#003B68
Closest named color: Marine Blue (#01386A). oklch(34.5% 0.095 249), rgb(0, 59, 104).
Aa
White text reads best on this color (11.50:1).
About this color
#003B68 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.095 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.010 away. White text reads best on it, at 11.50:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.82:1 |
| White text | 11.50:1 |
Values
| HEX | #003B68 |
| RGB | rgb(0, 59, 104) |
| HSL | hsl(206, 100%, 20%) |
| OKLCH | oklch(34.5% 0.095 249) |
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 #003B68 | 11.50:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #003B68 | 1.82:1 | Fails | Lc 8.0 | Not readable |
| #003B68 text on white | 11.50:1 | AAA | Lc 95.9 | Preferred for body text |
| #003B68 text on black | 1.82:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C6DCF3
oklch(88.5% 0.04 249.5)
-
Step 300
300
#9DC5ED
oklch(80.9% 0.071 248.7)
-
Step 400
400
#65A6E5
oklch(70.8% 0.114 249)
-
Step 500
500
#348EDD
oklch(63.1% 0.146 249)
-
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 (this color)
#003B68
oklch(34.5% 0.095 249)
-
Step 950
950
#0A2842
oklch(27% 0.06 248.4)
#003B68 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) | #243E6A | 0.030 |
| Deuteranopia (no green cones) | #123567 | 0.019 |
| Tritanopia (no blue cones) | #00464C | 0.069 |
| Achromatopsia (no color) | #393939 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003B68
#003B68
oklch(34.5% 0.095 249)
- #523100
#523100
oklch(34.6% 0.075 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 #003B68, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.010
- Prussian Blue #1D3557 ΔE 0.035
- Twilight Blue #0A437A ΔE 0.038
- Marine #042E60 ΔE 0.041
- Midnight Green #073B4C ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.058
- Charcoal #264653 ΔE 0.065
Use #003B68 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.