#404C47
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.4% 0.017 168.4), rgb(64, 76, 71).
Aa
White text reads best on this color (8.96:1).
About this color
#404C47 is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.024 away. White text reads best on it, at 8.96:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.34:1 |
| White text | 8.96:1 |
Values
| HEX | #404C47 |
| RGB | rgb(64, 76, 71) |
| HSL | hsl(155, 9%, 27%) |
| OKLCH | oklch(40.4% 0.017 168.4) |
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 #404C47 | 8.96:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #404C47 | 2.34:1 | Fails | Lc 13.4 | Not readable |
| #404C47 text on white | 8.96:1 | AAA | Lc 90.6 | Preferred for body text |
| #404C47 text on black | 2.34:1 | Fails | Lc -11.7 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E8EAE9
oklch(93.5% 0.003 165.1)
-
Step 200
200
#D6DAD8
oklch(88.5% 0.005 165)
-
Step 300
300
#BBC3BF
oklch(81% 0.01 164.8)
-
Step 400
400
#97A49F
oklch(70.7% 0.016 170.8)
-
Step 500
500
#7E8E87
oklch(63.2% 0.021 167.5)
-
Step 600
600
#677871
oklch(55.7% 0.023 168.7)
-
Step 700
700
#56655E
oklch(49.2% 0.021 165.7)
-
Step 800
800 (this color)
#404C47
oklch(40.4% 0.017 168.4)
-
Step 900
900
#3B4440
oklch(37.7% 0.014 167.1)
-
Step 950
950
#232826
oklch(27.1% 0.008 169.8)
#404C47 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) | #4B4A47 | 0.018 |
| Deuteranopia (no green cones) | #494947 | 0.016 |
| Tritanopia (no blue cones) | #3E4C4A | 0.005 |
| Achromatopsia (no color) | #494949 | 0.018 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404C47
#404C47
oklch(40.4% 0.017 168.4)
- #50454A
#50454A
oklch(40.3% 0.017 348.7)
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 #404C47, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.024
- Charcoal Grey #3C4142 ΔE 0.036
- Charcoal #264653 ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.053
- Dark Blue Green #005249 ΔE 0.055
- Dark Teal #014D4E ΔE 0.055
- Deep Teal #00555A ΔE 0.056
- Onyx #343A40 ΔE 0.062
Use #404C47 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.