones) | #38496E | 0.010 |
| Tritanopia (no blue cones) | #2F5157 | 0.058 |
| Achromatopsia (no color) | #4B4B4B | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F496F
#3F496F
oklch(41.4% 0.065 272.1)
- #584A1E
#584A1E
oklch(41.3% 0.064 91.7)
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 #3F496F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.047
- Dusk #4E5481 ΔE 0.048
- YInMn Blue #415A77 ΔE 0.051
- Light Navy #155084 ΔE 0.051
- Twilight #4E518B ΔE 0.055
- Dusty Grape #545775 ΔE 0.055
- Dusk Blue #26538D ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.057
Use #3F496F 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.