#00345B
Closest named color: Marine (#042E60). oklch(31.7% 0.086 248.1), rgb(0, 52, 91).
Aa
White text reads best on this color (12.78:1).
About this color
#00345B is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.086 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.022 away. White text reads best on it, at 12.78:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.64:1 |
| White text | 12.78:1 |
Values
| HEX | #00345B |
| RGB | rgb(0, 52, 91) |
| HSL | hsl(206, 100%, 18%) |
| OKLCH | oklch(31.7% 0.086 248.1) |
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 #00345B | 12.78:1 | AAA | Lc -101.8 | Preferred for body text |
| Black text on #00345B | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #00345B text on white | 12.78:1 | AAA | Lc 98.4 | Preferred for body text |
| #00345B text on black | 1.64:1 | 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
#EFF6FE
oklch(97% 0.013 251.6)
-
Step 100
100
#DBECFD
oklch(93.6% 0.029 248.1)
-
Step 200
200
#BDDDFD
oklch(88.5% 0.056 248.5)
-
Step 300
300
#8BC7FF
oklch(81% 0.101 247.5)
-
Step 400
400
#3DA6FF
oklch(70.6% 0.161 248.2)
-
Step 500
500
#008EEA
oklch(63.2% 0.17 248)
-
Step 600
600
#0077C6
oklch(55.6% 0.15 248.2)
-
Step 700
700
#0064A7
oklch(49.1% 0.132 247.9)
-
Step 800
800
#00528A
oklch(42.8% 0.115 247.8)
-
Step 900
900
#004474
oklch(37.7% 0.101 247.8)
-
Step 950
950 (this color)
#00345B
oklch(31.7% 0.086 248.1)
#00345B 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) | #20365D | 0.028 |
| Deuteranopia (no green cones) | #112F5A | 0.017 |
| Tritanopia (no blue cones) | #003D43 | 0.059 |
| Achromatopsia (no color) | #323232 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00345B
#00345B
oklch(31.7% 0.086 248.1)
- #492A00
#492A00
oklch(31.7% 0.07 67.7)
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 #00345B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.022
- Prussian Blue #1D3557 ΔE 0.024
- Marine Blue #01386A ΔE 0.028
- Midnight Green #073B4C ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.046
- Gunmetal #293241 ΔE 0.057
- Space Cadet #2B2D42 ΔE 0.058
- Oxford Blue #1B263B ΔE 0.067
Use #00345B 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.