#121E1F
Closest named color: Rich Black (#0D1B2A). oklch(22.4% 0.017 202.5), rgb(18, 30, 31).
Aa
White text reads best on this color (17.05:1).
About this color
#121E1F is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.028 away. White text reads best on it, at 17.05:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 17.05:1 |
Values
| HEX | #121E1F |
| RGB | rgb(18, 30, 31) |
| HSL | hsl(185, 27%, 10%) |
| OKLCH | oklch(22.4% 0.017 202.5) |
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 #121E1F | 17.05:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #121E1F | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #121E1F text on white | 17.05:1 | AAA | Lc 103.9 | Preferred for body text |
| #121E1F text on black | 1.23:1 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D1DBDC
oklch(88.4% 0.011 204.1)
-
Step 300
300
#B2C5C6
oklch(80.9% 0.021 200.6)
-
Step 400
400
#8AA7A9
oklch(70.7% 0.032 201.6)
-
Step 500
500
#6C9194
oklch(63% 0.041 202.4)
-
Step 600
600
#537B7F
oklch(55.5% 0.045 203.8)
-
Step 700
700
#44686B
oklch(49.1% 0.041 202.5)
-
Step 800
800
#385557
oklch(42.7% 0.035 201.4)
-
Step 900
900
#314648
oklch(37.7% 0.026 203.5)
-
Step 950
950 (this color)
#121E1F
oklch(22.4% 0.017 202.5)
#121E1F 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) | #1C1D1F | 0.017 |
| Deuteranopia (no green cones) | #1A1B1F | 0.016 |
| Tritanopia (no blue cones) | #0D1F1E | 0.008 |
| Achromatopsia (no color) | #1C1C1C | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121E1F
#121E1F
oklch(22.4% 0.017 202.5)
- #231918
#231918
oklch(22.5% 0.016 25)
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 #121E1F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.028
- Jet #212529 ΔE 0.040
- Dark #1B2431 ΔE 0.041
- Rich Navy #001219 ΔE 0.058
- Oxford Blue #1B263B ΔE 0.058
- Almost Black #070D0D ΔE 0.072
- Dark Brown #341C02 ΔE 0.074
- Dark Forest Green #002D04 ΔE 0.083
Use #121E1F 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.