#5576BB
Closest named color: Windows Blue (#3778BF). oklch(57.2% 0.114 263.8), rgb(85, 118, 187).
Aa
Black text reads best on this color (4.69:1).
About this color
#5576BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.114 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.029 away. Black text reads best on it, at 4.69:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.69:1 |
| White text | 4.47:1 |
Values
| HEX | #5576BB |
| RGB | rgb(85, 118, 187) |
| HSL | hsl(221, 43%, 53%) |
| OKLCH | oklch(57.2% 0.114 263.8) |
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 #5576BB | 4.47:1 | AA large text | Lc -76.4 | Fine for body text |
| Black text on #5576BB | 4.69:1 | AA | Lc 33.2 | Non-text elements, placeholder text |
| #5576BB text on white | 4.47:1 | AA large text | Lc 70.9 | Content text, not long reading |
| #5576BB text on black | 4.69:1 | AA | Lc -30.8 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D0D9ED
oklch(88.5% 0.029 266.4)
-
Step 300
300
#B0C1E3
oklch(80.9% 0.052 264.2)
-
Step 400
400
#86A0D4
oklch(70.6% 0.082 263.8)
-
Step 500
500
#6988C9
oklch(63.1% 0.105 264.2)
-
Step 600
600 (this color)
#5576BB
oklch(57.2% 0.114 263.8)
-
Step 700
700
#415E9C
oklch(49% 0.106 264)
-
Step 800
800
#364D7F
oklch(42.6% 0.088 264.3)
-
Step 900
900
#2F4166
oklch(37.8% 0.068 263.7)
-
Step 950
950
#1B263C
oklch(27% 0.044 263.4)
#5576BB 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) | #5A7CBE | 0.018 |
| Deuteranopia (no green cones) | #4E73BA | 0.012 |
| Tritanopia (no blue cones) | #1C858F | 0.102 |
| Achromatopsia (no color) | #777777 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5576BB
#5576BB
oklch(57.2% 0.114 263.8)
- #98710E
#98710E
oklch(57.3% 0.114 83.5)
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 #5576BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.029
- Steel Blue #4682B4 ΔE 0.040
- Cool Blue #4984B8 ΔE 0.041
- Flat Blue #3C73A8 ΔE 0.042
- French Blue #436BAD ΔE 0.043
- Off Blue #5684AE ΔE 0.049
- Dull Blue #49759C ΔE 0.052
- Nice Blue #107AB0 ΔE 0.054
Use #5576BB 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.