#121B2D
Closest named color: Rich Black (#0D1B2A). oklch(22.3% 0.038 263.4), rgb(18, 27, 45).
Aa
White text reads best on this color (17.20:1).
About this color
#121B2D is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.038 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.010 away. White text reads best on it, at 17.20:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.22:1 |
| White text | 17.20:1 |
Values
| HEX | #121B2D |
| RGB | rgb(18, 27, 45) |
| HSL | hsl(220, 43%, 12%) |
| OKLCH | oklch(22.3% 0.038 263.4) |
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 #121B2D | 17.20:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #121B2D | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #121B2D text on white | 17.20:1 | AAA | Lc 104.0 | Preferred for body text |
| #121B2D text on black | 1.22:1 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D1D9EA
oklch(88.4% 0.025 265.6)
-
Step 300
300
#B2C1DE
oklch(80.9% 0.044 263.6)
-
Step 400
400
#89A1CE
oklch(70.7% 0.072 262.8)
-
Step 500
500
#6C89C1
oklch(63.1% 0.091 263)
-
Step 600
600
#5472AE
oklch(55.6% 0.1 263.3)
-
Step 700
700
#455F95
oklch(49% 0.093 263.8)
-
Step 800
800
#394E79
oklch(42.7% 0.077 263.7)
-
Step 900
900
#314161
oklch(37.7% 0.059 263.5)
-
Step 950
950 (this color)
#121B2D
oklch(22.3% 0.038 263.4)
#121B2D 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) | #141C2E | 0.005 |
| Deuteranopia (no green cones) | #111A2D | 0.004 |
| Tritanopia (no blue cones) | #071F21 | 0.035 |
| Achromatopsia (no color) | #1B1B1B | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121B2D
#121B2D
oklch(22.3% 0.038 263.4)
- #241A05
#241A05
oklch(22.5% 0.038 84)
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 #121B2D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.010
- Dark #1B2431 ΔE 0.036
- Oxford Blue #1B263B ΔE 0.046
- Jet #212529 ΔE 0.048
- Rich Navy #001219 ΔE 0.060
- Navy Blue #001146 ΔE 0.066
- Almost Black #070D0D ΔE 0.079
- Space Cadet #2B2D42 ΔE 0.082
Use #121B2D 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.