#40544B
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.6% 0.029 165.8), rgb(64, 84, 75).
Aa
White text reads best on this color (8.11:1).
About this color
#40544B is a dark close to neutral grey. In OKLCH its lightness is 43%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.030 away. White text reads best on it, at 8.11:1.
| Hue family | Neutrals |
| Lightness | dark (43%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.58:1 |
| White text | 8.11:1 |
Values
| HEX | #40544B |
| RGB | rgb(64, 84, 75) |
| HSL | hsl(153, 14%, 29%) |
| OKLCH | oklch(42.6% 0.029 165.8) |
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 #40544B | 8.11:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #40544B | 2.58:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #40544B text on white | 8.11:1 | AAA | Lc 88.1 | Fine for body text |
| #40544B text on black | 2.58:1 | Fails | Lc -14.1 | 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 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
#B7C4BE
oklch(80.9% 0.017 166.6)
-
Step 400
400
#92A69D
oklch(70.7% 0.026 166.8)
-
Step 500
500
#769085
oklch(63% 0.034 167.7)
-
Step 600
600
#5F7B6E
oklch(55.7% 0.038 165)
-
Step 700
700
#4E675C
oklch(49% 0.035 166.2)
-
Step 800
800 (this color)
#40544B
oklch(42.6% 0.029 165.8)
-
Step 900
900
#37463F
oklch(37.9% 0.023 165.2)
-
Step 950
950
#202925
oklch(27.1% 0.015 166.5)
#40544B 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) | #53514B | 0.029 |
| Deuteranopia (no green cones) | #4F4F4C | 0.027 |
| Tritanopia (no blue cones) | #3C5451 | 0.011 |
| Achromatopsia (no color) | #505050 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40544B
#40544B
oklch(42.6% 0.029 165.8)
- #5B4952
#5B4952
oklch(42.7% 0.028 346.8)
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 #40544B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.030
- Dark Green Blue #1F6357 ΔE 0.051
- Deep Teal #00555A ΔE 0.052
- Dark Blue Green #005249 ΔE 0.054
- Pine #2B5D34 ΔE 0.060
- Charcoal Grey #3C4142 ΔE 0.060
- Petrol #005F6A ΔE 0.061
- Dark Teal #014D4E ΔE 0.062
Use #40544B 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.