#3F4033
Closest named color: Charcoal Grey (#3C4142). oklch(36.6% 0.022 111), rgb(63, 64, 51).
Aa
White text reads best on this color (10.53:1).
About this color
#3F4033 is a dark close to neutral grey. In OKLCH its lightness is 37%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.024 away. White text reads best on it, at 10.53:1.
| Hue family | Neutrals |
| Lightness | dark (37%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.99:1 |
| White text | 10.53:1 |
Values
| HEX | #3F4033 |
| RGB | rgb(63, 64, 51) |
| HSL | hsl(65, 11%, 23%) |
| OKLCH | oklch(36.6% 0.022 111) |
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 #3F4033 | 10.53:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #3F4033 | 1.99:1 | Fails | Lc 9.4 | Not readable |
| #3F4033 text on white | 10.53:1 | AAA | Lc 94.5 | Preferred for body text |
| #3F4033 text on black | 1.99:1 | Fails | Lc -8.1 | 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
#F5F5F4
oklch(97% 0.001 106.4)
-
Step 100
100
#EAEAE7
oklch(93.6% 0.004 106.5)
-
Step 200
200
#D9DAD3
oklch(88.6% 0.01 113.2)
-
Step 300
300
#C1C2B6
oklch(81% 0.017 110.6)
-
Step 400
400
#A1A290
oklch(70.6% 0.026 109.6)
-
Step 500
500
#8A8C75
oklch(63.2% 0.033 111.4)
-
Step 600
600
#74765D
oklch(55.7% 0.037 111.3)
-
Step 700
700
#61634D
oklch(49.1% 0.034 111.9)
-
Step 800
800
#4F513F
oklch(42.8% 0.029 112.8)
-
Step 900
900 (this color)
#3F4033
oklch(36.6% 0.022 111)
-
Step 950
950
#272720
oklch(27% 0.013 107.2)
#3F4033 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) | #423F32 | 0.005 |
| Deuteranopia (no green cones) | #423F33 | 0.006 |
| Tritanopia (no blue cones) | #413E3C | 0.019 |
| Achromatopsia (no color) | #3F3F3F | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4033
#3F4033
oklch(36.6% 0.022 111)
- #3F3D4A
#3F3D4A
oklch(36.7% 0.022 292.3)
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 #3F4033, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.024
- Onyx #343A40 ΔE 0.039
- Dark Slate Gray #2F4F4F ΔE 0.055
- Charcoal #264653 ΔE 0.057
- Dark Olive #373E02 ΔE 0.060
- Pakistan Green #283618 ΔE 0.064
- Dark Grey Blue #29465B ΔE 0.068
- Dark Blue Grey #1F3B4D ΔE 0.068
Use #3F4033 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.