#2F3F33
Closest named color: Onyx (#343A40). oklch(35% 0.029 152.3), rgb(47, 63, 51).
Aa
White text reads best on this color (11.17:1).
About this color
#2F3F33 is a dark close to neutral grey. In OKLCH its lightness is 35%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.034 away. White text reads best on it, at 11.17:1.
| Hue family | Neutrals |
| Lightness | dark (35%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.87:1 |
| White text | 11.17:1 |
Values
| HEX | #2F3F33 |
| RGB | rgb(47, 63, 51) |
| HSL | hsl(135, 15%, 22%) |
| OKLCH | oklch(35% 0.029 152.3) |
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 #2F3F33 | 11.17:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #2F3F33 | 1.87:1 | Fails | Lc 8.1 | Not readable |
| #2F3F33 text on white | 11.17:1 | AAA | Lc 95.8 | Preferred for body text |
| #2F3F33 text on black | 1.87:1 | Fails | Lc 0.0 | 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 900.
-
Step 50
50
#F4F6F4
oklch(97.1% 0.003 145.5)
-
Step 100
100
#E7EBE8
oklch(93.6% 0.006 153.8)
-
Step 200
200
#D3DCD5
oklch(88.6% 0.014 152.6)
-
Step 300
300
#B7C5BA
oklch(80.9% 0.022 152.1)
-
Step 400
400
#91A796
oklch(70.6% 0.035 152.2)
-
Step 500
500
#76927C
oklch(63.2% 0.046 151.3)
-
Step 600
600
#5E7C65
oklch(55.6% 0.049 151.7)
-
Step 700
700
#4D6854
oklch(49% 0.045 152.5)
-
Step 800
800
#405545
oklch(42.7% 0.037 151.9)
-
Step 900
900 (this color)
#2F3F33
oklch(35% 0.029 152.3)
-
Step 950
950
#202922
oklch(27% 0.018 151.7)
#2F3F33 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) | #3F3C32 | 0.026 |
| Deuteranopia (no green cones) | #3C3A34 | 0.026 |
| Tritanopia (no blue cones) | #2D3E3C | 0.017 |
| Achromatopsia (no color) | #3B3B3B | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F3F33
#2F3F33
oklch(35% 0.029 152.3)
- #443541
#443541
oklch(35% 0.029 333.2)
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 #2F3F33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.034
- Charcoal Grey #3C4142 ΔE 0.034
- Pakistan Green #283618 ΔE 0.047
- Evergreen #05472A ΔE 0.051
- Charcoal #264653 ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.054
- Dark Olive #373E02 ΔE 0.057
- Dark Teal #014D4E ΔE 0.057
Use #2F3F33 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.