#13387E
Closest named color: Twilight Blue (#0A437A). oklch(36% 0.126 261.6), rgb(19, 56, 126).
Aa
White text reads best on this color (11.08:1).
About this color
#13387E is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.126 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.033 away. White text reads best on it, at 11.08:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.89:1 |
| White text | 11.08:1 |
Values
| HEX | #13387E |
| RGB | rgb(19, 56, 126) |
| HSL | hsl(219, 74%, 28%) |
| OKLCH | oklch(36% 0.126 261.6) |
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 #13387E | 11.08:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #13387E | 1.89:1 | Fails | Lc 8.8 | Not readable |
| #13387E text on white | 11.08:1 | AAA | Lc 95.1 | Preferred for body text |
| #13387E text on black | 1.89:1 | Fails | Lc -7.5 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C6DAFD
oklch(88.5% 0.053 261.7)
-
Step 300
300
#9FC1FE
oklch(80.8% 0.094 261.9)
-
Step 400
400
#6A9EFE
oklch(70.6% 0.152 261.7)
-
Step 500
500
#4283FC
oklch(63.2% 0.193 261.5)
-
Step 600
600
#2268EC
oklch(55.6% 0.211 261.6)
-
Step 700
700
#1556CD
oklch(49.2% 0.195 261.4)
-
Step 800
800
#1547A6
oklch(42.8% 0.162 261.7)
-
Step 900
900 (this color)
#13387E
oklch(36% 0.126 261.6)
-
Step 950
950
#0F244D
oklch(27% 0.081 262.1)
#13387E 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) | #004180 | 0.025 |
| Deuteranopia (no green cones) | #00377D | 0.012 |
| Tritanopia (no blue cones) | #004955 | 0.097 |
| Achromatopsia (no color) | #3C3C3C | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #13387E
#13387E
oklch(36% 0.126 261.6)
- #513800
#513800
oklch(36% 0.074 80.6)
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 #13387E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.033
- Marine Blue #01386A ΔE 0.037
- Cobalt #1E488F ΔE 0.054
- Marine #042E60 ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.067
- Light Navy #155084 ΔE 0.070
- Dark Slate Blue #483D8B ΔE 0.076
- Sapphire #2138AB ΔE 0.076
Use #13387E 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.