#13578A
Closest named color: Dusk Blue (#26538D). oklch(44.3% 0.106 246.7), rgb(19, 87, 138).
Aa
White text reads best on this color (7.61:1).
About this color
#13578A is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.106 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.017 away. White text reads best on it, at 7.61:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.75:1 |
| White text | 7.61:1 |
Values
| HEX | #13578A |
| RGB | rgb(19, 87, 138) |
| HSL | hsl(206, 76%, 31%) |
| OKLCH | oklch(44.3% 0.106 246.7) |
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 #13578A | 7.61:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #13578A | 2.75:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #13578A text on white | 7.61:1 | AAA | Lc 86.0 | Fine for body text |
| #13578A text on black | 2.75:1 | Fails | Lc -16.0 | Dividers and decoration only |
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 800.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCEF
oklch(88.5% 0.034 246.8)
-
Step 300
300
#A1C5E7
oklch(80.9% 0.062 247.1)
-
Step 400
400
#6CA6DB
oklch(70.6% 0.099 247.2)
-
Step 500
500
#408FD1
oklch(63.1% 0.126 246.8)
-
Step 600
600
#1678BE
oklch(55.6% 0.137 246.6)
-
Step 700
700
#0265A4
oklch(49.2% 0.127 246.4)
-
Step 800
800 (this color)
#13578A
oklch(44.3% 0.106 246.7)
-
Step 900
900
#15456A
oklch(37.8% 0.081 245.9)
-
Step 950
950
#0E283E
oklch(26.9% 0.052 246.9)
#13578A 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) | #3F598C | 0.040 |
| Deuteranopia (no green cones) | #2D4F89 | 0.027 |
| Tritanopia (no blue cones) | #00636A | 0.074 |
| Achromatopsia (no color) | #545454 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #13578A
#13578A
oklch(44.3% 0.106 246.7)
- #774700
#774700
oklch(44.4% 0.098 67)
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 #13578A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.017
- Deep Sea Blue #015482 ΔE 0.018
- Light Navy #155084 ΔE 0.022
- Light Navy Blue #2E5A88 ΔE 0.023
- Denim Blue #3B5B92 ΔE 0.040
- Cobalt #1E488F ΔE 0.045
- Peacock Blue #016795 ΔE 0.047
- Denim #3B638C ΔE 0.052
Use #13578A 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.