#5571AF
Closest named color: French Blue (#436BAD). oklch(55.5% 0.102 264.8), rgb(85, 113, 175).
Aa
White text reads best on this color (4.80:1).
About this color
#5571AF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.102 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.029 away. White text reads best on it, at 4.80:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.36:1 |
| White text | 4.80:1 |
Values
| HEX | #5571AF |
| RGB | rgb(85, 113, 175) |
| HSL | hsl(221, 36%, 51%) |
| OKLCH | oklch(55.5% 0.102 264.8) |
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 #5571AF | 4.80:1 | AA | Lc -78.7 | Fine for body text |
| Black text on #5571AF | 4.36:1 | AA large text | Lc 30.8 | Non-text elements, placeholder text |
| #5571AF text on white | 4.80:1 | AA | Lc 73.2 | Content text, not long reading |
| #5571AF text on black | 4.36:1 | AA large text | Lc -28.4 | 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
#D1D9EB
oklch(88.5% 0.026 266.6)
-
Step 300
300
#B2C1DF
oklch(80.9% 0.046 264.3)
-
Step 400
400
#8AA0CF
oklch(70.6% 0.074 265.1)
-
Step 500
500
#6D88C3
oklch(63% 0.095 265)
-
Step 600
600 (this color)
#5571AF
oklch(55.5% 0.102 264.8)
-
Step 700
700
#465F97
oklch(49.2% 0.095 264.9)
-
Step 800
800
#394E7A
oklch(42.8% 0.078 264)
-
Step 900
900
#314162
oklch(37.7% 0.061 264)
-
Step 950
950
#1D263A
oklch(27% 0.04 265.3)
#5571AF 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) | #5976B2 | 0.015 |
| Deuteranopia (no green cones) | #4F6EAE | 0.012 |
| Tritanopia (no blue cones) | #2C7E88 | 0.091 |
| Achromatopsia (no color) | #727272 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5571AF
#5571AF
oklch(55.5% 0.102 264.8)
- #8E6D1D
#8E6D1D
oklch(55.3% 0.102 84.8)
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 #5571AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.029
- Flat Blue #3C73A8 ΔE 0.030
- Windows Blue #3778BF ΔE 0.037
- Dull Blue #49759C ΔE 0.038
- Muted Blue #3B719F ΔE 0.040
- Stormy Blue #507B9C ΔE 0.047
- Steel Blue #4682B4 ΔE 0.047
- Cerulean #457B9D ΔE 0.048
Use #5571AF 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.