#121E17
Closest named color: Rich Black (#0D1B2A). oklch(22.1% 0.022 158.4), rgb(18, 30, 23).
Aa
White text reads best on this color (17.15:1).
About this color
#121E17 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 0.043 away. White text reads best on it, at 17.15:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.22:1 |
| White text | 17.15:1 |
Values
| HEX | #121E17 |
| RGB | rgb(18, 30, 23) |
| HSL | hsl(145, 25%, 9%) |
| OKLCH | oklch(22.1% 0.022 158.4) |
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 #121E17 | 17.15:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #121E17 | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #121E17 text on white | 17.15:1 | AAA | Lc 104.0 | Preferred for body text |
| #121E17 text on black | 1.22:1 | 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
#F4F6F4
oklch(97.1% 0.003 145.5)
-
Step 100
100
#E6EBE8
oklch(93.5% 0.007 160.1)
-
Step 200
200
#D2DCD6
oklch(88.5% 0.013 159.9)
-
Step 300
300
#B3C6BA
oklch(80.9% 0.027 158.1)
-
Step 400
400
#8CA997
oklch(70.8% 0.041 157.9)
-
Step 500
500
#6E947E
oklch(63.2% 0.054 159)
-
Step 600
600
#567E67
oklch(55.6% 0.057 158.6)
-
Step 700
700
#466A55
oklch(49% 0.053 158.1)
-
Step 800
800
#3A5746
oklch(42.8% 0.045 158.1)
-
Step 900
900
#32473B
oklch(37.6% 0.033 159.2)
-
Step 950
950 (this color)
#121E17
oklch(22.1% 0.022 158.4)
#121E17 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) | #1E1C17 | 0.021 |
| Deuteranopia (no green cones) | #1C1B17 | 0.020 |
| Tritanopia (no blue cones) | #101E1C | 0.010 |
| Achromatopsia (no color) | #1B1B1B | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121E17
#121E17
oklch(22.1% 0.022 158.4)
- #22171E
#22171E
oklch(22.1% 0.022 340.6)
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 #121E17, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.043
- Jet #212529 ΔE 0.047
- Dark #1B2431 ΔE 0.053
- Rich Navy #001219 ΔE 0.060
- Dark Brown #341C02 ΔE 0.068
- Almost Black #070D0D ΔE 0.070
- Oxford Blue #1B263B ΔE 0.071
- Dark Forest Green #002D04 ΔE 0.072
Use #121E17 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.