#405656
Closest named color: Dark Slate Gray (#2F4F4F). oklch(43.5% 0.027 196.2), rgb(64, 86, 86).
Aa
White text reads best on this color (7.82:1).
About this color
#405656 is a dark close to neutral grey. In OKLCH its lightness is 44%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.034 away. White text reads best on it, at 7.82:1.
| Hue family | Neutrals |
| Lightness | dark (44%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.68:1 |
| White text | 7.82:1 |
Values
| HEX | #405656 |
| RGB | rgb(64, 86, 86) |
| HSL | hsl(180, 15%, 29%) |
| OKLCH | oklch(43.5% 0.027 196.2) |
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 #405656 | 7.82:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #405656 | 2.68:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #405656 text on white | 7.82:1 | AAA | Lc 87.2 | Fine for body text |
| #405656 text on black | 2.68:1 | Fails | Lc -15.0 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D3DBDB
oklch(88.5% 0.009 197)
-
Step 300
300
#B6C4C4
oklch(81% 0.015 196.9)
-
Step 400
400
#8FA6A6
oklch(70.7% 0.026 196.6)
-
Step 500
500
#739090
oklch(63.1% 0.033 196.4)
-
Step 600
600
#5C7A7A
oklch(55.6% 0.034 196.2)
-
Step 700
700
#4B6767
oklch(49.2% 0.033 196.1)
-
Step 800
800 (this color)
#405656
oklch(43.5% 0.027 196.2)
-
Step 900
900
#354545
oklch(37.7% 0.02 196.3)
-
Step 950
950
#1F2929
oklch(27.1% 0.014 196.4)
#405656 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) | #535456 | 0.028 |
| Deuteranopia (no green cones) | #4F5156 | 0.026 |
| Tritanopia (no blue cones) | #395756 | 0.009 |
| Achromatopsia (no color) | #525252 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #405656
#405656
oklch(43.5% 0.027 196.2)
- #5F4B4C
#5F4B4C
oklch(43.4% 0.027 14.9)
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 #405656, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.034
- Dark Green Blue #1F6357 ΔE 0.049
- Deep Teal #00555A ΔE 0.050
- Petrol #005F6A ΔE 0.051
- YInMn Blue #415A77 ΔE 0.053
- Dark Blue Green #005249 ΔE 0.061
- Dusty Grape #545775 ΔE 0.061
- Slate #516572 ΔE 0.064
Use #405656 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.