#404D43
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.5% 0.023 152.2), rgb(64, 77, 67).
Aa
White text reads best on this color (8.89:1).
About this color
#404D43 is a dark close to neutral grey. In OKLCH its lightness is 41%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.026 away. White text reads best on it, at 8.89:1.
| Hue family | Neutrals |
| Lightness | dark (41%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.36:1 |
| White text | 8.89:1 |
Values
| HEX | #404D43 |
| RGB | rgb(64, 77, 67) |
| HSL | hsl(134, 9%, 28%) |
| OKLCH | oklch(40.5% 0.023 152.2) |
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 #404D43 | 8.89:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #404D43 | 2.36:1 | Fails | Lc 13.6 | Not readable |
| #404D43 text on white | 8.89:1 | AAA | Lc 90.4 | Preferred for body text |
| #404D43 text on black | 2.36:1 | Fails | Lc -11.9 | 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 800.
-
Step 50
50
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E8EBE8
oklch(93.7% 0.005 145.5)
-
Step 200
200
#D6DBD7
oklch(88.6% 0.008 151.9)
-
Step 300
300
#BAC3BC
oklch(80.8% 0.014 152.5)
-
Step 400
400
#97A59A
oklch(70.8% 0.022 152)
-
Step 500
500
#7D8F81
oklch(63.1% 0.029 152.1)
-
Step 600
600
#66796B
oklch(55.6% 0.031 153.4)
-
Step 700
700
#556659
oklch(49.2% 0.029 152.3)
-
Step 800
800 (this color)
#404D43
oklch(40.5% 0.023 152.2)
-
Step 900
900
#3B453D
oklch(37.9% 0.019 151.2)
-
Step 950
950
#222824
oklch(26.9% 0.011 156.4)
#404D43 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) | #4D4B42 | 0.020 |
| Deuteranopia (no green cones) | #4B4943 | 0.020 |
| Tritanopia (no blue cones) | #3E4D4A | 0.012 |
| Achromatopsia (no color) | #4A4A4A | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404D43
#404D43
oklch(40.5% 0.023 152.2)
- #51454F
#51454F
oklch(40.6% 0.023 331.6)
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 #404D43, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.026
- Charcoal Grey #3C4142 ΔE 0.040
- Dark Blue Green #005249 ΔE 0.053
- Charcoal #264653 ΔE 0.053
- Dark Teal #014D4E ΔE 0.056
- Deep Teal #00555A ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.060
- Onyx #343A40 ΔE 0.067
Use #404D43 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.