#40554A
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.8% 0.032 161.9), rgb(64, 85, 74).
Aa
White text reads best on this color (8.02:1).
About this color
#40554A is a dark, muted green. In OKLCH its lightness is 43%, its chroma 0.032 and its hue 162°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.033 away. White text reads best on it, at 8.02:1.
| Hue family | Greens |
| Lightness | dark (43%) |
| Chroma | muted (0.032) |
| Temperature | in between |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.61:1 |
| White text | 8.02:1 |
Values
| HEX | #40554A |
| RGB | rgb(64, 85, 74) |
| HSL | hsl(149, 14%, 29%) |
| OKLCH | oklch(42.8% 0.032 161.9) |
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 #40554A | 8.02:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #40554A | 2.61:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #40554A text on white | 8.02:1 | AAA | Lc 87.8 | Fine for body text |
| #40554A text on black | 2.61:1 | Fails | Lc -14.3 | 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
#D3DBD7
oklch(88.4% 0.01 164.8)
-
Step 300
300
#B7C4BD
oklch(80.8% 0.017 162.6)
-
Step 400
400
#91A79B
oklch(70.8% 0.03 161.7)
-
Step 500
500
#769182
oklch(63.1% 0.038 160.8)
-
Step 600
600
#5E7B6C
oklch(55.6% 0.041 162.2)
-
Step 700
700
#4D685A
oklch(49.1% 0.039 162)
-
Step 800
800 (this color)
#40554A
oklch(42.8% 0.032 161.9)
-
Step 900
900
#36463E
oklch(37.8% 0.025 163.3)
-
Step 950
950
#202924
oklch(27% 0.016 160.8)
#40554A 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) | #545249 | 0.030 |
| Deuteranopia (no green cones) | #514F4B | 0.031 |
| Tritanopia (no blue cones) | #3C5552 | 0.014 |
| Achromatopsia (no color) | #505050 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40554A
#40554A
oklch(42.8% 0.032 161.9)
- #5C4954
#5C4954
oklch(42.9% 0.031 342.8)
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 #40554A, 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
- Dark Green Blue #1F6357 ΔE 0.048
- Deep Teal #00555A ΔE 0.053
- Dark Blue Green #005249 ΔE 0.055
- Pine #2B5D34 ΔE 0.056
- Petrol #005F6A ΔE 0.061
- Dark Teal #014D4E ΔE 0.064
- Charcoal Grey #3C4142 ΔE 0.064
Use #40554A 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.