#121C2A
Closest named color: Rich Black (#0D1B2A). oklch(22.4% 0.031 256.9), rgb(18, 28, 42).
Aa
White text reads best on this color (17.13:1).
About this color
#121C2A is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.031 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.008 away. White text reads best on it, at 17.13:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.22:1 |
| White text | 17.13:1 |
Values
| HEX | #121C2A |
| RGB | rgb(18, 28, 42) |
| HSL | hsl(215, 40%, 12%) |
| OKLCH | oklch(22.4% 0.031 256.9) |
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 #121C2A | 17.13:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #121C2A | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #121C2A text on white | 17.13:1 | AAA | Lc 104.0 | Preferred for body text |
| #121C2A 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D1DAE7
oklch(88.5% 0.02 257.5)
-
Step 300
300
#B2C2D9
oklch(80.9% 0.037 257.4)
-
Step 400
400
#89A2C6
oklch(70.6% 0.06 257.5)
-
Step 500
500
#6C8BB7
oklch(63% 0.076 257.2)
-
Step 600
600
#5475A3
oklch(55.7% 0.081 256.8)
-
Step 700
700
#44628C
oklch(49.1% 0.077 256.9)
-
Step 800
800
#385071
oklch(42.7% 0.063 256.5)
-
Step 900
900
#31425C
oklch(37.6% 0.05 258.7)
-
Step 950
950 (this color)
#121C2A
oklch(22.4% 0.031 256.9)
#121C2A 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) | #171D2B | 0.009 |
| Deuteranopia (no green cones) | #141A2A | 0.008 |
| Tritanopia (no blue cones) | #081F21 | 0.027 |
| Achromatopsia (no color) | #1B1B1B | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121C2A
#121C2A
oklch(22.4% 0.031 256.9)
- #241A0A
#241A0A
oklch(22.6% 0.031 77.8)
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 #121C2A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.008
- Dark #1B2431 ΔE 0.034
- Jet #212529 ΔE 0.044
- Oxford Blue #1B263B ΔE 0.047
- Rich Navy #001219 ΔE 0.058
- Navy Blue #001146 ΔE 0.073
- Almost Black #070D0D ΔE 0.077
- Space Cadet #2B2D42 ΔE 0.082
Use #121C2A 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.