#13509B
Closest named color: Cobalt (#1E488F). oklch(43.8% 0.136 256.5), rgb(19, 80, 155).
Aa
White text reads best on this color (7.92:1).
About this color
#13509B is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.136 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.027 away. White text reads best on it, at 7.92:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.64:1 |
| White text | 7.92:1 |
Values
| HEX | #13509B |
| RGB | rgb(19, 80, 155) |
| HSL | hsl(213, 78%, 34%) |
| OKLCH | oklch(43.8% 0.136 256.5) |
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 #13509B | 7.92:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #13509B | 2.64:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #13509B text on white | 7.92:1 | AAA | Lc 87.0 | Fine for body text |
| #13509B text on black | 2.64:1 | Fails | Lc -15.1 | 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 800.
-
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
#C7DBF7
oklch(88.5% 0.044 256.8)
-
Step 300
300
#9FC3F4
oklch(80.8% 0.08 256.2)
-
Step 400
400
#6AA2EF
oklch(70.6% 0.128 256.6)
-
Step 500
500
#4089EA
oklch(63.2% 0.163 256.6)
-
Step 600
600
#1A70D8
oklch(55.6% 0.178 256.5)
-
Step 700
700
#0A5DBB
oklch(49% 0.165 256.5)
-
Step 800
800 (this color)
#13509B
oklch(43.8% 0.136 256.5)
-
Step 900
900
#154178
oklch(37.7% 0.105 256)
-
Step 950
950
#0E2647
oklch(27% 0.068 257.1)
#13509B 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) | #25579E | 0.025 |
| Deuteranopia (no green cones) | #004C9A | 0.015 |
| Tritanopia (no blue cones) | #00626E | 0.102 |
| Achromatopsia (no color) | #515151 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #13509B
#13509B
oklch(43.8% 0.136 256.5)
- #6E4A00
#6E4A00
oklch(43.8% 0.092 76.9)
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 #13509B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.027
- Dusk Blue #26538D ΔE 0.029
- Light Navy #155084 ΔE 0.038
- Deep Sea Blue #015482 ΔE 0.046
- Light Navy Blue #2E5A88 ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.053
- Blueberry #464196 ΔE 0.060
- Twilight Blue #0A437A ΔE 0.064
Use #13509B 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.