#00355E
Closest named color: Marine Blue (#01386A). oklch(32.2% 0.089 248.8), rgb(0, 53, 94).
Aa
White text reads best on this color (12.56:1).
About this color
#00355E is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.089 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.022 away. White text reads best on it, at 12.56:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.67:1 |
| White text | 12.56:1 |
Values
| HEX | #00355E |
| RGB | rgb(0, 53, 94) |
| HSL | hsl(206, 100%, 18%) |
| OKLCH | oklch(32.2% 0.089 248.8) |
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 #00355E | 12.56:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #00355E | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #00355E text on white | 12.56:1 | AAA | Lc 98.0 | Preferred for body text |
| #00355E text on black | 1.67:1 | 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
#EEF6FF
oklch(97% 0.015 251.2)
-
Step 100
100
#DBECFE
oklch(93.6% 0.03 249.7)
-
Step 200
200
#BCDDFF
oklch(88.5% 0.059 249.3)
-
Step 300
300
#8DC6FF
oklch(80.9% 0.1 249.2)
-
Step 400
400
#40A6FF
oklch(70.7% 0.16 248.7)
-
Step 500
500
#008DEC
oklch(63.1% 0.173 248.9)
-
Step 600
600
#0076C8
oklch(55.5% 0.154 249.2)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#004475
oklch(37.8% 0.103 248.3)
-
Step 950
950 (this color)
#00355E
oklch(32.2% 0.089 248.8)
#00355E 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) | #203860 | 0.029 |
| Deuteranopia (no green cones) | #10305D | 0.016 |
| Tritanopia (no blue cones) | #003F44 | 0.064 |
| Achromatopsia (no color) | #333333 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00355E
#00355E
oklch(32.2% 0.089 248.8)
- #4A2C00
#4A2C00
oklch(32.3% 0.07 69.8)
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 #00355E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.022
- Marine #042E60 ΔE 0.022
- Prussian Blue #1D3557 ΔE 0.024
- Midnight Green #073B4C ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.047
- Gunmetal #293241 ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.062
- Twilight Blue #0A437A ΔE 0.062
Use #00355E 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.