#03719C
Named color: Ocean Blue. oklch(51.7% 0.107 234), 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 |
Values
| 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 |
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 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)
#03719C 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 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03719C
#03719C
oklch(51.7% 0.107 234)
- #975524
#975524
oklch(51.8% 0.107 54)
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 #03719C, closest first.
Similar named colors
The eight closest entries in our named color list, 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
Use #03719C 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.