#3A313A
Closest named color: Onyx (#343A40). oklch(32.6% 0.02 326), rgb(58, 49, 58).
Aa
White text reads best on this color (12.49:1).
About this color
#3A313A is a dark close to neutral grey. In OKLCH its lightness is 33%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.029 away. White text reads best on it, at 12.49:1.
| Hue family | Neutrals |
| Lightness | dark (33%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.68:1 |
| White text | 12.49:1 |
Values
| HEX | #3A313A |
| RGB | rgb(58, 49, 58) |
| HSL | hsl(300, 8%, 21%) |
| OKLCH | oklch(32.6% 0.02 326) |
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 #3A313A | 12.49:1 | AAA | Lc -101.8 | Preferred for body text |
| Black text on #3A313A | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #3A313A text on white | 12.49:1 | AAA | Lc 98.4 | Preferred for body text |
| #3A313A text on black | 1.68:1 | 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
#EBE9EB
oklch(93.6% 0.003 325.6)
-
Step 200
200
#DCD7DC
oklch(88.5% 0.009 325.6)
-
Step 300
300
#C6BDC6
oklch(80.8% 0.016 325.7)
-
Step 400
400
#A99CA9
oklch(70.8% 0.024 325.8)
-
Step 500
500
#948394
oklch(63.1% 0.032 325.9)
-
Step 600
600
#7E6D7E
oklch(55.6% 0.033 326)
-
Step 700
700
#6A5B6A
oklch(49.1% 0.03 326)
-
Step 800
800
#574A57
oklch(42.7% 0.027 326)
-
Step 900
900 (this color)
#3A313A
oklch(32.6% 0.02 326)
-
Step 950
950
#2A242A
oklch(26.9% 0.014 326)
#3A313A 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) | #30333A | 0.018 |
| Deuteranopia (no green cones) | #32343A | 0.016 |
| Tritanopia (no blue cones) | #3B3234 | 0.012 |
| Achromatopsia (no color) | #343434 | 0.020 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A313A
#3A313A
oklch(32.6% 0.02 326)
- #2E372E
#2E372E
oklch(32.5% 0.02 145.1)
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 #3A313A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.029
- Gunmetal #293241 ΔE 0.030
- Space Cadet #2B2D42 ΔE 0.035
- Charcoal Grey #3C4142 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.063
- Midnight Green #073B4C ΔE 0.065
- Jet #212529 ΔE 0.067
Use #3A313A 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.