#3F5463
Closest named color: YInMn Blue (#415A77). oklch(43.5% 0.036 239.7), rgb(63, 84, 99).
Aa
White text reads best on this color (7.89:1).
About this color
#3F5463 is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.036 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.034 away. White text reads best on it, at 7.89:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.65:1 |
| White text | 7.89:1 |
Values
| HEX | #3F5463 |
| RGB | rgb(63, 84, 99) |
| HSL | hsl(205, 22%, 32%) |
| OKLCH | oklch(43.5% 0.036 239.7) |
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 #3F5463 | 7.89:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #3F5463 | 2.65:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #3F5463 text on white | 7.89:1 | AAA | Lc 87.4 | Fine for body text |
| #3F5463 text on black | 2.65:1 | Fails | Lc -14.8 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAED
oklch(93.5% 0.006 239.8)
-
Step 200
200
#D2DAE0
oklch(88.4% 0.012 239.9)
-
Step 300
300
#B5C3CD
oklch(80.9% 0.021 238.7)
-
Step 400
400
#8EA4B4
oklch(70.7% 0.034 239.6)
-
Step 500
500
#728DA1
oklch(63% 0.043 240.4)
-
Step 600
600
#5A778C
oklch(55.5% 0.047 240.1)
-
Step 700
700
#4A6477
oklch(49% 0.043 240.5)
-
Step 800
800 (this color)
#3F5463
oklch(43.5% 0.036 239.7)
-
Step 900
900
#34444F
oklch(37.7% 0.028 238.5)
-
Step 950
950
#1F282E
oklch(27.1% 0.017 237.4)
#3F5463 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) | #4E5464 | 0.022 |
| Deuteranopia (no green cones) | #495063 | 0.018 |
| Tritanopia (no blue cones) | #335859 | 0.029 |
| Achromatopsia (no color) | #515151 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5463
#3F5463
oklch(43.5% 0.036 239.7)
- #604D3D
#604D3D
oklch(43.5% 0.036 61.8)
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 #3F5463, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.034
- Dark Slate Gray #2F4F4F ΔE 0.042
- Dusty Grape #545775 ΔE 0.045
- Petrol #005F6A ΔE 0.050
- Deep Teal #00555A ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.056
- Dusk #4E5481 ΔE 0.056
- Light Navy Blue #2E5A88 ΔE 0.060
Use #3F5463 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.