#343F31
Closest named color: Charcoal Grey (#3C4142). oklch(35.3% 0.028 139), rgb(52, 63, 49).
Aa
White text reads best on this color (11.04:1).
About this color
#343F31 is a dark close to neutral grey. In OKLCH its lightness is 35%, its chroma 0.028. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.032 away. White text reads best on it, at 11.04:1.
| Hue family | Neutrals |
| Lightness | dark (35%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.90:1 |
| White text | 11.04:1 |
Values
| HEX | #343F31 |
| RGB | rgb(52, 63, 49) |
| HSL | hsl(107, 13%, 22%) |
| OKLCH | oklch(35.3% 0.028 139) |
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 #343F31 | 11.04:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #343F31 | 1.90:1 | Fails | Lc 8.3 | Not readable |
| #343F31 text on white | 11.04:1 | AAA | Lc 95.6 | Preferred for body text |
| #343F31 text on black | 1.90:1 | 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
#E8EBE7
oklch(93.7% 0.006 137.8)
-
Step 200
200
#D5DBD4
oklch(88.5% 0.011 141.3)
-
Step 300
300
#BAC4B7
oklch(80.9% 0.021 138.4)
-
Step 400
400
#96A692
oklch(70.7% 0.034 139.4)
-
Step 500
500
#7D9077
oklch(63.1% 0.043 138.2)
-
Step 600
600
#667A60
oklch(55.6% 0.046 138.5)
-
Step 700
700
#54674F
oklch(49.1% 0.044 139.2)
-
Step 800
800
#455441
oklch(42.7% 0.036 139.1)
-
Step 900
900 (this color)
#343F31
oklch(35.3% 0.028 139)
-
Step 950
950
#222920
oklch(27.1% 0.019 138.8)
#343F31 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) | #403D30 | 0.020 |
| Deuteranopia (no green cones) | #3E3C32 | 0.019 |
| Tritanopia (no blue cones) | #343E3B | 0.018 |
| Achromatopsia (no color) | #3C3C3C | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #343F31
#343F31
oklch(35.3% 0.028 139)
- #423745
#423745
oklch(35.4% 0.028 318.9)
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 #343F31, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.032
- Onyx #343A40 ΔE 0.035
- Pakistan Green #283618 ΔE 0.049
- Dark Olive #373E02 ΔE 0.054
- Evergreen #05472A ΔE 0.054
- Charcoal #264653 ΔE 0.055
- Dark Slate Gray #2F4F4F ΔE 0.059
- Dark Blue Grey #1F3B4D ΔE 0.060
Use #343F31 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.