#5171AE
Closest named color: French Blue (#436BAD). oklch(55.2% 0.103 262.5), rgb(81, 113, 174).
Aa
White text reads best on this color (4.85:1).
About this color
#5171AE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.103 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.025 away. White text reads best on it, at 4.85:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.32:1 |
| White text | 4.85:1 |
Values
| HEX | #5171AE |
| RGB | rgb(81, 113, 174) |
| HSL | hsl(219, 36%, 50%) |
| OKLCH | oklch(55.2% 0.103 262.5) |
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 #5171AE | 4.85:1 | AA | Lc -79.0 | Fine for body text |
| Black text on #5171AE | 4.32:1 | AA large text | Lc 30.5 | Non-text elements, placeholder text |
| #5171AE text on white | 4.85:1 | AA | Lc 73.6 | Content text, not long reading |
| #5171AE text on black | 4.32:1 | AA large text | Lc -28.1 | 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 600.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0DAEB
oklch(88.6% 0.026 261.1)
-
Step 300
300
#B1C1DF
oklch(80.9% 0.046 263)
-
Step 400
400
#88A1CF
oklch(70.7% 0.073 262.4)
-
Step 500
500
#6A89C3
oklch(63% 0.095 262.4)
-
Step 600
600 (this color)
#5171AE
oklch(55.2% 0.103 262.5)
-
Step 700
700
#436097
oklch(49.2% 0.095 262.3)
-
Step 800
800
#374E7A
oklch(42.6% 0.079 262.5)
-
Step 900
900
#304162
oklch(37.6% 0.061 262.9)
-
Step 950
950
#1C263A
oklch(26.9% 0.04 263.6)
#5171AE 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) | #5976B1 | 0.018 |
| Deuteranopia (no green cones) | #4E6DAD | 0.012 |
| Tritanopia (no blue cones) | #217E87 | 0.092 |
| Achromatopsia (no color) | #717171 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5171AE
#5171AE
oklch(55.2% 0.103 262.5)
- #8F6B1C
#8F6B1C
oklch(55% 0.102 82.4)
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 #5171AE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.025
- Flat Blue #3C73A8 ΔE 0.025
- Muted Blue #3B719F ΔE 0.035
- Dull Blue #49759C ΔE 0.035
- Windows Blue #3778BF ΔE 0.035
- Stormy Blue #507B9C ΔE 0.046
- Cerulean #457B9D ΔE 0.046
- Steel Blue #4682B4 ΔE 0.047
Use #5171AE 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.