#13305B
Closest named color: Marine (#042E60). oklch(31.3% 0.085 258.3), rgb(19, 48, 91).
Aa
White text reads best on this color (13.11:1).
About this color
#13305B is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.085 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.016 away. White text reads best on it, at 13.11:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.60:1 |
| White text | 13.11:1 |
Values
| HEX | #13305B |
| RGB | rgb(19, 48, 91) |
| HSL | hsl(216, 65%, 22%) |
| OKLCH | oklch(31.3% 0.085 258.3) |
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 #13305B | 13.11:1 | AAA | Lc -102.4 | Preferred for body text |
| Black text on #13305B | 1.60:1 | Fails | Lc 0.0 | Not readable |
| #13305B text on white | 13.11:1 | AAA | Lc 99.1 | Preferred for body text |
| #13305B text on black | 1.60:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFE
oklch(93.6% 0.029 257.8)
-
Step 200
200
#C3DBFF
oklch(88.5% 0.056 258.4)
-
Step 300
300
#9AC3FF
oklch(81% 0.096 257.8)
-
Step 400
400
#61A0FF
oklch(70.6% 0.154 258.4)
-
Step 500
500
#2F84FF
oklch(63% 0.2 258.5)
-
Step 600
600
#006BEA
oklch(55.6% 0.209 258.4)
-
Step 700
700
#005AC6
oklch(49.1% 0.184 258.2)
-
Step 800
800
#0049A4
oklch(42.7% 0.16 258.3)
-
Step 900
900
#073D87
oklch(37.6% 0.135 258.6)
-
Step 950
950 (this color)
#13305B
oklch(31.3% 0.085 258.3)
#13305B 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) | #1B345D | 0.016 |
| Deuteranopia (no green cones) | #0D2D5A | 0.012 |
| Tritanopia (no blue cones) | #003A41 | 0.065 |
| Achromatopsia (no color) | #303030 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #13305B
#13305B
oklch(31.3% 0.085 258.3)
- #432C00
#432C00
oklch(31.3% 0.065 77.8)
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 #13305B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.016
- Prussian Blue #1D3557 ΔE 0.022
- Marine Blue #01386A ΔE 0.033
- Midnight Green #073B4C ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.051
- Space Cadet #2B2D42 ΔE 0.052
- Gunmetal #293241 ΔE 0.055
- Oxford Blue #1B263B ΔE 0.061
Use #13305B 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.