#3F6567
Closest named color: Slate (#516572). oklch(47.9% 0.043 200.1), rgb(63, 101, 103).
Aa
White text reads best on this color (6.42:1).
About this color
#3F6567 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 48%, its chroma 0.043 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.031 away. White text reads best on it, at 6.42:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.26:1 |
| White text | 6.42:1 |
Values
| HEX | #3F6567 |
| RGB | rgb(63, 101, 103) |
| HSL | hsl(183, 24%, 33%) |
| OKLCH | oklch(47.9% 0.043 200.1) |
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 #3F6567 | 6.42:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #3F6567 | 3.26:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #3F6567 text on white | 6.42:1 | AA | Lc 81.8 | Fine for body text |
| #3F6567 text on black | 3.26:1 | AA large text | Lc -20.0 | 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
#D1DCDC
oklch(88.6% 0.012 196.9)
-
Step 300
300
#B2C5C6
oklch(80.9% 0.021 200.6)
-
Step 400
400
#89A7A9
oklch(70.6% 0.033 201.4)
-
Step 500
500
#6B9294
oklch(63.2% 0.043 200.1)
-
Step 600
600
#527C7E
oklch(55.6% 0.047 199.7)
-
Step 700
700 (this color)
#3F6567
oklch(47.9% 0.043 200.1)
-
Step 800
800
#375557
oklch(42.7% 0.036 201.2)
-
Step 900
900
#304647
oklch(37.6% 0.027 199.6)
-
Step 950
950
#1C292A
oklch(26.9% 0.018 202.1)
#3F6567 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) | #606267 | 0.044 |
| Deuteranopia (no green cones) | #595C67 | 0.042 |
| Tritanopia (no blue cones) | #2F6865 | 0.019 |
| Achromatopsia (no color) | #5F5F5F | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F6567
#3F6567
oklch(47.9% 0.043 200.1)
- #745453
#745453
oklch(47.9% 0.043 20.8)
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 #3F6567, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.031
- Dark Aqua #05696B ΔE 0.037
- Dark Green Blue #1F6357 ΔE 0.042
- Petrol #005F6A ΔE 0.049
- Deep Turquoise #017374 ΔE 0.049
- Dark Aquamarine #017371 ΔE 0.049
- YInMn Blue #415A77 ΔE 0.050
- Dim Gray #696969 ΔE 0.060
Use #3F6567 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.