#3F595C
Closest named color: Dark Slate Gray (#2F4F4F). oklch(44.4% 0.032 205), rgb(63, 89, 92).
Aa
White text reads best on this color (7.51:1).
About this color
#3F595C is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.032 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.042 away. White text reads best on it, at 7.51:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.79:1 |
| White text | 7.51:1 |
Values
| HEX | #3F595C |
| RGB | rgb(63, 89, 92) |
| HSL | hsl(186, 19%, 30%) |
| OKLCH | oklch(44.4% 0.032 205) |
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 #3F595C | 7.51:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #3F595C | 2.79:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #3F595C text on white | 7.51:1 | AAA | Lc 86.1 | Fine for body text |
| #3F595C text on black | 2.79:1 | Fails | Lc -16.0 | 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 800.
-
Step 50
50
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D2DBDC
oklch(88.5% 0.01 204.9)
-
Step 300
300
#B4C4C6
oklch(80.9% 0.018 205.8)
-
Step 400
400
#8CA6A9
oklch(70.6% 0.029 205.1)
-
Step 500
500
#6F9094
oklch(63% 0.037 205.4)
-
Step 600
600
#577B7F
oklch(55.7% 0.041 204.7)
-
Step 700
700
#47676B
oklch(49.1% 0.038 205.8)
-
Step 800
800 (this color)
#3F595C
oklch(44.4% 0.032 205)
-
Step 900
900
#324648
oklch(37.8% 0.025 203.8)
-
Step 950
950
#1E292A
oklch(27.1% 0.015 203.2)
#3F595C 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) | #55575C | 0.031 |
| Deuteranopia (no green cones) | #50535C | 0.029 |
| Tritanopia (no blue cones) | #355B5A | 0.014 |
| Achromatopsia (no color) | #545454 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F595C
#3F595C
oklch(44.4% 0.032 205)
- #644D4B
#644D4B
oklch(44.4% 0.031 24.2)
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 #3F595C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.042
- YInMn Blue #415A77 ΔE 0.045
- Petrol #005F6A ΔE 0.045
- Dark Green Blue #1F6357 ΔE 0.045
- Deep Teal #00555A ΔE 0.052
- Slate #516572 ΔE 0.054
- Dusty Grape #545775 ΔE 0.055
- Dark Aqua #05696B ΔE 0.056
Use #3F595C 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.