#40523F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.7% 0.038 143.5), rgb(64, 82, 63).
Aa
White text reads best on this color (8.41:1).
About this color
#40523F is a dark, muted green. In OKLCH its lightness is 42%, its chroma 0.038 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.036 away. White text reads best on it, at 8.41:1.
| Hue family | Greens |
| Lightness | dark (42%) |
| Chroma | muted (0.038) |
| Temperature | in between |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.49:1 |
| White text | 8.41:1 |
Values
| HEX | #40523F |
| RGB | rgb(64, 82, 63) |
| HSL | hsl(117, 13%, 28%) |
| OKLCH | oklch(41.7% 0.038 143.5) |
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 #40523F | 8.41:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #40523F | 2.49:1 | Fails | Lc 15.0 | Dividers and decoration only |
| #40523F text on white | 8.41:1 | AAA | Lc 89.0 | Fine for body text |
| #40523F text on black | 2.49:1 | Fails | Lc -13.2 | 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 800.
-
Step 50
50
#F4F6F4
oklch(97.1% 0.003 145.5)
-
Step 100
100
#E7EBE7
oklch(93.6% 0.007 145.5)
-
Step 200
200
#D4DBD4
oklch(88.4% 0.012 145.5)
-
Step 300
300
#B8C5B8
oklch(81% 0.023 145.4)
-
Step 400
400
#94A793
oklch(70.8% 0.036 143.8)
-
Step 500
500
#799178
oklch(63.1% 0.046 144)
-
Step 600
600
#627B61
oklch(55.5% 0.049 143.9)
-
Step 700
700
#516850
oklch(49.1% 0.047 143.8)
-
Step 800
800 (this color)
#40523F
oklch(41.7% 0.038 143.5)
-
Step 900
900
#384637
oklch(37.7% 0.031 143.2)
-
Step 950
950
#212921
oklch(27% 0.018 145)
#40523F 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) | #534E3E | 0.030 |
| Deuteranopia (no green cones) | #504D40 | 0.029 |
| Tritanopia (no blue cones) | #3F514D | 0.024 |
| Achromatopsia (no color) | #4D4D4D | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40523F
#40523F
oklch(41.7% 0.038 143.5)
- #574558
#574558
oklch(41.6% 0.039 324.6)
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 #40523F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.036
- Pine #2B5D34 ΔE 0.050
- Dark Blue Green #005249 ΔE 0.053
- Dark Green Blue #1F6357 ΔE 0.058
- Charcoal Grey #3C4142 ΔE 0.059
- Deep Teal #00555A ΔE 0.060
- Green Brown #544E03 ΔE 0.062
- Dark Teal #014D4E ΔE 0.063
Use #40523F 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.