#404E39
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.5% 0.039 135.3), rgb(64, 78, 57).
Aa
White text reads best on this color (8.87:1).
About this color
#404E39 is a dark, muted green. In OKLCH its lightness is 41%, its chroma 0.039 and its hue 135°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.038 away. White text reads best on it, at 8.87:1.
| Hue family | Greens |
| Lightness | dark (41%) |
| Chroma | muted (0.039) |
| Temperature | in between |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.36:1 |
| White text | 8.87:1 |
Values
| HEX | #404E39 |
| RGB | rgb(64, 78, 57) |
| HSL | hsl(100, 16%, 26%) |
| OKLCH | oklch(40.5% 0.039 135.3) |
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 #404E39 | 8.87:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #404E39 | 2.36:1 | Fails | Lc 13.7 | Not readable |
| #404E39 text on white | 8.87:1 | AAA | Lc 90.3 | Preferred for body text |
| #404E39 text on black | 2.36:1 | Fails | Lc -12.0 | 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
#E8EBE6
oklch(93.6% 0.007 132.4)
-
Step 200
200
#D6DBD3
oklch(88.5% 0.012 133.4)
-
Step 300
300
#BAC4B6
oklch(80.9% 0.022 136.6)
-
Step 400
400
#97A690
oklch(70.7% 0.036 135.6)
-
Step 500
500
#7D9074
oklch(63% 0.046 135.6)
-
Step 600
600
#677A5D
oklch(55.6% 0.049 134.9)
-
Step 700
700
#55674C
oklch(49.1% 0.047 135.3)
-
Step 800
800 (this color)
#404E39
oklch(40.5% 0.039 135.3)
-
Step 900
900
#3B4535
oklch(37.6% 0.03 133.8)
-
Step 950
950
#22291F
oklch(27.1% 0.021 136.3)
#404E39 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) | #504B38 | 0.026 |
| Deuteranopia (no green cones) | #4D493A | 0.025 |
| Tritanopia (no blue cones) | #404C48 | 0.027 |
| Achromatopsia (no color) | #4A4A4A | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404E39
#404E39
oklch(40.5% 0.039 135.3)
- #514358
#514358
oklch(40.5% 0.039 314.4)
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 #404E39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.038
- Charcoal Grey #3C4142 ΔE 0.051
- Dark Blue Green #005249 ΔE 0.054
- Pine #2B5D34 ΔE 0.056
- Green Brown #544E03 ΔE 0.058
- Dark Teal #014D4E ΔE 0.062
- Mud Brown #60460F ΔE 0.063
- Navy Green #35530A ΔE 0.064
Use #404E39 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.