#00518D
Closest named color: Light Navy (#155084). oklch(42.7% 0.12 249.5), rgb(0, 81, 141).
Aa
White text reads best on this color (8.19:1).
About this color
#00518D is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.120 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.016 away. White text reads best on it, at 8.19:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.56:1 |
| White text | 8.19:1 |
Values
| HEX | #00518D |
| RGB | rgb(0, 81, 141) |
| HSL | hsl(206, 100%, 28%) |
| OKLCH | oklch(42.7% 0.12 249.5) |
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 #00518D | 8.19:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #00518D | 2.56:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #00518D text on white | 8.19:1 | AAA | Lc 87.7 | Fine for body text |
| #00518D text on black | 2.56:1 | Fails | Lc -14.4 | 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 800.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C6DCF2
oklch(88.5% 0.038 248.3)
-
Step 300
300
#9EC5ED
oklch(80.9% 0.071 249.4)
-
Step 400
400
#67A6E3
oklch(70.8% 0.111 248.9)
-
Step 500
500
#388EDC
oklch(63.2% 0.143 249.4)
-
Step 600
600
#0176C9
oklch(55.6% 0.155 249.5)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800 (this color)
#00518D
oklch(42.7% 0.12 249.5)
-
Step 900
900
#104470
oklch(37.8% 0.092 248.9)
-
Step 950
950
#0C2842
oklch(27.1% 0.059 249.5)
#00518D 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) | #32558F | 0.036 |
| Deuteranopia (no green cones) | #1A4A8C | 0.021 |
| Tritanopia (no blue cones) | #006068 | 0.087 |
| Achromatopsia (no color) | #4F4F4F | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00518D
#00518D
oklch(42.7% 0.12 249.5)
- #6F4400
#6F4400
oklch(42.7% 0.093 69.4)
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 #00518D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.016
- Deep Sea Blue #015482 ΔE 0.022
- Dusk Blue #26538D ΔE 0.022
- Cobalt #1E488F ΔE 0.028
- Light Navy Blue #2E5A88 ΔE 0.043
- Twilight Blue #0A437A ΔE 0.048
- Denim Blue #3B5B92 ΔE 0.055
- Peacock Blue #016795 ΔE 0.066
Use #00518D 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.