#404F3F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.9% 0.032 143.3), rgb(64, 79, 63).
Aa
White text reads best on this color (8.72:1).
About this color
#404F3F is a dark, muted green. In OKLCH its lightness is 41%, its chroma 0.032 and its hue 143°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.032 away. White text reads best on it, at 8.72:1.
| Hue family | Greens |
| Lightness | dark (41%) |
| Chroma | muted (0.032) |
| Temperature | in between |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.40:1 |
| White text | 8.72:1 |
Values
| HEX | #404F3F |
| RGB | rgb(64, 79, 63) |
| HSL | hsl(116, 11%, 28%) |
| OKLCH | oklch(40.9% 0.032 143.3) |
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 #404F3F | 8.72:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #404F3F | 2.40:1 | Fails | Lc 14.1 | Not readable |
| #404F3F text on white | 8.72:1 | AAA | Lc 89.9 | Fine for body text |
| #404F3F text on black | 2.40:1 | Fails | Lc -12.4 | 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 800.
-
Step 50
50
#F4F6F4
oklch(97.1% 0.003 145.5)
-
Step 100
100
#E8EBE7
oklch(93.7% 0.006 137.8)
-
Step 200
200
#D5DBD5
oklch(88.5% 0.01 145.5)
-
Step 300
300
#BAC4B9
oklch(80.9% 0.019 142.8)
-
Step 400
400
#96A695
oklch(70.8% 0.03 143.6)
-
Step 500
500
#7C907B
oklch(63.1% 0.039 143.8)
-
Step 600
600
#657A64
oklch(55.6% 0.042 143.8)
-
Step 700
700
#546753
oklch(49.2% 0.039 143.7)
-
Step 800
800 (this color)
#404F3F
oklch(40.9% 0.032 143.3)
-
Step 900
900
#3A4539
oklch(37.7% 0.025 142.8)
-
Step 950
950
#222921
oklch(27.1% 0.018 141.6)
#404F3F 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) | #504C3E | 0.026 |
| Deuteranopia (no green cones) | #4D4A40 | 0.025 |
| Tritanopia (no blue cones) | #3F4E4A | 0.019 |
| Achromatopsia (no color) | #4B4B4B | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404F3F
#404F3F
oklch(40.9% 0.032 143.3)
- #534455
#534455
oklch(40.9% 0.034 322.4)
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 #404F3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.032
- Charcoal Grey #3C4142 ΔE 0.049
- Dark Blue Green #005249 ΔE 0.052
- Pine #2B5D34 ΔE 0.058
- Dark Teal #014D4E ΔE 0.059
- Deep Teal #00555A ΔE 0.059
- Charcoal #264653 ΔE 0.062
- Green Brown #544E03 ΔE 0.065
Use #404F3F 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.