#40342B
Closest named color: Onyx (#343A40). oklch(33.5% 0.023 58.7), rgb(64, 52, 43).
Aa
White text reads best on this color (12.04:1).
About this color
#40342B is a dark close to neutral grey. In OKLCH its lightness is 34%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.038 away. White text reads best on it, at 12.04:1.
| Hue family | Neutrals |
| Lightness | dark (34%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.74:1 |
| White text | 12.04:1 |
Values
| HEX | #40342B |
| RGB | rgb(64, 52, 43) |
| HSL | hsl(26, 20%, 21%) |
| OKLCH | oklch(33.5% 0.023 58.7) |
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 #40342B | 12.04:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #40342B | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #40342B text on white | 12.04:1 | AAA | Lc 97.6 | Preferred for body text |
| #40342B text on black | 1.74:1 | 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
#F7F5F4
oklch(97.1% 0.003 48.7)
-
Step 100
100
#ECE9E7
oklch(93.6% 0.004 56.4)
-
Step 200
200
#DED8D3
oklch(88.6% 0.009 62.6)
-
Step 300
300
#CABEB6
oklch(80.9% 0.018 56.1)
-
Step 400
400
#AE9D90
oklch(70.7% 0.027 59.7)
-
Step 500
500
#9A8575
oklch(63.1% 0.035 59.4)
-
Step 600
600
#856E5D
oklch(55.6% 0.039 58.3)
-
Step 700
700
#715C4D
oklch(49.1% 0.036 57.3)
-
Step 800
800
#5C4B3F
oklch(42.7% 0.03 57)
-
Step 900
900 (this color)
#40342B
oklch(33.5% 0.023 58.7)
-
Step 950
950
#2C251F
oklch(27% 0.015 62.7)
#40342B 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) | #38352A | 0.015 |
| Deuteranopia (no green cones) | #3A372B | 0.014 |
| Tritanopia (no blue cones) | #443232 | 0.017 |
| Achromatopsia (no color) | #363636 | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40342B
#40342B
oklch(33.5% 0.023 58.7)
- #2C3941
#2C3941
oklch(33.6% 0.022 235.3)
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 #40342B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.038
- Charcoal Grey #3C4142 ΔE 0.046
- Pakistan Green #283618 ΔE 0.055
- Gunmetal #293241 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.065
- Dark Olive #373E02 ΔE 0.069
- Dark Blue Grey #1F3B4D ΔE 0.070
- Charcoal #264653 ΔE 0.078
Use #40342B 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.