#121F15
Closest named color: Rich Black (#0D1B2A). oklch(22.4% 0.027 151), rgb(18, 31, 21).
Aa
White text reads best on this color (17.03:1).
About this color
#121F15 is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.048 away. White text reads best on it, at 17.03:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 17.03:1 |
Values
| HEX | #121F15 |
| RGB | rgb(18, 31, 21) |
| HSL | hsl(134, 27%, 10%) |
| OKLCH | oklch(22.4% 0.027 151) |
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 #121F15 | 17.03:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #121F15 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #121F15 text on white | 17.03:1 | AAA | Lc 103.9 | Preferred for body text |
| #121F15 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
#F3F6F4
oklch(97% 0.004 157.2)
-
Step 100
100
#E6ECE7
oklch(93.7% 0.009 150.7)
-
Step 200
200
#D1DDD3
oklch(88.6% 0.019 150.5)
-
Step 300
300
#B3C7B6
oklch(81% 0.032 149.7)
-
Step 400
400
#8AAA91
oklch(70.7% 0.05 151.5)
-
Step 500
500
#6D9576
oklch(63.1% 0.064 151.2)
-
Step 600
600
#547F5E
oklch(55.5% 0.07 150.9)
-
Step 700
700
#446B4E
oklch(49% 0.064 151.6)
-
Step 800
800
#385840
oklch(42.8% 0.055 151.4)
-
Step 900
900
#314836
oklch(37.7% 0.042 150.7)
-
Step 950
950 (this color)
#121F15
oklch(22.4% 0.027 151)
#121F15 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) | #1F1D14 | 0.023 |
| Deuteranopia (no green cones) | #1D1B16 | 0.024 |
| Tritanopia (no blue cones) | #101F1C | 0.013 |
| Achromatopsia (no color) | #1C1C1C | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121F15
#121F15
oklch(22.4% 0.027 151)
- #231721
#231721
oklch(22.4% 0.026 332.3)
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 #121F15, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.048
- Jet #212529 ΔE 0.048
- Dark #1B2431 ΔE 0.056
- Rich Navy #001219 ΔE 0.064
- Dark Brown #341C02 ΔE 0.066
- Dark Forest Green #002D04 ΔE 0.066
- Very Dark Green #062E03 ΔE 0.069
- Oxford Blue #1B263B ΔE 0.074
Use #121F15 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.