#3F567F
Closest named color: YInMn Blue (#415A77). oklch(45.3% 0.073 261.5), rgb(63, 86, 127).
Aa
White text reads best on this color (7.37:1).
About this color
#3F567F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.073 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.021 away. White text reads best on it, at 7.37:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.84:1 |
| White text | 7.37:1 |
Values
| HEX | #3F567F |
| RGB | rgb(63, 86, 127) |
| HSL | hsl(218, 34%, 37%) |
| OKLCH | oklch(45.3% 0.073 261.5) |
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 #3F567F | 7.37:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #3F567F | 2.84:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #3F567F text on white | 7.37:1 | AAA | Lc 85.5 | Fine for body text |
| #3F567F text on black | 2.84:1 | Fails | Lc -16.5 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D1DAE9
oklch(88.6% 0.023 260.7)
-
Step 300
300
#B1C1DD
oklch(80.8% 0.043 261.7)
-
Step 400
400
#89A1CC
oklch(70.6% 0.069 261.9)
-
Step 500
500
#6C8ABF
oklch(63.2% 0.087 261.4)
-
Step 600
600
#5473AB
oklch(55.6% 0.095 261.7)
-
Step 700
700
#446093
oklch(49.1% 0.089 261.7)
-
Step 800
800 (this color)
#3F567F
oklch(45.3% 0.073 261.5)
-
Step 900
900
#304260
oklch(37.8% 0.057 260.3)
-
Step 950
950
#1C2738
oklch(27.1% 0.035 258.9)
#3F567F 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) | #465981 | 0.014 |
| Deuteranopia (no green cones) | #3F537E | 0.009 |
| Tritanopia (no blue cones) | #245F65 | 0.065 |
| Achromatopsia (no color) | #565656 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F567F
#3F567F
oklch(45.3% 0.073 261.5)
- #6B5221
#6B5221
oklch(45.4% 0.074 81.7)
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 #3F567F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.021
- Dusk #4E5481 ΔE 0.022
- Light Navy Blue #2E5A88 ΔE 0.023
- Denim Blue #3B5B92 ΔE 0.031
- Dusty Grape #545775 ΔE 0.034
- Twilight #4E518B ΔE 0.034
- Dusk Blue #26538D ΔE 0.038
- Denim #3B638C ΔE 0.039
Use #3F567F 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.