#3F6563
Closest named color: Slate (#516572). oklch(47.8% 0.043 191.6), rgb(63, 101, 99).
Aa
White text reads best on this color (6.45:1).
About this color
#3F6563 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 48%, its chroma 0.043 and its hue 192°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.035 away. White text reads best on it, at 6.45:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.25:1 |
| White text | 6.45:1 |
Values
| HEX | #3F6563 |
| RGB | rgb(63, 101, 99) |
| HSL | hsl(177, 23%, 32%) |
| OKLCH | oklch(47.8% 0.043 191.6) |
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 #3F6563 | 6.45:1 | AA | Lc -87.1 | Fine for body text |
| Black text on #3F6563 | 3.25:1 | AA large text | Lc 22.1 | Dividers and decoration only |
| #3F6563 text on white | 6.45:1 | AA | Lc 82.0 | Fine for body text |
| #3F6563 text on black | 3.25:1 | AA large text | Lc -19.9 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEB
oklch(93.6% 0.006 197)
-
Step 200
200
#D1DCDB
oklch(88.6% 0.012 190.4)
-
Step 300
300
#B2C5C4
oklch(80.9% 0.021 192.9)
-
Step 400
400
#89A8A6
oklch(70.8% 0.034 191.6)
-
Step 500
500
#6B9290
oklch(63.1% 0.043 192.2)
-
Step 600
600
#527C7A
oklch(55.5% 0.047 192.1)
-
Step 700
700 (this color)
#3F6563
oklch(47.8% 0.043 191.6)
-
Step 800
800
#375554
oklch(42.6% 0.036 193.2)
-
Step 900
900
#304645
oklch(37.6% 0.027 192.5)
-
Step 950
950
#1C2929
oklch(26.9% 0.018 196.1)
#3F6563 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) | #616163 | 0.046 |
| Deuteranopia (no green cones) | #5A5C63 | 0.043 |
| Tritanopia (no blue cones) | #306764 | 0.015 |
| Achromatopsia (no color) | #5E5E5E | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F6563
#3F6563
oklch(47.8% 0.043 191.6)
- #735357
#735357
oklch(47.7% 0.043 10.5)
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 #3F6563, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.035
- Dark Aqua #05696B ΔE 0.037
- Dark Green Blue #1F6357 ΔE 0.038
- Dark Aquamarine #017371 ΔE 0.049
- Deep Turquoise #017374 ΔE 0.050
- Petrol #005F6A ΔE 0.050
- YInMn Blue #415A77 ΔE 0.055
- Dim Gray #696969 ΔE 0.061
Use #3F6563 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.