#0171A9
Closest named color: Ocean Blue (#03719C). oklch(52.4% 0.122 240.9), rgb(1, 113, 169).
Aa
White text reads best on this color (5.33:1).
About this color
#0171A9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.122 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.021 away. White text reads best on it, at 5.33:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.93:1 |
| White text | 5.33:1 |
Values
| HEX | #0171A9 |
| RGB | rgb(1, 113, 169) |
| HSL | hsl(200, 99%, 33%) |
| OKLCH | oklch(52.4% 0.122 240.9) |
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 #0171A9 | 5.33:1 | AA | Lc -81.3 | Fine for body text |
| Black text on #0171A9 | 3.93:1 | AA large text | Lc 28.1 | Dividers and decoration only |
| #0171A9 text on white | 5.33:1 | AA | Lc 75.9 | Fine for body text |
| #0171A9 text on black | 3.93:1 | AA large text | Lc -25.8 | 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 600.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C8DCEC
oklch(88.4% 0.031 242)
-
Step 300
300
#A2C6E1
oklch(80.9% 0.054 240.8)
-
Step 400
400
#6DA8D2
oklch(70.7% 0.087 240.6)
-
Step 500
500
#4191C7
oklch(63.1% 0.113 241.3)
-
Step 600
600 (this color)
#0171A9
oklch(52.4% 0.122 240.9)
-
Step 700
700
#03679A
oklch(49.1% 0.113 240.8)
-
Step 800
800
#0C547D
oklch(42.6% 0.094 241)
-
Step 900
900
#164664
oklch(37.7% 0.072 240.3)
-
Step 950
950
#0F293B
oklch(27% 0.046 241.6)
#0171A9 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) | #5672AB | 0.059 |
| Deuteranopia (no green cones) | #4065A8 | 0.044 |
| Tritanopia (no blue cones) | #007F85 | 0.081 |
| Achromatopsia (no color) | #6B6B6B | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0171A9
#0171A9
oklch(52.4% 0.122 240.9)
- #9B5601
#9B5601
oklch(52.3% 0.122 60.6)
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 #0171A9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.021
- Nice Blue #107AB0 ΔE 0.028
- Mid Blue #276AB3 ΔE 0.030
- Flat Blue #3C73A8 ΔE 0.032
- Muted Blue #3B719F ΔE 0.032
- Sea Blue #047495 ΔE 0.036
- Peacock Blue #016795 ΔE 0.040
- French Blue #436BAD ΔE 0.040
Use #0171A9 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.