#3F606D
Closest named color: YInMn Blue (#415A77). oklch(46.9% 0.044 224.7), rgb(63, 96, 109).
Aa
White text reads best on this color (6.76:1).
About this color
#3F606D is a medium-dark, muted teal or cyan. In OKLCH its lightness is 47%, its chroma 0.044 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.029 away. White text reads best on it, at 6.76:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 3.10:1 |
| White text | 6.76:1 |
Values
| HEX | #3F606D |
| RGB | rgb(63, 96, 109) |
| HSL | hsl(197, 27%, 34%) |
| OKLCH | oklch(46.9% 0.044 224.7) |
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 #3F606D | 6.76:1 | AA | Lc -88.3 | Fine for body text |
| Black text on #3F606D | 3.10:1 | AA large text | Lc 20.8 | Dividers and decoration only |
| #3F606D text on white | 6.76:1 | AA | Lc 83.3 | Fine for body text |
| #3F606D text on black | 3.10:1 | AA large text | Lc -18.7 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E6EBED
oklch(93.7% 0.006 223.5)
-
Step 200
200
#D1DBDF
oklch(88.5% 0.012 223.5)
-
Step 300
300
#B3C4CB
oklch(80.9% 0.021 224.4)
-
Step 400
400
#8BA6B1
oklch(70.8% 0.034 224.4)
-
Step 500
500
#6E909D
oklch(63.2% 0.043 223.3)
-
Step 600
600
#557A88
oklch(55.7% 0.047 223.5)
-
Step 700
700 (this color)
#3F606D
oklch(46.9% 0.044 224.7)
-
Step 800
800
#39535E
oklch(42.6% 0.036 226.1)
-
Step 900
900
#31454D
oklch(37.7% 0.029 224.6)
-
Step 950
950
#1D282D
oklch(26.9% 0.018 227.5)
#3F606D 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) | #595E6E | 0.035 |
| Deuteranopia (no green cones) | #52596D | 0.031 |
| Tritanopia (no blue cones) | #2D6464 | 0.029 |
| Achromatopsia (no color) | #5B5B5B | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F606D
#3F606D
oklch(46.9% 0.044 224.7)
- #705346
#705346
oklch(46.9% 0.044 45.2)
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 #3F606D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.029
- Slate #516572 ΔE 0.030
- Dusty Grape #545775 ΔE 0.043
- Petrol #005F6A ΔE 0.044
- Dark Aqua #05696B ΔE 0.045
- Denim #3B638C ΔE 0.049
- Dark Green Blue #1F6357 ΔE 0.053
- Light Navy Blue #2E5A88 ΔE 0.056
Use #3F606D 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.