#05366E
Closest named color: Marine Blue (#01386A). oklch(33.9% 0.109 255.9), rgb(5, 54, 110).
Aa
White text reads best on this color (11.93:1).
About this color
#05366E is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.109 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.010 away. White text reads best on it, at 11.93:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.75:1 |
| White text | 11.93:1 |
Values
| HEX | #05366E |
| RGB | rgb(5, 54, 110) |
| HSL | hsl(212, 91%, 23%) |
| OKLCH | oklch(33.9% 0.109 255.9) |
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 #05366E | 11.93:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #05366E | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #05366E text on white | 11.93:1 | AAA | Lc 96.8 | Preferred for body text |
| #05366E text on black | 1.75:1 | 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 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
#C6DBF7
oklch(88.5% 0.045 255.6)
-
Step 300
300
#9EC3F5
oklch(80.8% 0.082 256.1)
-
Step 400
400
#68A3F1
oklch(70.8% 0.131 255.9)
-
Step 500
500
#3B89EC
oklch(63.1% 0.167 256)
-
Step 600
600
#0F70DA
oklch(55.6% 0.182 255.9)
-
Step 700
700
#005DBC
oklch(49% 0.167 256)
-
Step 800
800
#074D99
oklch(42.8% 0.139 255.8)
-
Step 900
900 (this color)
#05366E
oklch(33.9% 0.109 255.9)
-
Step 950
950
#0D2647
oklch(26.9% 0.069 256.4)
#05366E 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) | #143C70 | 0.022 |
| Deuteranopia (no green cones) | #00336D | 0.010 |
| Tritanopia (no blue cones) | #00444C | 0.083 |
| Achromatopsia (no color) | #373737 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05366E
#05366E
oklch(33.9% 0.109 255.9)
- #4C3100
#4C3100
oklch(33.7% 0.071 75.5)
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 #05366E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.010
- Marine #042E60 ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.043
- Twilight Blue #0A437A ΔE 0.043
- Midnight Green #073B4C ΔE 0.066
- Dark Blue Grey #1F3B4D ΔE 0.066
- Midnight Blue #191970 ΔE 0.071
- Dark Grey Blue #29465B ΔE 0.075
Use #05366E 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.