#121D29
Closest named color: Rich Black (#0D1B2A). oklch(22.6% 0.028 251.3), rgb(18, 29, 41).
Aa
White text reads best on this color (17.02:1).
About this color
#121D29 is a very dark close to neutral grey. In OKLCH its lightness is 23%, its chroma 0.028. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.011 away. White text reads best on it, at 17.02:1.
| Hue family | Neutrals |
| Lightness | very dark (23%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 17.02:1 |
Values
| HEX | #121D29 |
| RGB | rgb(18, 29, 41) |
| HSL | hsl(211, 39%, 12%) |
| OKLCH | oklch(22.6% 0.028 251.3) |
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 #121D29 | 17.02:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #121D29 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #121D29 text on white | 17.02:1 | AAA | Lc 103.9 | Preferred for body text |
| #121D29 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
#D0DAE5
oklch(88.4% 0.019 250.6)
-
Step 300
300
#B1C3D6
oklch(81% 0.033 249.7)
-
Step 400
400
#88A3C2
oklch(70.6% 0.055 252.1)
-
Step 500
500
#6B8DB2
oklch(63.2% 0.068 251)
-
Step 600
600
#52769E
oklch(55.5% 0.075 251.8)
-
Step 700
700
#426387
oklch(49% 0.07 251.4)
-
Step 800
800
#37516E
oklch(42.7% 0.058 251.9)
-
Step 900
900
#304359
oklch(37.7% 0.045 252.6)
-
Step 950
950 (this color)
#121D29
oklch(22.6% 0.028 251.3)
#121D29 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) | #181D2A | 0.010 |
| Deuteranopia (no green cones) | #151B29 | 0.008 |
| Tritanopia (no blue cones) | #092021 | 0.025 |
| Achromatopsia (no color) | #1C1C1C | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121D29
#121D29
oklch(22.6% 0.028 251.3)
- #241A0D
#241A0D
oklch(22.6% 0.028 72.9)
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 #121D29, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.011
- Dark #1B2431 ΔE 0.032
- Jet #212529 ΔE 0.040
- Oxford Blue #1B263B ΔE 0.045
- Rich Navy #001219 ΔE 0.059
- Navy Blue #001146 ΔE 0.076
- Almost Black #070D0D ΔE 0.078
- Space Cadet #2B2D42 ΔE 0.081
Use #121D29 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.