#5573AA
Closest named color: Flat Blue (#3C73A8). oklch(55.6% 0.093 261.9), rgb(85, 115, 170).
Aa
White text reads best on this color (4.75:1).
About this color
#5573AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.093 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.027 away. White text reads best on it, at 4.75:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.41:1 |
| White text | 4.75:1 |
Values
| HEX | #5573AA |
| RGB | rgb(85, 115, 170) |
| HSL | hsl(219, 33%, 50%) |
| OKLCH | oklch(55.6% 0.093 261.9) |
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 #5573AA | 4.75:1 | AA | Lc -78.3 | Fine for body text |
| Black text on #5573AA | 4.41:1 | AA large text | Lc 31.2 | Non-text elements, placeholder text |
| #5573AA text on white | 4.75:1 | AA | Lc 72.9 | Content text, not long reading |
| #5573AA text on black | 4.41:1 | AA large text | Lc -28.8 | Dividers and decoration only |
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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D1DAE9
oklch(88.6% 0.023 260.7)
-
Step 300
300
#B2C1DC
oklch(80.8% 0.042 262.3)
-
Step 400
400
#8AA1CB
oklch(70.7% 0.067 262.3)
-
Step 500
500
#6D8ABE
oklch(63.2% 0.086 261.7)
-
Step 600
600 (this color)
#5573AA
oklch(55.6% 0.093 261.9)
-
Step 700
700
#456092
oklch(49.1% 0.087 262)
-
Step 800
800
#394F76
oklch(42.8% 0.071 261.4)
-
Step 900
900
#31425F
oklch(37.8% 0.055 260.8)
-
Step 950
950
#1D2638
oklch(26.9% 0.036 263.7)
#5573AA 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) | #5E77AC | 0.017 |
| Deuteranopia (no green cones) | #546FA9 | 0.011 |
| Tritanopia (no blue cones) | #307F87 | 0.083 |
| Achromatopsia (no color) | #737373 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5573AA
#5573AA
oklch(55.6% 0.093 261.9)
- #8F6E2B
#8F6E2B
oklch(55.8% 0.094 82.2)
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 #5573AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.027
- Dull Blue #49759C ΔE 0.029
- French Blue #436BAD ΔE 0.034
- Muted Blue #3B719F ΔE 0.035
- Stormy Blue #507B9C ΔE 0.037
- Cerulean #457B9D ΔE 0.038
- Windows Blue #3778BF ΔE 0.041
- Steel Blue #4682B4 ΔE 0.042
Use #5573AA 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.