#5580AC
Closest named color: Off Blue (#5684AE). oklch(58.7% 0.083 249.9), rgb(85, 128, 172).
Aa
Black text reads best on this color (5.06:1).
About this color
#5580AC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.083 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.011 away. Black text reads best on it, at 5.06:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.06:1 |
| White text | 4.14:1 |
Values
| HEX | #5580AC |
| RGB | rgb(85, 128, 172) |
| HSL | hsl(210, 34%, 50%) |
| OKLCH | oklch(58.7% 0.083 249.9) |
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 #5580AC | 4.14:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #5580AC | 5.06:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #5580AC text on white | 4.14:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #5580AC text on black | 5.06:1 | AA | Lc -33.3 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EBF1
oklch(93.7% 0.01 247.9)
-
Step 200
200
#CFDBE7
oklch(88.6% 0.021 248.1)
-
Step 300
300
#AFC3D8
oklch(80.9% 0.037 249.6)
-
Step 400
400
#85A4C5
oklch(70.7% 0.059 250.3)
-
Step 500
500
#658DB6
oklch(63% 0.076 249.7)
-
Step 600
600 (this color)
#5580AC
oklch(58.7% 0.083 249.9)
-
Step 700
700
#3D648B
oklch(49.2% 0.077 249.6)
-
Step 800
800
#335171
oklch(42.6% 0.064 251)
-
Step 900
900
#2D445B
oklch(37.8% 0.049 249.2)
-
Step 950
950
#1A2835
oklch(27% 0.031 247.2)
#5580AC 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) | #6E81AE | 0.031 |
| Deuteranopia (no green cones) | #6379AB | 0.024 |
| Tritanopia (no blue cones) | #2B8A8F | 0.071 |
| Achromatopsia (no color) | #7D7D7D | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5580AC
#5580AC
oklch(58.7% 0.083 249.9)
- #9C7343
#9C7343
oklch(58.6% 0.083 69.4)
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 #5580AC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.011
- Steel Blue #4682B4 ΔE 0.018
- Dusty Blue #5A86AD ΔE 0.019
- Cool Blue #4984B8 ΔE 0.021
- Stormy Blue #507B9C ΔE 0.027
- Cerulean #457B9D ΔE 0.032
- Dull Blue #49759C ΔE 0.040
- Faded Blue #658CBB ΔE 0.044
Use #5580AC 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.