#312121
Closest named color: Jet (#212529). oklch(26.7% 0.025 18.8), rgb(49, 33, 33).
Aa
White text reads best on this color (15.32:1).
About this color
#312121 is a dark close to neutral grey. In OKLCH its lightness is 27%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Jet (#212529), ΔE 0.032 away. White text reads best on it, at 15.32:1.
| Hue family | Neutrals |
| Lightness | dark (27%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Jet (#212529) |
| Black text | 1.37:1 |
| White text | 15.32:1 |
Values
| HEX | #312121 |
| RGB | rgb(49, 33, 33) |
| HSL | hsl(0, 20%, 16%) |
| OKLCH | oklch(26.7% 0.025 18.8) |
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 #312121 | 15.32:1 | AAA | Lc -104.9 | Preferred for body text |
| Black text on #312121 | 1.37:1 | Fails | Lc 0.0 | Not readable |
| #312121 text on white | 15.32:1 | AAA | Lc 102.2 | Preferred for body text |
| #312121 text on black | 1.37:1 | 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 950.
-
Step 50
50
#F8F4F4
oklch(97% 0.004 17.2)
-
Step 100
100
#EFE8E7
oklch(93.6% 0.008 27.2)
-
Step 200
200
#E4D5D5
oklch(88.5% 0.017 17.5)
-
Step 300
300
#D3B9B9
oklch(80.8% 0.03 17.8)
-
Step 400
400
#BC9595
oklch(70.6% 0.047 18.3)
-
Step 500
500
#AB7B7B
oklch(63.1% 0.06 18.9)
-
Step 600
600
#966464
oklch(55.6% 0.065 19.3)
-
Step 700
700
#805353
oklch(49.2% 0.061 19.5)
-
Step 800
800
#684444
oklch(42.8% 0.05 19.3)
-
Step 900
900
#553939
oklch(37.7% 0.04 19.1)
-
Step 950
950 (this color)
#312121
oklch(26.7% 0.025 18.8)
#312121 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) | #242321 | 0.026 |
| Deuteranopia (no green cones) | #282621 | 0.023 |
| Tritanopia (no blue cones) | #341F21 | 0.009 |
| Achromatopsia (no color) | #252525 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #312121
#312121
oklch(26.7% 0.025 18.8)
- #172A2A
#172A2A
oklch(26.9% 0.025 195.8)
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 #312121, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Jet #212529 ΔE 0.032
- Dark Brown #341C02 ΔE 0.043
- Dark #1B2431 ΔE 0.047
- Chocolate Brown #411900 ΔE 0.052
- Oxford Blue #1B263B ΔE 0.058
- Space Cadet #2B2D42 ΔE 0.061
- Gunmetal #293241 ΔE 0.067
- Rich Black #0D1B2A ΔE 0.074
Use #312121 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.