#13749B
Closest named color: Sea Blue (#047495). oklch(52.6% 0.102 232), rgb(19, 116, 155).
Aa
White text reads best on this color (5.25:1).
About this color
#13749B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.102 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.011 away. White text reads best on it, at 5.25:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.99:1 |
| White text | 5.25:1 |
Values
| HEX | #13749B |
| RGB | rgb(19, 116, 155) |
| HSL | hsl(197, 78%, 34%) |
| OKLCH | oklch(52.6% 0.102 232) |
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 #13749B | 5.25:1 | AA | Lc -81.0 | Fine for body text |
| Black text on #13749B | 3.99:1 | AA large text | Lc 28.4 | Dividers and decoration only |
| #13749B text on white | 5.25:1 | AA | Lc 75.6 | Fine for body text |
| #13749B text on black | 3.99:1 | AA large text | Lc -26.1 | 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 600.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#C9DDE7
oklch(88.6% 0.025 229.2)
-
Step 300
300
#A4C7D9
oklch(81% 0.045 230.4)
-
Step 400
400
#70A9C7
oklch(70.7% 0.074 232.2)
-
Step 500
500
#4793B8
oklch(63% 0.093 232)
-
Step 600
600 (this color)
#13749B
oklch(52.6% 0.102 232)
-
Step 700
700
#11698D
oklch(49% 0.095 232.3)
-
Step 800
800
#145672
oklch(42.7% 0.078 231.6)
-
Step 900
900
#19475C
oklch(37.7% 0.061 231.4)
-
Step 950
950
#102A36
oklch(27.1% 0.039 230.5)
#13749B 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) | #60739D | 0.066 |
| Deuteranopia (no green cones) | #4F679A | 0.055 |
| Tritanopia (no blue cones) | #007F81 | 0.061 |
| Achromatopsia (no color) | #6C6C6C | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #13749B
#13749B
oklch(52.6% 0.102 232)
- #98582E
#98582E
oklch(52.6% 0.102 52)
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 #13749B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.011
- Ocean Blue #03719C ΔE 0.011
- Muted Blue #3B719F ΔE 0.027
- Ocean #017B92 ΔE 0.029
- Nice Blue #107AB0 ΔE 0.034
- Flat Blue #3C73A8 ΔE 0.035
- Dull Blue #49759C ΔE 0.039
- Peacock Blue #016795 ΔE 0.040
Use #13749B 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.