#5580CE
Closest named color: Cool Blue (#4984B8). oklch(60.5% 0.129 261.5), rgb(85, 128, 206).
Aa
Black text reads best on this color (5.36:1).
About this color
#5580CE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.129 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.041 away. Black text reads best on it, at 5.36:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.36:1 |
| White text | 3.91:1 |
Values
| HEX | #5580CE |
| RGB | rgb(85, 128, 206) |
| HSL | hsl(219, 55%, 57%) |
| OKLCH | oklch(60.5% 0.129 261.5) |
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 #5580CE | 3.91:1 | AA large text | Lc -71.9 | Content text, not long reading |
| Black text on #5580CE | 5.36:1 | AA | Lc 37.7 | Non-text elements, placeholder text |
| #5580CE text on white | 3.91:1 | AA large text | Lc 66.4 | Content text, not long reading |
| #5580CE text on black | 5.36:1 | AA | Lc -35.3 | 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 500.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CDDAF1
oklch(88.6% 0.035 262)
-
Step 300
300
#AAC2EA
oklch(81% 0.063 260.6)
-
Step 400
400
#7DA1E0
oklch(70.7% 0.101 261.2)
-
Step 500
500 (this color)
#5580CE
oklch(60.5% 0.129 261.5)
-
Step 600
600
#4370C4
oklch(55.5% 0.14 261.7)
-
Step 700
700
#355EA9
oklch(49.2% 0.129 261.4)
-
Step 800
800
#2C4D89
oklch(42.7% 0.107 261.3)
-
Step 900
900
#28406E
oklch(37.6% 0.085 262.3)
-
Step 950
950
#172640
oklch(27% 0.053 260.8)
#5580CE 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) | #5F87D1 | 0.023 |
| Deuteranopia (no green cones) | #4F7CCC | 0.014 |
| Tritanopia (no blue cones) | #00919D | 0.112 |
| Achromatopsia (no color) | #818181 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5580CE
#5580CE
oklch(60.5% 0.129 261.5)
- #A77800
#A77800
oklch(60.4% 0.125 81.1)
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 #5580CE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.041
- Windows Blue #3778BF ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.045
- Steel Blue #4682B4 ΔE 0.046
- Water Blue #0E87CC ΔE 0.046
- Soft Blue #6488EA ΔE 0.049
- Faded Blue #658CBB ΔE 0.054
- Off Blue #5684AE ΔE 0.054
Use #5580CE 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.