#3F4D47
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.6% 0.02 167.5), rgb(63, 77, 71).
Aa
White text reads best on this color (8.88:1).
About this color
#3F4D47 is a dark close to neutral grey. In OKLCH its lightness is 41%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.022 away. White text reads best on it, at 8.88:1.
| Hue family | Neutrals |
| Lightness | dark (41%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.36:1 |
| White text | 8.88:1 |
Values
| HEX | #3F4D47 |
| RGB | rgb(63, 77, 71) |
| HSL | hsl(154, 10%, 27%) |
| OKLCH | oklch(40.6% 0.02 167.5) |
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 #3F4D47 | 8.88:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #3F4D47 | 2.36:1 | Fails | Lc 13.6 | Not readable |
| #3F4D47 text on white | 8.88:1 | AAA | Lc 90.4 | Preferred for body text |
| #3F4D47 text on black | 2.36:1 | Fails | Lc -11.9 | 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
#E8EAE9
oklch(93.5% 0.003 165.1)
-
Step 200
200
#D5DAD8
oklch(88.4% 0.006 170.4)
-
Step 300
300
#BAC3BF
oklch(80.9% 0.011 167.7)
-
Step 400
400
#96A59E
oklch(70.8% 0.02 166.1)
-
Step 500
500
#7C8E86
oklch(63% 0.024 167)
-
Step 600
600
#657970
oklch(55.7% 0.027 166.4)
-
Step 700
700
#54655E
oklch(49% 0.023 168.5)
-
Step 800
800 (this color)
#3F4D47
oklch(40.6% 0.02 167.5)
-
Step 900
900
#3A4440
oklch(37.6% 0.015 169.5)
-
Step 950
950
#222825
oklch(27% 0.01 164.1)
#3F4D47 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) | #4C4B47 | 0.021 |
| Deuteranopia (no green cones) | #4A4947 | 0.020 |
| Tritanopia (no blue cones) | #3C4D4B | 0.007 |
| Achromatopsia (no color) | #4A4A4A | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4D47
#3F4D47
oklch(40.6% 0.02 167.5)
- #52454B
#52454B
oklch(40.6% 0.02 348.5)
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 #3F4D47, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.022
- Charcoal Grey #3C4142 ΔE 0.039
- Charcoal #264653 ΔE 0.048
- Dark Blue Green #005249 ΔE 0.052
- Dark Teal #014D4E ΔE 0.054
- Deep Teal #00555A ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.055
- Onyx #343A40 ΔE 0.065
Use #3F4D47 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.