#121F19
Closest named color: Rich Black (#0D1B2A). oklch(22.5% 0.022 164.2), rgb(18, 31, 25).
Aa
White text reads best on this color (16.99:1).
About this color
#121F19 is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.041 away. White text reads best on it, at 16.99:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 16.99:1 |
Values
| HEX | #121F19 |
| RGB | rgb(18, 31, 25) |
| HSL | hsl(152, 27%, 10%) |
| OKLCH | oklch(22.5% 0.022 164.2) |
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 #121F19 | 16.99:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #121F19 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #121F19 text on white | 16.99:1 | AAA | Lc 103.9 | Preferred for body text |
| #121F19 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E6EBE8
oklch(93.5% 0.007 160.1)
-
Step 200
200
#D1DCD7
oklch(88.5% 0.014 167.1)
-
Step 300
300
#B2C6BC
oklch(80.8% 0.026 164.3)
-
Step 400
400
#8AA99A
oklch(70.7% 0.041 164.4)
-
Step 500
500
#6C9481
oklch(63.1% 0.053 164)
-
Step 600
600
#537E6A
oklch(55.5% 0.057 163.8)
-
Step 700
700
#436A59
oklch(49% 0.052 165.1)
-
Step 800
800
#385749
oklch(42.8% 0.044 164.5)
-
Step 900
900
#30483D
oklch(37.8% 0.035 164.5)
-
Step 950
950 (this color)
#121F19
oklch(22.5% 0.022 164.2)
#121F19 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) | #1F1D19 | 0.023 |
| Deuteranopia (no green cones) | #1C1C19 | 0.019 |
| Tritanopia (no blue cones) | #0F1F1D | 0.008 |
| Achromatopsia (no color) | #1C1C1C | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121F19
#121F19
oklch(22.5% 0.022 164.2)
- #23181E
#23181E
oklch(22.5% 0.021 345)
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 #121F19, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.041
- Jet #212529 ΔE 0.044
- Dark #1B2431 ΔE 0.049
- Rich Navy #001219 ΔE 0.062
- Oxford Blue #1B263B ΔE 0.067
- Dark Brown #341C02 ΔE 0.068
- Dark Forest Green #002D04 ΔE 0.071
- Very Dark Green #062E03 ΔE 0.074
Use #121F19 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.