#121C49
Closest named color: Navy Blue (#001146). oklch(24.8% 0.085 269.7), rgb(18, 28, 73).
Aa
White text reads best on this color (16.30:1).
About this color
#121C49 is a very dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.085 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.043 away. White text reads best on it, at 16.30:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.28:1 |
| White text | 16.30:1 |
Values
| HEX | #121C49 |
| RGB | rgb(18, 28, 73) |
| HSL | hsl(229, 60%, 18%) |
| OKLCH | oklch(24.8% 0.085 269.7) |
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 #121C49 | 16.30:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #121C49 | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #121C49 text on white | 16.30:1 | AAA | Lc 103.0 | Preferred for body text |
| #121C49 text on black | 1.28:1 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FE
oklch(93.5% 0.029 271.1)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7B9AFF
oklch(70.8% 0.152 269.4)
-
Step 500
500
#5C7CFF
oklch(63.1% 0.197 269.6)
-
Step 600
600
#445FF3
oklch(55.7% 0.223 269.6)
-
Step 700
700
#374CD4
oklch(49.1% 0.208 269.9)
-
Step 800
800
#2D40AB
oklch(42.7% 0.172 269.7)
-
Step 900
900
#273887
oklch(37.7% 0.133 269.7)
-
Step 950
950 (this color)
#121C49
oklch(24.8% 0.085 269.7)
#121C49 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) | #00234B | 0.025 |
| Deuteranopia (no green cones) | #001E48 | 0.020 |
| Tritanopia (no blue cones) | #00272F | 0.069 |
| Achromatopsia (no color) | #202020 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121C49
#121C49
oklch(24.8% 0.085 269.7)
- #2B2000
#2B2000
oklch(25% 0.051 90)
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 #121C49, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.043
- Oxford Blue #1B263B ΔE 0.048
- Dark Indigo #1F0954 ΔE 0.048
- Dark #1B2431 ΔE 0.059
- Rich Black #0D1B2A ΔE 0.061
- Marine #042E60 ΔE 0.064
- Darkblue #030764 ΔE 0.067
- Night Blue #040348 ΔE 0.068
Use #121C49 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.