#121A4A
Closest named color: Navy Blue (#001146). oklch(24.5% 0.089 271), rgb(18, 26, 74).
Aa
White text reads best on this color (16.50:1).
About this color
#121A4A is a very dark, moderately saturated blue. In OKLCH its lightness is 24%, its chroma 0.089 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.039 away. White text reads best on it, at 16.50:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.27:1 |
| White text | 16.50:1 |
Values
| HEX | #121A4A |
| RGB | rgb(18, 26, 74) |
| HSL | hsl(231, 61%, 18%) |
| OKLCH | oklch(24.5% 0.089 271) |
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 #121A4A | 16.50:1 | AAA | Lc -105.7 | Preferred for body text |
| Black text on #121A4A | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #121A4A text on white | 16.50:1 | AAA | Lc 103.2 | Preferred for body text |
| #121A4A text on black | 1.27:1 | 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
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#AABEFF
oklch(81% 0.095 271)
-
Step 400
400
#7E99FF
oklch(70.7% 0.152 270.9)
-
Step 500
500
#607BFF
oklch(63.2% 0.197 271)
-
Step 600
600
#475AF9
oklch(55.5% 0.235 271.1)
-
Step 700
700
#3A48D9
oklch(49% 0.218 271.2)
-
Step 800
800
#2F3DB0
oklch(42.7% 0.181 270.9)
-
Step 900
900
#29368B
oklch(37.7% 0.141 271.3)
-
Step 950
950 (this color)
#121A4A
oklch(24.5% 0.089 271)
#121A4A 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) | #00224C | 0.027 |
| Deuteranopia (no green cones) | #001C49 | 0.020 |
| Tritanopia (no blue cones) | #00262F | 0.072 |
| Achromatopsia (no color) | #1F1F1F | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #121A4A
#121A4A
oklch(24.5% 0.089 271)
- #291F00
#291F00
oklch(24.4% 0.05 91.4)
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 #121A4A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.039
- Dark Indigo #1F0954 ΔE 0.043
- Oxford Blue #1B263B ΔE 0.054
- Night Blue #040348 ΔE 0.062
- Darkblue #030764 ΔE 0.063
- Rich Black #0D1B2A ΔE 0.063
- Dark #1B2431 ΔE 0.064
- Marine #042E60 ΔE 0.068
Use #121A4A 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.