#121928
Closest named color: Rich Black (#0D1B2A). oklch(21.4% 0.032 264.7), rgb(18, 25, 40).
Aa
White text reads best on this color (17.56:1).
About this color
#121928 is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.032 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.009 away. White text reads best on it, at 17.56:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.56:1 |
Values
| HEX | #121928 |
| RGB | rgb(18, 25, 40) |
| HSL | hsl(221, 38%, 11%) |
| OKLCH | oklch(21.4% 0.032 264.7) |
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 #121928 | 17.56:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #121928 | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #121928 text on white | 17.56:1 | AAA | Lc 104.4 | Preferred for body text |
| #121928 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D2D9E7
oklch(88.4% 0.021 264.5)
-
Step 300
300
#B5C1DA
oklch(81% 0.038 265.1)
-
Step 400
400
#8EA1C7
oklch(70.8% 0.06 264.1)
-
Step 500
500
#7289B8
oklch(63% 0.076 264.2)
-
Step 600
600
#5B72A4
oklch(55.5% 0.083 264.9)
-
Step 700
700
#4B608D
oklch(49.2% 0.077 264.6)
-
Step 800
800
#3D4E72
oklch(42.6% 0.064 264.5)
-
Step 900
900
#34415C
oklch(37.6% 0.05 264.3)
-
Step 950
950 (this color)
#121928
oklch(21.4% 0.032 264.7)
#121928 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) | #141A29 | 0.005 |
| Deuteranopia (no green cones) | #111828 | 0.004 |
| Tritanopia (no blue cones) | #0A1C1E | 0.029 |
| Achromatopsia (no color) | #191919 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121928
#121928
oklch(21.4% 0.032 264.7)
- #201807
#201807
oklch(21.4% 0.032 84.7)
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 #121928, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.009
- Dark #1B2431 ΔE 0.044
- Rich Navy #001219 ΔE 0.051
- Jet #212529 ΔE 0.053
- Oxford Blue #1B263B ΔE 0.056
- Almost Black #070D0D ΔE 0.069
- Navy Blue #001146 ΔE 0.071
- Midnight Purple #280137 ΔE 0.084
Use #121928 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.