#434A40
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.9% 0.019 136.2), rgb(67, 74, 64).
Aa
White text reads best on this color (9.16:1).
About this color
#434A40 is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.019. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.033 away. White text reads best on it, at 9.16:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.29:1 |
| White text | 9.16:1 |
Values
| HEX | #434A40 |
| RGB | rgb(67, 74, 64) |
| HSL | hsl(102, 7%, 27%) |
| OKLCH | oklch(39.9% 0.019 136.2) |
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 #434A40 | 9.16:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #434A40 | 2.29:1 | Fails | Lc 12.8 | Not readable |
| #434A40 text on white | 9.16:1 | AAA | Lc 91.1 | Preferred for body text |
| #434A40 text on black | 2.29:1 | Fails | Lc -11.2 | 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
#F5F6F4
oklch(97.2% 0.003 128.5)
-
Step 100
100
#E8EAE8
oklch(93.5% 0.003 145.5)
-
Step 200
200
#D7DAD5
oklch(88.5% 0.007 132.4)
-
Step 300
300
#BDC3BA
oklch(81% 0.014 134.9)
-
Step 400
400
#9AA496
oklch(70.7% 0.023 136.6)
-
Step 500
500
#828E7D
oklch(63.2% 0.029 136.4)
-
Step 600
600
#6B7866
oklch(55.6% 0.031 137)
-
Step 700
700
#596554
oklch(49.1% 0.03 136.5)
-
Step 800
800
#495245
oklch(42.6% 0.024 136)
-
Step 900
900 (this color)
#434A40
oklch(39.9% 0.019 136.2)
-
Step 950
950
#242822
oklch(27.1% 0.012 135.1)
#434A40 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) | #4B483F | 0.013 |
| Deuteranopia (no green cones) | #4A4840 | 0.012 |
| Tritanopia (no blue cones) | #434947 | 0.013 |
| Achromatopsia (no color) | #484848 | 0.019 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #434A40
#434A40
oklch(39.9% 0.019 136.2)
- #4C454E
#4C454E
oklch(40.1% 0.017 318.7)
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 #434A40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.033
- Charcoal Grey #3C4142 ΔE 0.034
- Charcoal #264653 ΔE 0.053
- Dark Blue Green #005249 ΔE 0.059
- Dark Teal #014D4E ΔE 0.060
- Onyx #343A40 ΔE 0.061
- Dark Grey Blue #29465B ΔE 0.061
- Deep Teal #00555A ΔE 0.065
Use #434A40 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.