#404A3C
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.6% 0.026 136.7), rgb(64, 74, 60).
Aa
White text reads best on this color (9.28:1).
About this color
#404A3C is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.034 away. White text reads best on it, at 9.28:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.26:1 |
| White text | 9.28:1 |
Values
| HEX | #404A3C |
| RGB | rgb(64, 74, 60) |
| HSL | hsl(103, 10%, 26%) |
| OKLCH | oklch(39.6% 0.026 136.7) |
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 #404A3C | 9.28:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #404A3C | 2.26:1 | Fails | Lc 12.5 | Not readable |
| #404A3C text on white | 9.28:1 | AAA | Lc 91.4 | Preferred for body text |
| #404A3C text on black | 2.26:1 | Fails | Lc -10.9 | 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
#F5F6F4
oklch(97.2% 0.003 128.5)
-
Step 100
100
#E8EBE7
oklch(93.7% 0.006 137.8)
-
Step 200
200
#D6DBD4
oklch(88.6% 0.011 136.6)
-
Step 300
300
#BBC4B7
oklch(81% 0.02 135.8)
-
Step 400
400
#98A692
oklch(70.8% 0.033 136.2)
-
Step 500
500
#7E9077
oklch(63.2% 0.042 136.9)
-
Step 600
600
#677A60
oklch(55.6% 0.045 137.3)
-
Step 700
700
#56664F
oklch(49% 0.041 136.2)
-
Step 800
800
#465441
oklch(42.8% 0.035 137.5)
-
Step 900
900 (this color)
#404A3C
oklch(39.6% 0.026 136.7)
-
Step 950
950
#232820
oklch(26.9% 0.016 133.7)
#404A3C 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) | #4B483B | 0.018 |
| Deuteranopia (no green cones) | #49473D | 0.017 |
| Tritanopia (no blue cones) | #404946 | 0.018 |
| Achromatopsia (no color) | #474747 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404A3C
#404A3C
oklch(39.6% 0.026 136.7)
- #4C4250
#4C4250
oklch(39.5% 0.027 316.3)
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 #404A3C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.034
- Charcoal Grey #3C4142 ΔE 0.035
- Charcoal #264653 ΔE 0.055
- Dark Blue Green #005249 ΔE 0.055
- Dark Teal #014D4E ΔE 0.058
- Onyx #343A40 ΔE 0.061
- Dark Grey Blue #29465B ΔE 0.064
- Deep Teal #00555A ΔE 0.065
Use #404A3C 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.