#5577C2
Closest named color: Windows Blue (#3778BF). oklch(57.8% 0.122 264.5), rgb(85, 119, 194).
Aa
Black text reads best on this color (4.80:1).
About this color
#5577C2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.122 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.030 away. Black text reads best on it, at 4.80:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.80:1 |
| White text | 4.37:1 |
Values
| HEX | #5577C2 |
| RGB | rgb(85, 119, 194) |
| HSL | hsl(221, 47%, 55%) |
| OKLCH | oklch(57.8% 0.122 264.5) |
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 #5577C2 | 4.37:1 | AA large text | Lc -75.6 | Fine for body text |
| Black text on #5577C2 | 4.80:1 | AA | Lc 34.0 | Non-text elements, placeholder text |
| #5577C2 text on white | 4.37:1 | AA large text | Lc 70.1 | Content text, not long reading |
| #5577C2 text on black | 4.80:1 | AA | Lc -31.5 | 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
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#CFD9EE
oklch(88.4% 0.031 265.3)
-
Step 300
300
#AFC1E5
oklch(80.9% 0.055 264.2)
-
Step 400
400
#85A0D8
oklch(70.7% 0.088 264.4)
-
Step 500
500
#6788CE
oklch(63.2% 0.112 264.2)
-
Step 600
600 (this color)
#5577C2
oklch(57.8% 0.122 264.5)
-
Step 700
700
#405EA1
oklch(49.2% 0.113 264.4)
-
Step 800
800
#354D82
oklch(42.8% 0.093 264.4)
-
Step 900
900
#2E4069
oklch(37.7% 0.074 265.1)
-
Step 950
950
#1B263D
oklch(27% 0.046 264.1)
#5577C2 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) | #587EC5 | 0.020 |
| Deuteranopia (no green cones) | #4A74C0 | 0.016 |
| Tritanopia (no blue cones) | #0B8793 | 0.109 |
| Achromatopsia (no color) | #797979 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5577C2
#5577C2
oklch(57.8% 0.122 264.5)
- #9A7300
#9A7300
oklch(57.9% 0.119 84.9)
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 #5577C2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.030
- Cool Blue #4984B8 ΔE 0.043
- Steel Blue #4682B4 ΔE 0.044
- French Blue #436BAD ΔE 0.050
- Flat Blue #3C73A8 ΔE 0.051
- Off Blue #5684AE ΔE 0.054
- Water Blue #0E87CC ΔE 0.056
- Nice Blue #107AB0 ΔE 0.060
Use #5577C2 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.