#121B18
Closest named color: Rich Black (#0D1B2A). oklch(21.2% 0.014 172.4), rgb(18, 27, 24).
Aa
White text reads best on this color (17.56:1).
About this color
#121B18 is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.014. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.036 away. White text reads best on it, at 17.56:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.014) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.56:1 |
Values
| HEX | #121B18 |
| RGB | rgb(18, 27, 24) |
| HSL | hsl(160, 20%, 9%) |
| OKLCH | oklch(21.2% 0.014 172.4) |
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 #121B18 | 17.56:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #121B18 | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #121B18 text on white | 17.56:1 | AAA | Lc 104.4 | Preferred for body text |
| #121B18 text on black | 1.19:1 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E7EBE9
oklch(93.6% 0.005 165)
-
Step 200
200
#D3DBD8
oklch(88.4% 0.01 171.8)
-
Step 300
300
#B6C4BF
oklch(80.8% 0.017 172.5)
-
Step 400
400
#90A69F
oklch(70.6% 0.027 174.4)
-
Step 500
500
#749187
oklch(63.1% 0.036 172.1)
-
Step 600
600
#5D7B71
oklch(55.7% 0.038 172.4)
-
Step 700
700
#4C685E
oklch(49.2% 0.037 170.8)
-
Step 800
800
#3F544D
oklch(42.6% 0.028 172.5)
-
Step 900
900
#354640
oklch(37.7% 0.024 171.4)
-
Step 950
950 (this color)
#121B18
oklch(21.2% 0.014 172.4)
#121B18 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) | #1A1A18 | 0.014 |
| Deuteranopia (no green cones) | #191918 | 0.014 |
| Tritanopia (no blue cones) | #101B1A | 0.005 |
| Achromatopsia (no color) | #191919 | 0.015 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
This color is close to neutral, so it has no meaningful hue to rotate. Hue harmonies are omitted.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #121B18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.036
- Rich Navy #001219 ΔE 0.050
- Jet #212529 ΔE 0.052
- Dark #1B2431 ΔE 0.055
- Almost Black #070D0D ΔE 0.060
- Oxford Blue #1B263B ΔE 0.073
- Dark Brown #341C02 ΔE 0.073
- Dark Forest Green #002D04 ΔE 0.084
Use #121B18 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.