#121D28
Closest named color: Rich Black (#0D1B2A). oklch(22.6% 0.027 249.1), rgb(18, 29, 40).
Aa
White text reads best on this color (17.04:1).
About this color
#121D28 is a very dark close to neutral grey. In OKLCH its lightness is 23%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.012 away. White text reads best on it, at 17.04:1.
| Hue family | Neutrals |
| Lightness | very dark (23%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 17.04:1 |
Values
| HEX | #121D28 |
| RGB | rgb(18, 29, 40) |
| HSL | hsl(210, 38%, 11%) |
| OKLCH | oklch(22.6% 0.027 249.1) |
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 #121D28 | 17.04:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #121D28 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #121D28 text on white | 17.04:1 | AAA | Lc 103.9 | Preferred for body text |
| #121D28 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EAF0
oklch(93.5% 0.01 252.8)
-
Step 200
200
#D1DAE5
oklch(88.5% 0.018 253.4)
-
Step 300
300
#B1C3D5
oklch(80.9% 0.032 248.2)
-
Step 400
400
#89A4BF
oklch(70.8% 0.05 248.5)
-
Step 500
500
#6B8DAF
oklch(63.1% 0.064 248.9)
-
Step 600
600
#52779B
oklch(55.6% 0.07 248.5)
-
Step 700
700
#436484
oklch(49.2% 0.064 248.5)
-
Step 800
800
#37516C
oklch(42.6% 0.055 250.1)
-
Step 900
900
#304457
oklch(37.8% 0.041 247.7)
-
Step 950
950 (this color)
#121D28
oklch(22.6% 0.027 249.1)
#121D28 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) | #191D29 | 0.012 |
| Deuteranopia (no green cones) | #161B28 | 0.009 |
| Tritanopia (no blue cones) | #092021 | 0.023 |
| Achromatopsia (no color) | #1C1C1C | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121D28
#121D28
oklch(22.6% 0.027 249.1)
- #241A0E
#241A0E
oklch(22.7% 0.027 70.9)
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 #121D28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.012
- Dark #1B2431 ΔE 0.032
- Jet #212529 ΔE 0.040
- Oxford Blue #1B263B ΔE 0.047
- Rich Navy #001219 ΔE 0.059
- Almost Black #070D0D ΔE 0.077
- Navy Blue #001146 ΔE 0.078
- Space Cadet #2B2D42 ΔE 0.082
Use #121D28 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.