#13183E
Closest named color: Navy Blue (#001146). oklch(23% 0.072 273.6), rgb(19, 24, 62).
Aa
White text reads best on this color (17.10:1).
About this color
#13183E is a very dark, moderately saturated blue. In OKLCH its lightness is 23%, its chroma 0.072 and its hue 274°. 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 17.10:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.22:1 |
| White text | 17.10:1 |
Values
| HEX | #13183E |
| RGB | rgb(19, 24, 62) |
| HSL | hsl(233, 53%, 16%) |
| OKLCH | oklch(23% 0.072 273.6) |
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 #13183E | 17.10:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #13183E | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #13183E text on white | 17.10:1 | AAA | Lc 103.8 | Preferred for body text |
| #13183E 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CFD8F9
oklch(88.6% 0.047 273.4)
-
Step 300
300
#AFBDF9
oklch(80.9% 0.086 274.1)
-
Step 400
400
#8699F5
oklch(70.7% 0.136 273.6)
-
Step 500
500
#6A7CF1
oklch(63% 0.175 273.7)
-
Step 600
600
#5462E0
oklch(55.6% 0.19 273.7)
-
Step 700
700
#4550C3
oklch(49.1% 0.178 273.7)
-
Step 800
800
#38439D
oklch(42.7% 0.145 273.3)
-
Step 900
900
#30397D
oklch(37.6% 0.115 273.9)
-
Step 950
950 (this color)
#13183E
oklch(23% 0.072 273.6)
#13183E 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) | #021E3F | 0.025 |
| Deuteranopia (no green cones) | #001A3D | 0.024 |
| Tritanopia (no blue cones) | #002128 | 0.062 |
| Achromatopsia (no color) | #1C1C1C | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #13183E
#13183E
oklch(23% 0.072 273.6)
- #241C00
#241C00
oklch(22.9% 0.047 94)
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 #13183E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.039
- Rich Black #0D1B2A ΔE 0.043
- Oxford Blue #1B263B ΔE 0.051
- Dark #1B2431 ΔE 0.054
- Dark Indigo #1F0954 ΔE 0.054
- Night Blue #040348 ΔE 0.062
- Midnight Purple #280137 ΔE 0.069
- Jet #212529 ΔE 0.072
Use #13183E 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.