#13487A
Closest named color: Twilight Blue (#0A437A). oklch(39.5% 0.1 251.1), rgb(19, 72, 122).
Aa
White text reads best on this color (9.39:1).
About this color
#13487A is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.100 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.017 away. White text reads best on it, at 9.39:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.23:1 |
| White text | 9.39:1 |
Values
| HEX | #13487A |
| RGB | rgb(19, 72, 122) |
| HSL | hsl(209, 73%, 28%) |
| OKLCH | oklch(39.5% 0.1 251.1) |
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 #13487A | 9.39:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #13487A | 2.23:1 | Fails | Lc 12.6 | Not readable |
| #13487A text on white | 9.39:1 | AAA | Lc 91.3 | Preferred for body text |
| #13487A text on black | 2.23:1 | Fails | Lc -11.0 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C5DCF5
oklch(88.5% 0.042 250.5)
-
Step 300
300
#9DC5F0
oklch(81% 0.075 250.6)
-
Step 400
400
#64A5E9
oklch(70.7% 0.121 250.9)
-
Step 500
500
#348CE2
oklch(63% 0.154 251.3)
-
Step 600
600
#0075CE
oklch(55.7% 0.162 251.1)
-
Step 700
700
#0062AE
oklch(49.1% 0.143 251.1)
-
Step 800
800
#005090
oklch(42.7% 0.125 251.1)
-
Step 900
900 (this color)
#13487A
oklch(39.5% 0.1 251.1)
-
Step 950
950
#0A2844
oklch(27.1% 0.063 250.1)
#13487A 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) | #304B7C | 0.029 |
| Deuteranopia (no green cones) | #1F4279 | 0.018 |
| Tritanopia (no blue cones) | #00545B | 0.074 |
| Achromatopsia (no color) | #464646 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #13487A
#13487A
oklch(39.5% 0.1 251.1)
- #623D00
#623D00
oklch(39.4% 0.085 71.3)
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 #13487A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.017
- Light Navy #155084 ΔE 0.028
- Deep Sea Blue #015482 ΔE 0.036
- Cobalt #1E488F ΔE 0.037
- Dusk Blue #26538D ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.054
- Marine Blue #01386A ΔE 0.056
- Light Navy Blue #2E5A88 ΔE 0.064
Use #13487A 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.