#404A53
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.4% 0.02 245.5), rgb(64, 74, 83).
Aa
White text reads best on this color (9.04:1).
About this color
#404A53 is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.029 away. White text reads best on it, at 9.04:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.32:1 |
| White text | 9.04:1 |
Values
| HEX | #404A53 |
| RGB | rgb(64, 74, 83) |
| HSL | hsl(208, 13%, 29%) |
| OKLCH | oklch(40.4% 0.02 245.5) |
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 #404A53 | 9.04:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #404A53 | 2.32:1 | Fails | Lc 13.2 | Not readable |
| #404A53 text on white | 9.04:1 | AAA | Lc 90.8 | Preferred for body text |
| #404A53 text on black | 2.32:1 | Fails | Lc -11.5 | 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
#F4F5F6
oklch(97% 0.002 247.8)
-
Step 100
100
#E8EAEC
oklch(93.6% 0.003 247.9)
-
Step 200
200
#D6DADD
oklch(88.6% 0.006 239.8)
-
Step 300
300
#BBC1C8
oklch(80.8% 0.012 252.1)
-
Step 400
400
#97A2AC
oklch(70.7% 0.019 245.5)
-
Step 500
500
#7E8B97
oklch(63% 0.024 246)
-
Step 600
600
#677582
oklch(55.5% 0.026 246.3)
-
Step 700
700
#56626E
oklch(49% 0.024 248.3)
-
Step 800
800 (this color)
#404A53
oklch(40.4% 0.02 245.5)
-
Step 900
900
#3B4349
oklch(37.8% 0.015 240.3)
-
Step 950
950
#23272B
oklch(27% 0.009 248.2)
#404A53 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) | #474A53 | 0.011 |
| Deuteranopia (no green cones) | #444853 | 0.008 |
| Tritanopia (no blue cones) | #3B4C4D | 0.016 |
| Achromatopsia (no color) | #494949 | 0.020 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404A53
#404A53
oklch(40.4% 0.02 245.5)
- #50473E
#50473E
oklch(40.4% 0.019 67.2)
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 #404A53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.029
- Charcoal Grey #3C4142 ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.038
- Charcoal #264653 ΔE 0.038
- Deep Teal #00555A ΔE 0.057
- Dark Teal #014D4E ΔE 0.058
- Onyx #343A40 ΔE 0.059
- Dark Blue Green #005249 ΔE 0.065
Use #404A53 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.