#40534D
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.4% 0.026 173.8), rgb(64, 83, 77).
Aa
White text reads best on this color (8.19:1).
About this color
#40534D is a dark close to neutral grey. In OKLCH its lightness is 42%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.027 away. White text reads best on it, at 8.19:1.
| Hue family | Neutrals |
| Lightness | dark (42%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.56:1 |
| White text | 8.19:1 |
Values
| HEX | #40534D |
| RGB | rgb(64, 83, 77) |
| HSL | hsl(161, 13%, 29%) |
| OKLCH | oklch(42.4% 0.026 173.8) |
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 #40534D | 8.19:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #40534D | 2.56:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #40534D text on white | 8.19:1 | AAA | Lc 88.3 | Fine for body text |
| #40534D text on black | 2.56:1 | Fails | Lc -13.8 | 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 800.
-
Step 50
50
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E7EBE9
oklch(93.6% 0.005 165)
-
Step 200
200
#D4DBD8
oklch(88.5% 0.009 168.7)
-
Step 300
300
#B7C4C0
oklch(80.9% 0.015 175.6)
-
Step 400
400
#92A69F
oklch(70.8% 0.025 172.5)
-
Step 500
500
#779088
oklch(63.1% 0.031 173.9)
-
Step 600
600
#607A72
oklch(55.6% 0.033 174.3)
-
Step 700
700
#4F675F
oklch(49.2% 0.031 172.6)
-
Step 800
800 (this color)
#40534D
oklch(42.4% 0.026 173.8)
-
Step 900
900
#374541
oklch(37.7% 0.019 176)
-
Step 950
950
#202926
oklch(27.1% 0.014 173)
#40534D 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) | #52504D | 0.028 |
| Deuteranopia (no green cones) | #4E4E4D | 0.025 |
| Tritanopia (no blue cones) | #3C5351 | 0.008 |
| Achromatopsia (no color) | #4F4F4F | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40534D
#40534D
oklch(42.4% 0.026 173.8)
- #5A494F
#5A494F
oklch(42.5% 0.025 355)
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 #40534D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.027
- Deep Teal #00555A ΔE 0.051
- Dark Green Blue #1F6357 ΔE 0.054
- Dark Blue Green #005249 ΔE 0.055
- Charcoal Grey #3C4142 ΔE 0.057
- Charcoal #264653 ΔE 0.060
- Dark Teal #014D4E ΔE 0.060
- Petrol #005F6A ΔE 0.061
Use #40534D 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.