#5575C5
Closest named color: Windows Blue (#3778BF). oklch(57.6% 0.129 266), rgb(85, 117, 197).
Aa
Black text reads best on this color (4.73:1).
About this color
#5575C5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.129 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.032 away. Black text reads best on it, at 4.73:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.73:1 |
| White text | 4.43:1 |
Values
| HEX | #5575C5 |
| RGB | rgb(85, 117, 197) |
| HSL | hsl(223, 49%, 55%) |
| OKLCH | oklch(57.6% 0.129 266) |
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 #5575C5 | 4.43:1 | AA large text | Lc -76.1 | Fine for body text |
| Black text on #5575C5 | 4.73:1 | AA | Lc 33.5 | Non-text elements, placeholder text |
| #5575C5 text on white | 4.43:1 | AA large text | Lc 70.6 | Content text, not long reading |
| #5575C5 text on black | 4.73:1 | AA | Lc -31.1 | Non-text elements, placeholder text |
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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#CFD9EF
oklch(88.4% 0.032 266.1)
-
Step 300
300
#AFC0E7
oklch(80.8% 0.058 266.6)
-
Step 400
400
#859FDB
oklch(70.6% 0.093 266)
-
Step 500
500
#6887D1
oklch(63.2% 0.117 265.9)
-
Step 600
600 (this color)
#5575C5
oklch(57.6% 0.129 266)
-
Step 700
700
#405CA4
oklch(49% 0.12 266.1)
-
Step 800
800
#354C85
oklch(42.7% 0.099 265.8)
-
Step 900
900
#2E406B
oklch(37.8% 0.077 265.7)
-
Step 950
950
#1B253E
oklch(26.8% 0.049 266.6)
#5575C5 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) | #537DC8 | 0.021 |
| Deuteranopia (no green cones) | #4573C3 | 0.019 |
| Tritanopia (no blue cones) | #028793 | 0.117 |
| Achromatopsia (no color) | #787878 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5575C5
#5575C5
oklch(57.6% 0.129 266)
- #987300
#987300
oklch(57.6% 0.118 86.1)
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 #5575C5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.032
- French Blue #436BAD ΔE 0.050
- Cool Blue #4984B8 ΔE 0.051
- Steel Blue #4682B4 ΔE 0.051
- Flat Blue #3C73A8 ΔE 0.054
- Water Blue #0E87CC ΔE 0.060
- Royal Blue #4169E1 ΔE 0.061
- Off Blue #5684AE ΔE 0.062
Use #5575C5 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.