#121B2A
Closest named color: Rich Black (#0D1B2A). oklch(22.1% 0.032 260.3), rgb(18, 27, 42).
Aa
White text reads best on this color (17.27:1).
About this color
#121B2A is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.032 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.007 away. White text reads best on it, at 17.27:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.27:1 |
Values
| HEX | #121B2A |
| RGB | rgb(18, 27, 42) |
| HSL | hsl(218, 40%, 12%) |
| OKLCH | oklch(22.1% 0.032 260.3) |
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 #121B2A | 17.27:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #121B2A | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #121B2A text on white | 17.27:1 | AAA | Lc 104.1 | Preferred for body text |
| #121B2A 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D1DAE8
oklch(88.6% 0.022 259.2)
-
Step 300
300
#B3C2DA
oklch(81% 0.038 259.8)
-
Step 400
400
#8BA2C8
oklch(70.8% 0.062 260.4)
-
Step 500
500
#6E8AB9
oklch(63% 0.078 260.6)
-
Step 600
600
#5674A5
oklch(55.7% 0.084 259.9)
-
Step 700
700
#46618E
oklch(49.1% 0.08 260.3)
-
Step 800
800
#3A4F73
oklch(42.7% 0.066 260.8)
-
Step 900
900
#32425D
oklch(37.8% 0.051 260.6)
-
Step 950
950 (this color)
#121B2A
oklch(22.1% 0.032 260.3)
#121B2A 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) | #151C2B | 0.007 |
| Deuteranopia (no green cones) | #131A2A | 0.004 |
| Tritanopia (no blue cones) | #091E20 | 0.029 |
| Achromatopsia (no color) | #1B1B1B | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121B2A
#121B2A
oklch(22.1% 0.032 260.3)
- #231908
#231908
oklch(22.1% 0.033 79.2)
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 #121B2A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.007
- Dark #1B2431 ΔE 0.037
- Jet #212529 ΔE 0.047
- Oxford Blue #1B263B ΔE 0.049
- Rich Navy #001219 ΔE 0.056
- Navy Blue #001146 ΔE 0.071
- Almost Black #070D0D ΔE 0.075
- Space Cadet #2B2D42 ΔE 0.085
Use #121B2A 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.