#3A353D
Closest named color: Onyx (#343A40). oklch(33.7% 0.015 313), rgb(58, 53, 61).
Aa
White text reads best on this color (11.95:1).
About this color
#3A353D is a dark close to neutral grey. In OKLCH its lightness is 34%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.017 away. White text reads best on it, at 11.95:1.
| Hue family | Neutrals |
| Lightness | dark (34%) |
| Chroma | close to neutral grey (0.015) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.75:1 |
| White text | 11.95:1 |
Values
| HEX | #3A353D |
| RGB | rgb(58, 53, 61) |
| HSL | hsl(278, 7%, 22%) |
| OKLCH | oklch(33.7% 0.015 313) |
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 #3A353D | 11.95:1 | AAA | Lc -101.0 | Preferred for body text |
| Black text on #3A353D | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #3A353D text on white | 11.95:1 | AAA | Lc 97.4 | Preferred for body text |
| #3A353D text on black | 1.75:1 | Fails | Lc 0.0 | 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 900.
-
Step 50
50
#F6F5F6
oklch(97.1% 0.002 325.6)
-
Step 100
100
#EAE9EB
oklch(93.5% 0.003 308.4)
-
Step 200
200
#DAD8DC
oklch(88.5% 0.006 308.4)
-
Step 300
300
#C3BEC6
oklch(80.8% 0.012 313.2)
-
Step 400
400
#A59DA9
oklch(70.7% 0.019 314.7)
-
Step 500
500
#8E8694
oklch(63.2% 0.023 311)
-
Step 600
600
#796F7E
oklch(55.6% 0.026 314.6)
-
Step 700
700
#655D6B
oklch(49.1% 0.024 310.9)
-
Step 800
800
#534C57
oklch(42.7% 0.02 313.4)
-
Step 900
900 (this color)
#3A353D
oklch(33.7% 0.015 313)
-
Step 950
950
#28252A
oklch(27% 0.01 312.1)
#3A353D 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) | #34363D | 0.011 |
| Deuteranopia (no green cones) | #35373D | 0.010 |
| Tritanopia (no blue cones) | #3A3638 | 0.010 |
| Achromatopsia (no color) | #373737 | 0.015 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A353D
#3A353D
oklch(33.7% 0.015 313)
- #343931
#343931
oklch(33.7% 0.015 133.6)
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 #3A353D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.017
- Gunmetal #293241 ΔE 0.032
- Charcoal Grey #3C4142 ΔE 0.038
- Space Cadet #2B2D42 ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.045
- Charcoal #264653 ΔE 0.059
- Midnight Green #073B4C ΔE 0.060
- Prussian Blue #1D3557 ΔE 0.061
Use #3A353D 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.