#03365E
Closest named color: Marine Blue (#01386A). oklch(32.6% 0.086 248.8), rgb(3, 54, 94).
Aa
White text reads best on this color (12.40:1).
About this color
#03365E is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.086 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.021 away. White text reads best on it, at 12.40:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.69:1 |
| White text | 12.40:1 |
Values
| HEX | #03365E |
| RGB | rgb(3, 54, 94) |
| HSL | hsl(206, 94%, 19%) |
| OKLCH | oklch(32.6% 0.086 248.8) |
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 #03365E | 12.40:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #03365E | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #03365E text on white | 12.40:1 | AAA | Lc 97.8 | Preferred for body text |
| #03365E text on black | 1.69:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C7DCF0
oklch(88.5% 0.036 246.9)
-
Step 300
300
#A1C5E9
oklch(81% 0.064 248.6)
-
Step 400
400
#6BA6DF
oklch(70.8% 0.104 248.7)
-
Step 500
500
#3F8ED6
oklch(63.1% 0.133 249)
-
Step 600
600
#1577C3
oklch(55.6% 0.144 248.7)
-
Step 700
700
#0263A8
oklch(49% 0.134 249)
-
Step 800
800
#0B5188
oklch(42.6% 0.111 249)
-
Step 900
900 (this color)
#03365E
oklch(32.6% 0.086 248.8)
-
Step 950
950
#0E2840
oklch(27% 0.055 249)
#03365E 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) | #223860 | 0.028 |
| Deuteranopia (no green cones) | #13315D | 0.017 |
| Tritanopia (no blue cones) | #004045 | 0.063 |
| Achromatopsia (no color) | #343434 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03365E
#03365E
oklch(32.6% 0.086 248.8)
- #4B2C00
#4B2C00
oklch(32.5% 0.071 68.8)
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 #03365E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.021
- Prussian Blue #1D3557 ΔE 0.022
- Marine #042E60 ΔE 0.026
- Midnight Green #073B4C ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.044
- Gunmetal #293241 ΔE 0.059
- Twilight Blue #0A437A ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.061
Use #03365E 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.