Ocean Blue #03719C
Ocean Blue is a medium-dark, moderately saturated blue with hex code #03719C and RGB rgb(3, 113, 156).
Aa
White text reads best on this color (5.46:1).
About this color
#03719C is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.107 and its hue 234°. Its hue sits on the cool side of the wheel. It is the named color Ocean Blue. White text reads best on it, at 5.46:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Ocean Blue |
| Black text | 3.84:1 |
| White text | 5.46:1 |
Colors that go with Ocean Blue
Matches found by rotating Ocean Blue around the OKLCH hue wheel, each labelled with the closest name in our list.
Complementary
The opposite hue (180°).
Analogous
Neighbouring hues, 30° either side.
Triadic
Three hues spaced 120° apart.
Color palettes with Ocean Blue
Curated color palettes that contain a color within ΔE 0.06 (OKLab) of Ocean Blue, closest first.
Similar named colors
The eight named colors closest to Ocean Blue, with their ΔE distance.
- Sea Blue #047495 ΔE 0.016
- Muted Blue #3B719F ΔE 0.030
- Peacock Blue #016795 ΔE 0.030
- Flat Blue #3C73A8 ΔE 0.038
- Nice Blue #107AB0 ΔE 0.038
- Ocean #017B92 ΔE 0.038
- Dull Blue #49759C ΔE 0.046
- Denim #3B638C ΔE 0.047
More about Ocean Blue
How to make Ocean Blue
A starting recipe from common paint colors, found with a spectral paint model (the color mixer’s paint mode). Real pigments vary, so mix a small test batch and adjust.
- 3 parts blue
- 1 part green
- 1 part white
Recipe result: #216B98, a difference of ΔE 0.017 from Ocean Blue. That is very close: most people will not see the difference.
Codes for Ocean Blue in every format
| HEX | #03719C |
| RGB | rgb(3, 113, 156) |
| HSL | hsl(197, 96%, 31%) |
| OKLCH | oklch(51.7% 0.107 234) |
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 #03719C | 5.46:1 | AA | Lc -82.0 | Fine for body text |
| Black text on #03719C | 3.84:1 | AA large text | Lc 27.4 | Dividers and decoration only |
| #03719C text on white | 5.46:1 | AA | Lc 76.7 | Fine for body text |
| #03719C text on black | 3.84:1 | AA large text | Lc -25.1 | Dividers and decoration only |
Shades and tints of Ocean Blue
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 700.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C7DDEA
oklch(88.5% 0.03 233.6)
-
Step 300
300
#A0C7DD
oklch(80.9% 0.052 233)
-
Step 400
400
#6AA9CD
oklch(70.6% 0.084 234.8)
-
Step 500
500
#3B94C0
oklch(63.2% 0.106 233.6)
-
Step 600
600
#047DAC
oklch(55.6% 0.115 234)
-
Step 700
700 (this color)
#03719C
oklch(51.7% 0.107 234)
-
Step 800
800
#015678
oklch(42.7% 0.089 234)
-
Step 900
900
#124761
oklch(37.7% 0.07 234.7)
-
Step 950
950
#0D2A39
oklch(27.1% 0.044 234.3)
Ocean Blue 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) | #5C709E | 0.066 |
| Deuteranopia (no green cones) | #49649B | 0.054 |
| Tritanopia (no blue cones) | #007C80 | 0.064 |
| Achromatopsia (no color) | #696969 | 0.107 |
Use Ocean Blue 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.