#3F5D71
Closest named color: YInMn Blue (#415A77). oklch(46.3% 0.048 238.4), rgb(63, 93, 113).
Aa
White text reads best on this color (6.96:1).
About this color
#3F5D71 is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.048 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.016 away. White text reads best on it, at 6.96:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 3.01:1 |
| White text | 6.96:1 |
Values
| HEX | #3F5D71 |
| RGB | rgb(63, 93, 113) |
| HSL | hsl(204, 28%, 35%) |
| OKLCH | oklch(46.3% 0.048 238.4) |
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 #3F5D71 | 6.96:1 | AA | Lc -89.0 | Fine for body text |
| Black text on #3F5D71 | 3.01:1 | AA large text | Lc 20.0 | Dividers and decoration only |
| #3F5D71 text on white | 6.96:1 | AA | Lc 84.1 | Fine for body text |
| #3F5D71 text on black | 3.01:1 | AA large text | Lc -17.9 | 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 700.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EBEE
oklch(93.7% 0.007 233.6)
-
Step 200
200
#D2DBE1
oklch(88.6% 0.013 236.6)
-
Step 300
300
#B3C3CE
oklch(80.8% 0.023 237.7)
-
Step 400
400
#8CA4B6
oklch(70.6% 0.038 240.5)
-
Step 500
500
#6F8EA3
oklch(63.1% 0.047 238.1)
-
Step 600
600
#57788F
oklch(55.6% 0.052 239.3)
-
Step 700
700 (this color)
#3F5D71
oklch(46.3% 0.048 238.4)
-
Step 800
800
#3A5263
oklch(42.6% 0.041 239.8)
-
Step 900
900
#324450
oklch(37.6% 0.031 237.8)
-
Step 950
950
#1E282F
oklch(27% 0.019 238.9)
#3F5D71 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) | #545C72 | 0.028 |
| Deuteranopia (no green cones) | #4D5771 | 0.025 |
| Tritanopia (no blue cones) | #2B6263 | 0.039 |
| Achromatopsia (no color) | #595959 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5D71
#3F5D71
oklch(46.3% 0.048 238.4)
- #6E523E
#6E523E
oklch(46.3% 0.049 56.7)
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 #3F5D71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.016
- Dusty Grape #545775 ΔE 0.034
- Slate #516572 ΔE 0.036
- Denim #3B638C ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.045
- Petrol #005F6A ΔE 0.046
- Dusk #4E5481 ΔE 0.047
- Dark Aqua #05696B ΔE 0.054
Use #3F5D71 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.