#404C39
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40% 0.035 134.1), rgb(64, 76, 57).
Aa
White text reads best on this color (9.08:1).
About this color
#404C39 is a dark, muted green. In OKLCH its lightness is 40%, its chroma 0.035 and its hue 134°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.037 away. White text reads best on it, at 9.08:1.
| Hue family | Greens |
| Lightness | dark (40%) |
| Chroma | muted (0.035) |
| Temperature | in between |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.31:1 |
| White text | 9.08:1 |
Values
| HEX | #404C39 |
| RGB | rgb(64, 76, 57) |
| HSL | hsl(98, 14%, 26%) |
| OKLCH | oklch(40% 0.035 134.1) |
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 #404C39 | 9.08:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #404C39 | 2.31:1 | Fails | Lc 13.1 | Not readable |
| #404C39 text on white | 9.08:1 | AAA | Lc 90.9 | Preferred for body text |
| #404C39 text on black | 2.31:1 | Fails | Lc -11.4 | 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 900.
-
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
#D5DBD2
oklch(88.4% 0.014 134.9)
-
Step 300
300
#BAC5B4
oklch(81% 0.026 134.3)
-
Step 400
400
#96A78D
oklch(70.8% 0.042 134.7)
-
Step 500
500
#7C9170
oklch(63.1% 0.054 134.3)
-
Step 600
600
#657B58
oklch(55.5% 0.058 134.2)
-
Step 700
700
#546848
oklch(49.2% 0.055 134.1)
-
Step 800
800
#45553C
oklch(42.8% 0.045 134.5)
-
Step 900
900 (this color)
#404C39
oklch(40% 0.035 134.1)
-
Step 950
950
#22291E
oklch(27% 0.022 134.3)
#404C39 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) | #4E4938 | 0.023 |
| Deuteranopia (no green cones) | #4C483A | 0.023 |
| Tritanopia (no blue cones) | #404A47 | 0.026 |
| Achromatopsia (no color) | #484848 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404C39
#404C39
oklch(40% 0.035 134.1)
- #4F4255
#4F4255
oklch(40% 0.036 315.1)
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 #404C39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.037
- Charcoal Grey #3C4142 ΔE 0.045
- Dark Blue Green #005249 ΔE 0.054
- Dark Teal #014D4E ΔE 0.060
- Green Brown #544E03 ΔE 0.061
- Charcoal #264653 ΔE 0.062
- Pine #2B5D34 ΔE 0.062
- Mud Brown #60460F ΔE 0.064
Use #404C39 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.