#01719D
Closest named color: Ocean Blue (#03719C). oklch(51.7% 0.109 234.5), rgb(1, 113, 157).
Aa
White text reads best on this color (5.45:1).
About this color
#01719D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.109 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.002 away. White text reads best on it, at 5.45:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.85:1 |
| White text | 5.45:1 |
Values
| HEX | #01719D |
| RGB | rgb(1, 113, 157) |
| HSL | hsl(197, 99%, 31%) |
| OKLCH | oklch(51.7% 0.109 234.5) |
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 #01719D | 5.45:1 | AA | Lc -82.0 | Fine for body text |
| Black text on #01719D | 3.85:1 | AA large text | Lc 27.4 | Dividers and decoration only |
| #01719D text on white | 5.45:1 | AA | Lc 76.6 | Fine for body text |
| #01719D text on black | 3.85:1 | 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
#A0C7DE
oklch(80.9% 0.053 234.2)
-
Step 400
400
#6AA9CD
oklch(70.6% 0.084 234.8)
-
Step 500
500
#3B93C1
oklch(63% 0.108 235.1)
-
Step 600
600
#017DAD
oklch(55.6% 0.117 234.4)
-
Step 700
700 (this color)
#01719D
oklch(51.7% 0.109 234.5)
-
Step 800
800
#005679
oklch(42.8% 0.09 234.7)
-
Step 900
900
#114761
oklch(37.7% 0.07 234.5)
-
Step 950
950
#0D2A39
oklch(27.1% 0.044 234.3)
#01719D 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) | #5B709F | 0.066 |
| Deuteranopia (no green cones) | #48649C | 0.053 |
| Tritanopia (no blue cones) | #007D80 | 0.068 |
| Achromatopsia (no color) | #696969 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01719D
#01719D
oklch(51.7% 0.109 234.5)
- #975522
#975522
oklch(51.8% 0.108 54.7)
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 #01719D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.002
- Sea Blue #047495 ΔE 0.018
- Muted Blue #3B719F ΔE 0.030
- Peacock Blue #016795 ΔE 0.030
- Nice Blue #107AB0 ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.038
- Ocean #017B92 ΔE 0.039
- Mid Blue #276AB3 ΔE 0.047
Use #01719D 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.