#121924
Closest named color: Rich Black (#0D1B2A). oklch(21.2% 0.024 259.3), rgb(18, 25, 36).
Aa
White text reads best on this color (17.64:1).
About this color
#121924 is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.013 away. White text reads best on it, at 17.64:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.64:1 |
Values
| HEX | #121924 |
| RGB | rgb(18, 25, 36) |
| HSL | hsl(217, 33%, 11%) |
| OKLCH | oklch(21.2% 0.024 259.3) |
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 #121924 | 17.64:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #121924 | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #121924 text on white | 17.64:1 | AAA | Lc 104.4 | Preferred for body text |
| #121924 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D3DAE4
oklch(88.6% 0.016 257.2)
-
Step 300
300
#B6C1D4
oklch(80.8% 0.029 261.5)
-
Step 400
400
#90A2BE
oklch(70.8% 0.046 259.2)
-
Step 500
500
#748BAE
oklch(63.2% 0.059 258.7)
-
Step 600
600
#5D7499
oklch(55.5% 0.064 259.7)
-
Step 700
700
#4C6183
oklch(49% 0.061 259.9)
-
Step 800
800
#3F506A
oklch(42.8% 0.048 258.7)
-
Step 900
900
#354256
oklch(37.6% 0.038 258.9)
-
Step 950
950 (this color)
#121924
oklch(21.2% 0.024 259.3)
#121924 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) | #151A24 | 0.007 |
| Deuteranopia (no green cones) | #131824 | 0.004 |
| Tritanopia (no blue cones) | #0C1B1D | 0.020 |
| Achromatopsia (no color) | #191919 | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121924
#121924
oklch(21.2% 0.024 259.3)
- #1F170C
#1F170C
oklch(21.1% 0.024 74.8)
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 #121924, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.013
- Dark #1B2431 ΔE 0.046
- Rich Navy #001219 ΔE 0.047
- Jet #212529 ΔE 0.052
- Oxford Blue #1B263B ΔE 0.060
- Almost Black #070D0D ΔE 0.063
- Navy Blue #001146 ΔE 0.078
- Dark Brown #341C02 ΔE 0.088
Use #121924 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.