#13366E
Closest named color: Marine Blue (#01386A). oklch(34.2% 0.105 259.6), rgb(19, 54, 110).
Aa
White text reads best on this color (11.79:1).
About this color
#13366E is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.105 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.014 away. White text reads best on it, at 11.79:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.78:1 |
| White text | 11.79:1 |
Values
| HEX | #13366E |
| RGB | rgb(19, 54, 110) |
| HSL | hsl(217, 71%, 25%) |
| OKLCH | oklch(34.2% 0.105 259.6) |
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 #13366E | 11.79:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #13366E | 1.78:1 | Fails | Lc 0.0 | Not readable |
| #13366E text on white | 11.79:1 | AAA | Lc 96.7 | Preferred for body text |
| #13366E text on black | 1.78:1 | 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 900.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DAF7
oklch(88.4% 0.045 259.9)
-
Step 300
300
#A3C2F4
oklch(80.9% 0.079 259.9)
-
Step 400
400
#70A1EF
oklch(70.7% 0.127 259.4)
-
Step 500
500
#4A87EA
oklch(63.1% 0.162 259.6)
-
Step 600
600
#2C6ED8
oklch(55.6% 0.176 259.7)
-
Step 700
700
#1F5BBB
oklch(49% 0.164 259.8)
-
Step 800
800
#1B4B97
oklch(42.6% 0.135 259.5)
-
Step 900
900 (this color)
#13366E
oklch(34.2% 0.105 259.6)
-
Step 950
950
#112647
oklch(27.1% 0.067 259.1)
#13366E 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) | #163C70 | 0.019 |
| Deuteranopia (no green cones) | #00346D | 0.014 |
| Tritanopia (no blue cones) | #00434C | 0.081 |
| Achromatopsia (no color) | #383838 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #13366E
#13366E
oklch(34.2% 0.105 259.6)
- #4C3300
#4C3300
oklch(34.2% 0.071 78.6)
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 #13366E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.014
- Marine #042E60 ΔE 0.037
- Prussian Blue #1D3557 ΔE 0.041
- Twilight Blue #0A437A ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.064
- Midnight Green #073B4C ΔE 0.067
- Dark Grey Blue #29465B ΔE 0.071
- Midnight Blue #191970 ΔE 0.072
Use #13366E 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.