#003363
Closest named color: Marine (#042E60). oklch(32.1% 0.098 252.8), rgb(0, 51, 99).
Aa
White text reads best on this color (12.69:1).
About this color
#003363 is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.098 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.015 away. White text reads best on it, at 12.69:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.65:1 |
| White text | 12.69:1 |
Values
| HEX | #003363 |
| RGB | rgb(0, 51, 99) |
| HSL | hsl(209, 100%, 19%) |
| OKLCH | oklch(32.1% 0.098 252.8) |
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 #003363 | 12.69:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #003363 | 1.65:1 | Fails | Lc 0.0 | Not readable |
| #003363 text on white | 12.69:1 | AAA | Lc 98.2 | Preferred for body text |
| #003363 text on black | 1.65:1 | 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
#EFF6FF
oklch(97% 0.014 254.6)
-
Step 100
100
#DCECFF
oklch(93.7% 0.031 252.7)
-
Step 200
200
#BFDCFF
oklch(88.5% 0.058 253.3)
-
Step 300
300
#93C5FF
oklch(81% 0.098 252.7)
-
Step 400
400
#50A4FF
oklch(70.8% 0.157 252.5)
-
Step 500
500
#0089F9
oklch(63% 0.193 252.8)
-
Step 600
600
#0073D3
oklch(55.6% 0.171 252.9)
-
Step 700
700
#0061B2
oklch(49.2% 0.149 252.5)
-
Step 800
800
#004F93
oklch(42.7% 0.13 252.6)
-
Step 900
900
#00417C
oklch(37.6% 0.116 253)
-
Step 950
950 (this color)
#003363
oklch(32.1% 0.098 252.8)
#003363 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) | #183765 | 0.023 |
| Deuteranopia (no green cones) | #002F62 | 0.012 |
| Tritanopia (no blue cones) | #003F46 | 0.073 |
| Achromatopsia (no color) | #333333 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003363
#003363
oklch(32.1% 0.098 252.8)
- #482C00
#482C00
oklch(32% 0.069 71.9)
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 #003363, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.015
- Marine Blue #01386A ΔE 0.019
- Prussian Blue #1D3557 ΔE 0.032
- Midnight Green #073B4C ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.057
- Twilight Blue #0A437A ΔE 0.061
- Space Cadet #2B2D42 ΔE 0.069
- Gunmetal #293241 ΔE 0.069
Use #003363 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.