#121B28
Closest named color: Rich Black (#0D1B2A). oklch(22% 0.029 257.5), rgb(18, 27, 40).
Aa
White text reads best on this color (17.31:1).
About this color
#121B28 is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.008 away. White text reads best on it, at 17.31:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.31:1 |
Values
| HEX | #121B28 |
| RGB | rgb(18, 27, 40) |
| HSL | hsl(215, 38%, 11%) |
| OKLCH | oklch(22% 0.029 257.5) |
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 #121B28 | 17.31:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #121B28 | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #121B28 text on white | 17.31:1 | AAA | Lc 104.2 | Preferred for body text |
| #121B28 text on black | 1.21:1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D1DAE6
oklch(88.5% 0.019 255.5)
-
Step 300
300
#B3C2D7
oklch(80.9% 0.034 256.8)
-
Step 400
400
#8BA2C3
oklch(70.6% 0.055 257.4)
-
Step 500
500
#6F8BB4
oklch(63.1% 0.07 257.8)
-
Step 600
600
#5775A0
oklch(55.7% 0.076 257.4)
-
Step 700
700
#476289
oklch(49.2% 0.071 257.5)
-
Step 800
800
#3A506F
oklch(42.7% 0.059 257)
-
Step 900
900
#32425A
oklch(37.6% 0.046 258.3)
-
Step 950
950 (this color)
#121B28
oklch(22% 0.029 257.5)
#121B28 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) | #161C29 | 0.008 |
| Deuteranopia (no green cones) | #141A28 | 0.005 |
| Tritanopia (no blue cones) | #0A1E1F | 0.027 |
| Achromatopsia (no color) | #1B1B1B | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121B28
#121B28
oklch(22% 0.029 257.5)
- #22190A
#22190A
oklch(22% 0.029 79.1)
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 #121B28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.008
- Dark #1B2431 ΔE 0.038
- Jet #212529 ΔE 0.046
- Oxford Blue #1B263B ΔE 0.051
- Rich Navy #001219 ΔE 0.054
- Almost Black #070D0D ΔE 0.072
- Navy Blue #001146 ΔE 0.074
- Space Cadet #2B2D42 ΔE 0.086
Use #121B28 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.