#3F585D
Closest named color: Dark Slate Gray (#2F4F4F). oklch(44.2% 0.031 211.3), rgb(63, 88, 93).
Aa
White text reads best on this color (7.59:1).
About this color
#3F585D is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.031 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.041 away. White text reads best on it, at 7.59:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.76:1 |
| White text | 7.59:1 |
Values
| HEX | #3F585D |
| RGB | rgb(63, 88, 93) |
| HSL | hsl(190, 19%, 31%) |
| OKLCH | oklch(44.2% 0.031 211.3) |
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 #3F585D | 7.59:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #3F585D | 2.76:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #3F585D text on white | 7.59:1 | AAA | Lc 86.4 | Fine for body text |
| #3F585D text on black | 2.76:1 | Fails | Lc -15.7 | 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 800.
-
Step 50
50
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D2DBDD
oklch(88.5% 0.01 212.5)
-
Step 300
300
#B4C4C7
oklch(80.9% 0.018 210.2)
-
Step 400
400
#8DA6AB
oklch(70.8% 0.029 211.1)
-
Step 500
500
#709096
oklch(63.1% 0.037 210.3)
-
Step 600
600
#587A81
oklch(55.6% 0.04 211.7)
-
Step 700
700
#47676D
oklch(49.1% 0.038 210.5)
-
Step 800
800 (this color)
#3F585D
oklch(44.2% 0.031 211.3)
-
Step 900
900
#334549
oklch(37.7% 0.024 212.8)
-
Step 950
950
#1E292B
oklch(27.1% 0.016 209.9)
#3F585D 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) | #54565D | 0.030 |
| Deuteranopia (no green cones) | #4F525D | 0.028 |
| Tritanopia (no blue cones) | #355A59 | 0.016 |
| Achromatopsia (no color) | #545454 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F585D
#3F585D
oklch(44.2% 0.031 211.3)
- #634D49
#634D49
oklch(44.2% 0.031 30.2)
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 #3F585D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.041
- YInMn Blue #415A77 ΔE 0.043
- Petrol #005F6A ΔE 0.045
- Dark Green Blue #1F6357 ΔE 0.048
- Deep Teal #00555A ΔE 0.051
- Dusty Grape #545775 ΔE 0.053
- Slate #516572 ΔE 0.055
- Dark Aqua #05696B ΔE 0.058
Use #3F585D 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.