#3F616F
Closest named color: Slate (#516572). oklch(47.2% 0.045 225.8), rgb(63, 97, 111).
Aa
White text reads best on this color (6.66:1).
About this color
#3F616F is a medium-dark, muted teal or cyan. In OKLCH its lightness is 47%, its chroma 0.045 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.028 away. White text reads best on it, at 6.66:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.15:1 |
| White text | 6.66:1 |
Values
| HEX | #3F616F |
| RGB | rgb(63, 97, 111) |
| HSL | hsl(198, 28%, 34%) |
| OKLCH | oklch(47.2% 0.045 225.8) |
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 #3F616F | 6.66:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #3F616F | 3.15:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #3F616F text on white | 6.66:1 | AA | Lc 82.9 | Fine for body text |
| #3F616F text on black | 3.15:1 | AA large text | Lc -19.1 | 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
#B2C4CC
oklch(80.9% 0.023 226.2)
-
Step 400
400
#8AA6B1
oklch(70.8% 0.035 223.6)
-
Step 500
500
#6D909E
oklch(63.2% 0.044 224.4)
-
Step 600
600
#547A89
oklch(55.7% 0.049 224.6)
-
Step 700
700 (this color)
#3F616F
oklch(47.2% 0.045 225.8)
-
Step 800
800
#38535F
oklch(42.6% 0.038 227.5)
-
Step 900
900
#31454E
oklch(37.7% 0.029 227.5)
-
Step 950
950
#1D282D
oklch(26.9% 0.018 227.5)
#3F616F 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) | #595F70 | 0.035 |
| Deuteranopia (no green cones) | #525A6F | 0.031 |
| Tritanopia (no blue cones) | #2C6565 | 0.031 |
| Achromatopsia (no color) | #5C5C5C | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F616F
#3F616F
oklch(47.2% 0.045 225.8)
- #715446
#715446
oklch(47.2% 0.045 46.9)
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 #3F616F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.028
- YInMn Blue #415A77 ΔE 0.029
- Dusty Grape #545775 ΔE 0.043
- Dark Aqua #05696B ΔE 0.045
- Petrol #005F6A ΔE 0.045
- Denim #3B638C ΔE 0.046
- Dark Green Blue #1F6357 ΔE 0.054
- Light Navy Blue #2E5A88 ΔE 0.055
Use #3F616F 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.