#5475BB
Closest named color: Windows Blue (#3778BF). oklch(57% 0.115 264), rgb(84, 117, 187).
Aa
Black text reads best on this color (4.63:1).
About this color
#5475BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.115 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.028 away. Black text reads best on it, at 4.63:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.63:1 |
| White text | 4.52:1 |
Values
| HEX | #5475BB |
| RGB | rgb(84, 117, 187) |
| HSL | hsl(221, 43%, 53%) |
| OKLCH | oklch(57% 0.115 264) |
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 #5475BB | 4.52:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #5475BB | 4.63:1 | AA | Lc 32.8 | Non-text elements, placeholder text |
| #5475BB text on white | 4.52:1 | AA | Lc 71.3 | Content text, not long reading |
| #5475BB text on black | 4.63:1 | AA | Lc -30.4 | 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
#86A0D5
oklch(70.6% 0.083 264.1)
-
Step 500
500
#6888CA
oklch(63.1% 0.107 263.9)
-
Step 600
600 (this color)
#5475BB
oklch(57% 0.115 264)
-
Step 700
700
#415E9D
oklch(49% 0.107 264.2)
-
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)
#5475BB 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) | #597BBE | 0.018 |
| Deuteranopia (no green cones) | #4C72B9 | 0.013 |
| Tritanopia (no blue cones) | #17848F | 0.103 |
| Achromatopsia (no color) | #767676 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5475BB
#5475BB
oklch(57% 0.115 264)
- #977006
#977006
oklch(56.9% 0.115 83.9)
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 #5475BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.028
- French Blue #436BAD ΔE 0.040
- Flat Blue #3C73A8 ΔE 0.041
- Steel Blue #4682B4 ΔE 0.042
- Cool Blue #4984B8 ΔE 0.044
- Dull Blue #49759C ΔE 0.052
- Off Blue #5684AE ΔE 0.052
- Muted Blue #3B719F ΔE 0.054
Use #5475BB 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.