#5576BF
Closest named color: Windows Blue (#3778BF). oklch(57.5% 0.119 264.6), rgb(85, 118, 191).
Aa
Black text reads best on this color (4.72:1).
About this color
#5576BF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.119 and its hue 265°. 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 4.72:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.72:1 |
| White text | 4.43:1 |
Values
| HEX | #5576BF |
| RGB | rgb(85, 118, 191) |
| HSL | hsl(221, 45%, 54%) |
| OKLCH | oklch(57.5% 0.119 264.6) |
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 #5576BF | 4.43:1 | AA large text | Lc -76.1 | Fine for body text |
| Black text on #5576BF | 4.72:1 | AA | Lc 33.4 | Non-text elements, placeholder text |
| #5576BF text on white | 4.43:1 | AA large text | Lc 70.6 | Content text, not long reading |
| #5576BF text on black | 4.72:1 | AA | Lc -31.0 | 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
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#CFD9EE
oklch(88.4% 0.031 265.3)
-
Step 300
300
#AFC1E4
oklch(80.9% 0.053 263.7)
-
Step 400
400
#86A0D7
oklch(70.7% 0.086 264.7)
-
Step 500
500
#6888CC
oklch(63.2% 0.109 264.3)
-
Step 600
600 (this color)
#5576BF
oklch(57.5% 0.119 264.6)
-
Step 700
700
#415E9F
oklch(49.1% 0.11 264.6)
-
Step 800
800
#354D81
oklch(42.7% 0.092 264.2)
-
Step 900
900
#2E4068
oklch(37.6% 0.073 264.8)
-
Step 950
950
#1B263D
oklch(27% 0.046 264.1)
#5576BF 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) | #587DC2 | 0.020 |
| Deuteranopia (no green cones) | #4B73BD | 0.015 |
| Tritanopia (no blue cones) | #148691 | 0.107 |
| Achromatopsia (no color) | #787878 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5576BF
#5576BF
oklch(57.5% 0.119 264.6)
- #997200
#997200
oklch(57.5% 0.118 84.7)
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 #5576BF, 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 0.043
- Cool Blue #4984B8 ΔE 0.044
- French Blue #436BAD ΔE 0.046
- Flat Blue #3C73A8 ΔE 0.047
- Off Blue #5684AE ΔE 0.053
- Nice Blue #107AB0 ΔE 0.058
- Dull Blue #49759C ΔE 0.058
Use #5576BF 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.