#404A3A
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.5% 0.029 133.8), rgb(64, 74, 58).
Aa
White text reads best on this color (9.29:1).
About this color
#404A3A is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.036 away. White text reads best on it, at 9.29:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.25:1 |
| White text | 9.29:1 |
Values
| HEX | #404A3A |
| RGB | rgb(64, 74, 58) |
| HSL | hsl(98, 12%, 26%) |
| OKLCH | oklch(39.5% 0.029 133.8) |
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 #404A3A | 9.29:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #404A3A | 2.25:1 | Fails | Lc 12.5 | Not readable |
| #404A3A text on white | 9.29:1 | AAA | Lc 91.5 | Preferred for body text |
| #404A3A text on black | 2.25:1 | 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
#E8EBE6
oklch(93.6% 0.007 132.4)
-
Step 200
200
#D6DBD3
oklch(88.5% 0.012 133.4)
-
Step 300
300
#BBC4B6
oklch(80.9% 0.022 134.1)
-
Step 400
400
#98A690
oklch(70.8% 0.035 134)
-
Step 500
500
#7F9074
oklch(63.2% 0.045 133.2)
-
Step 600
600
#687A5D
oklch(55.7% 0.049 133.8)
-
Step 700
700
#56674C
oklch(49.2% 0.047 134.1)
-
Step 800
800
#47543F
oklch(42.8% 0.037 133.7)
-
Step 900
900 (this color)
#404A3A
oklch(39.5% 0.029 133.8)
-
Step 950
950
#23291F
oklch(27.2% 0.02 132.9)
#404A3A 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) | #4B4839 | 0.018 |
| Deuteranopia (no green cones) | #4A473B | 0.019 |
| Tritanopia (no blue cones) | #404946 | 0.021 |
| Achromatopsia (no color) | #474747 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404A3A
#404A3A
oklch(39.5% 0.029 133.8)
- #4C4252
#4C4252
oklch(39.5% 0.029 312.8)
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 #404A3A, 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
- Charcoal Grey #3C4142 ΔE 0.037
- Dark Blue Green #005249 ΔE 0.056
- Charcoal #264653 ΔE 0.057
- Dark Teal #014D4E ΔE 0.059
- Onyx #343A40 ΔE 0.062
- Mud Brown #60460F ΔE 0.066
- Deep Teal #00555A ΔE 0.066
Use #404A3A 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.