#3F474E
Closest named color: Charcoal Grey (#3C4142). oklch(39.3% 0.016 244.6), rgb(63, 71, 78).
Aa
White text reads best on this color (9.44:1).
About this color
#3F474E is a dark close to neutral grey. In OKLCH its lightness is 39%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.025 away. White text reads best on it, at 9.44:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.22:1 |
| White text | 9.44:1 |
Values
| HEX | #3F474E |
| RGB | rgb(63, 71, 78) |
| HSL | hsl(208, 11%, 28%) |
| OKLCH | oklch(39.3% 0.016 244.6) |
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 #3F474E | 9.44:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #3F474E | 2.22:1 | Fails | Lc 12.1 | Not readable |
| #3F474E text on white | 9.44:1 | AAA | Lc 91.9 | Preferred for body text |
| #3F474E text on black | 2.22:1 | Fails | Lc -10.5 | 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 900.
-
Step 50
50
#F4F5F6
oklch(97% 0.002 247.8)
-
Step 100
100
#E8EAEC
oklch(93.6% 0.003 247.9)
-
Step 200
200
#D6DADD
oklch(88.6% 0.006 239.8)
-
Step 300
300
#BAC2C8
oklch(81% 0.012 239.9)
-
Step 400
400
#97A2AC
oklch(70.7% 0.019 245.5)
-
Step 500
500
#7E8B97
oklch(63% 0.024 246)
-
Step 600
600
#677582
oklch(55.5% 0.026 246.3)
-
Step 700
700
#55636E
oklch(49.2% 0.025 241.8)
-
Step 800
800
#46505A
oklch(42.6% 0.021 248.3)
-
Step 900
900 (this color)
#3F474E
oklch(39.3% 0.016 244.6)
-
Step 950
950
#22272B
oklch(26.9% 0.01 242.1)
#3F474E 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) | #44474E | 0.008 |
| Deuteranopia (no green cones) | #42454E | 0.008 |
| Tritanopia (no blue cones) | #3B4949 | 0.014 |
| Achromatopsia (no color) | #464646 | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F474E
#3F474E
oklch(39.3% 0.016 244.6)
- #4C443D
#4C443D
oklch(39.2% 0.016 63.5)
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 #3F474E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.025
- Dark Slate Gray #2F4F4F ΔE 0.031
- Charcoal #264653 ΔE 0.034
- Dark Grey Blue #29465B ΔE 0.037
- Onyx #343A40 ΔE 0.048
- Dark Teal #014D4E ΔE 0.057
- Deep Teal #00555A ΔE 0.061
- Dark Blue Grey #1F3B4D ΔE 0.063
Use #3F474E 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.