#3A313B
Closest named color: Onyx (#343A40). oklch(32.7% 0.021 322.9), rgb(58, 49, 59).
Aa
White text reads best on this color (12.48:1).
About this color
#3A313B is a dark close to neutral grey. In OKLCH its lightness is 33%, its chroma 0.021. 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 12.48:1.
| Hue family | Neutrals |
| Lightness | dark (33%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.68:1 |
| White text | 12.48:1 |
Values
| HEX | #3A313B |
| RGB | rgb(58, 49, 59) |
| HSL | hsl(294, 9%, 21%) |
| OKLCH | oklch(32.7% 0.021 322.9) |
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 #3A313B | 12.48:1 | AAA | Lc -101.8 | Preferred for body text |
| Black text on #3A313B | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #3A313B text on white | 12.48:1 | AAA | Lc 98.4 | Preferred for body text |
| #3A313B 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
#EBE9EC
oklch(93.6% 0.005 314.8)
-
Step 200
200
#DCD7DC
oklch(88.5% 0.009 325.6)
-
Step 300
300
#C6BDC7
oklch(80.9% 0.017 322.7)
-
Step 400
400
#A99CAA
oklch(70.8% 0.025 323.7)
-
Step 500
500
#938395
oklch(63% 0.032 322.5)
-
Step 600
600
#7E6D80
oklch(55.7% 0.035 322.7)
-
Step 700
700
#6A5B6C
oklch(49.2% 0.032 322.3)
-
Step 800
800
#564A58
oklch(42.6% 0.027 321.4)
-
Step 900
900 (this color)
#3A313B
oklch(32.7% 0.021 322.9)
-
Step 950
950
#2A242A
oklch(26.9% 0.014 326)
#3A313B 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) | #30333B | 0.018 |
| Deuteranopia (no green cones) | #32343B | 0.016 |
| Tritanopia (no blue cones) | #3A3234 | 0.014 |
| Achromatopsia (no color) | #343434 | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A313B
#3A313B
oklch(32.7% 0.021 322.9)
- #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 #3A313B, 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 0.034
- Charcoal Grey #3C4142 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.062
- Midnight Green #073B4C ΔE 0.065
- Jet #212529 ΔE 0.068
Use #3A313B 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.