#121B24
Closest named color: Rich Black (#0D1B2A). oklch(21.8% 0.022 248.9), rgb(18, 27, 36).
Aa
White text reads best on this color (17.38:1).
About this color
#121B24 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 0.013 away. White text reads best on it, at 17.38:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.20:1 |
| White text | 17.38:1 |
Values
| HEX | #121B24 |
| RGB | rgb(18, 27, 36) |
| HSL | hsl(210, 33%, 11%) |
| OKLCH | oklch(21.8% 0.022 248.9) |
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 #121B24 | 17.38:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #121B24 | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #121B24 text on white | 17.38:1 | AAA | Lc 104.2 | Preferred for body text |
| #121B24 text on black | 1.20:1 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE3
oklch(88.5% 0.015 251.2)
-
Step 300
300
#B4C2D1
oklch(80.8% 0.026 250)
-
Step 400
400
#8DA3BA
oklch(70.6% 0.042 249.6)
-
Step 500
500
#708DA9
oklch(63.2% 0.054 247.8)
-
Step 600
600
#587694
oklch(55.4% 0.058 248.9)
-
Step 700
700
#48637E
oklch(48.9% 0.054 249)
-
Step 800
800
#3C5167
oklch(42.7% 0.045 250.1)
-
Step 900
900
#334354
oklch(37.6% 0.036 250.3)
-
Step 950
950 (this color)
#121B24
oklch(21.8% 0.022 248.9)
#121B24 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) | #171B24 | 0.008 |
| Deuteranopia (no green cones) | #151924 | 0.008 |
| Tritanopia (no blue cones) | #0C1D1E | 0.018 |
| Achromatopsia (no color) | #1A1A1A | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121B24
#121B24
oklch(21.8% 0.022 248.9)
- #21180F
#21180F
oklch(21.7% 0.022 66.2)
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 #121B24, 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 0.041
- Jet #212529 ΔE 0.046
- Rich Navy #001219 ΔE 0.051
- Oxford Blue #1B263B ΔE 0.056
- Almost Black #070D0D ΔE 0.068
- Navy Blue #001146 ΔE 0.081
- Dark Brown #341C02 ΔE 0.084
Use #121B24 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.