#13447D
Closest named color: Twilight Blue (#0A437A). oklch(38.8% 0.109 255), rgb(19, 68, 125).
Aa
White text reads best on this color (9.76:1).
About this color
#13447D is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.109 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.008 away. White text reads best on it, at 9.76:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.15:1 |
| White text | 9.76:1 |
Values
| HEX | #13447D |
| RGB | rgb(19, 68, 125) |
| HSL | hsl(212, 74%, 28%) |
| OKLCH | oklch(38.8% 0.109 255) |
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 #13447D | 9.76:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #13447D | 2.15:1 | Fails | Lc 11.7 | Not readable |
| #13447D text on white | 9.76:1 | AAA | Lc 92.2 | Preferred for body text |
| #13447D text on black | 2.15:1 | Fails | Lc -10.2 | 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
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF8
oklch(88.5% 0.046 256.5)
-
Step 300
300
#9DC4F5
oklch(81% 0.081 254.4)
-
Step 400
400
#66A3F1
oklch(70.7% 0.131 255.2)
-
Step 500
500
#3789EC
oklch(63% 0.169 255.2)
-
Step 600
600
#0271DA
oklch(55.6% 0.182 254.9)
-
Step 700
700
#005EB9
oklch(49% 0.162 255.1)
-
Step 800
800
#014D99
oklch(42.7% 0.14 255.1)
-
Step 900
900 (this color)
#13447D
oklch(38.8% 0.109 255)
-
Step 950
950
#0B2747
oklch(27.1% 0.068 254.1)
#13447D 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) | #26497F | 0.024 |
| Deuteranopia (no green cones) | #103F7C | 0.015 |
| Tritanopia (no blue cones) | #00525A | 0.083 |
| Achromatopsia (no color) | #444444 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #13447D
#13447D
oklch(38.8% 0.109 255)
- #5D3D00
#5D3D00
oklch(38.7% 0.081 75.6)
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 #13447D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.008
- Cobalt #1E488F ΔE 0.033
- Light Navy #155084 ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.047
- Marine Blue #01386A ΔE 0.049
- Dusk Blue #26538D ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.070
Use #13447D 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.