#405755
Closest named color: Dark Slate Gray (#2F4F4F). oklch(43.7% 0.028 189.5), rgb(64, 87, 85).
Aa
White text reads best on this color (7.74:1).
About this color
#405755 is a dark close to neutral grey. In OKLCH its lightness is 44%, its chroma 0.028. 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 7.74:1.
| Hue family | Neutrals |
| Lightness | dark (44%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.71:1 |
| White text | 7.74:1 |
Values
| HEX | #405755 |
| RGB | rgb(64, 87, 85) |
| HSL | hsl(175, 15%, 30%) |
| OKLCH | oklch(43.7% 0.028 189.5) |
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 #405755 | 7.74:1 | AAA | Lc -91.6 | Preferred for body text |
| Black text on #405755 | 2.71:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #405755 text on white | 7.74:1 | AAA | Lc 86.9 | Fine for body text |
| #405755 text on black | 2.71:1 | Fails | Lc -15.2 | Dividers and decoration only |
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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D3DBDA
oklch(88.5% 0.009 188.1)
-
Step 300
300
#B5C4C3
oklch(80.9% 0.017 192)
-
Step 400
400
#8FA6A4
oklch(70.7% 0.026 190.2)
-
Step 500
500
#73908E
oklch(63.1% 0.033 191.2)
-
Step 600
600
#5B7B78
oklch(55.7% 0.037 189)
-
Step 700
700
#4A6765
oklch(49% 0.034 190.8)
-
Step 800
800 (this color)
#405755
oklch(43.7% 0.028 189.5)
-
Step 900
900
#344544
oklch(37.5% 0.022 191.8)
-
Step 950
950
#1F2928
oklch(27.1% 0.014 188.9)
#405755 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) | #545555 | 0.029 |
| Deuteranopia (no green cones) | #505155 | 0.028 |
| Tritanopia (no blue cones) | #395856 | 0.009 |
| Achromatopsia (no color) | #535353 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #405755
#405755
oklch(43.7% 0.028 189.5)
- #604C4E
#604C4E
oklch(43.8% 0.027 11.5)
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 #405755, 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
- Dark Green Blue #1F6357 ΔE 0.046
- Deep Teal #00555A ΔE 0.051
- Petrol #005F6A ΔE 0.051
- YInMn Blue #415A77 ΔE 0.055
- Dark Blue Green #005249 ΔE 0.061
- Dark Aqua #05696B ΔE 0.063
- Slate #516572 ΔE 0.063
Use #405755 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.