#3F574E
Closest named color: Dark Slate Gray (#2F4F4F). oklch(43.4% 0.033 169.7), rgb(63, 87, 78).
Aa
White text reads best on this color (7.82:1).
About this color
#3F574E is a dark, muted green. In OKLCH its lightness is 43%, its chroma 0.033 and its hue 170°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.035 away. White text reads best on it, at 7.82:1.
| Hue family | Greens |
| Lightness | dark (43%) |
| Chroma | muted (0.033) |
| Temperature | in between |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.68:1 |
| White text | 7.82:1 |
Values
| HEX | #3F574E |
| RGB | rgb(63, 87, 78) |
| HSL | hsl(158, 16%, 29%) |
| OKLCH | oklch(43.4% 0.033 169.7) |
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 #3F574E | 7.82:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #3F574E | 2.68:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #3F574E text on white | 7.82:1 | AAA | Lc 87.1 | Fine for body text |
| #3F574E text on black | 2.68:1 | Fails | Lc -15.0 | Not readable |
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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E6EBE9
oklch(93.6% 0.006 170.4)
-
Step 200
200
#D3DBD8
oklch(88.4% 0.01 171.8)
-
Step 300
300
#B5C5BE
oklch(80.9% 0.02 167.8)
-
Step 400
400
#8FA79D
oklch(70.7% 0.03 168.4)
-
Step 500
500
#729186
oklch(63% 0.039 171.4)
-
Step 600
600
#5A7C6F
oklch(55.6% 0.044 169.1)
-
Step 700
700
#4A685D
oklch(49% 0.039 170)
-
Step 800
800 (this color)
#3F574E
oklch(43.4% 0.033 169.7)
-
Step 900
900
#34463F
oklch(37.6% 0.026 169.1)
-
Step 950
950
#1F2925
oklch(27% 0.016 168.8)
#3F574E 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) | #56544E | 0.034 |
| Deuteranopia (no green cones) | #51514F | 0.031 |
| Tritanopia (no blue cones) | #395754 | 0.012 |
| Achromatopsia (no color) | #525252 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F574E
#3F574E
oklch(43.4% 0.033 169.7)
- #5F4A54
#5F4A54
oklch(43.4% 0.032 348.3)
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 #3F574E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.035
- Dark Green Blue #1F6357 ΔE 0.043
- Deep Teal #00555A ΔE 0.052
- Petrol #005F6A ΔE 0.056
- Dark Blue Green #005249 ΔE 0.056
- Pine #2B5D34 ΔE 0.057
- Dark Aqua #05696B ΔE 0.065
- Dark Teal #014D4E ΔE 0.065
Use #3F574E 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.