#5580CF
Closest named color: Cool Blue (#4984B8). oklch(60.5% 0.13 261.7), rgb(85, 128, 207).
Aa
Black text reads best on this color (5.37:1).
About this color
#5580CF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.130 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.042 away. Black text reads best on it, at 5.37:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.37:1 |
| White text | 3.90:1 |
Values
| HEX | #5580CF |
| RGB | rgb(85, 128, 207) |
| HSL | hsl(219, 56%, 57%) |
| OKLCH | oklch(60.5% 0.13 261.7) |
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 #5580CF | 3.90:1 | AA large text | Lc -71.8 | Content text, not long reading |
| Black text on #5580CF | 5.37:1 | AA | Lc 37.8 | Non-text elements, placeholder text |
| #5580CF text on white | 3.90:1 | AA large text | Lc 66.3 | Content text, not long reading |
| #5580CF text on black | 5.37:1 | AA | Lc -35.4 | 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 500.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CCDAF1
oklch(88.5% 0.035 260.4)
-
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)
#5580CF
oklch(60.5% 0.13 261.7)
-
Step 600
600
#4370C5
oklch(55.6% 0.141 261.9)
-
Step 700
700
#345DAA
oklch(49% 0.132 261.7)
-
Step 800
800
#2C4D8A
oklch(42.8% 0.109 261.6)
-
Step 900
900
#27406E
oklch(37.6% 0.085 261.6)
-
Step 950
950
#172641
oklch(27% 0.055 261.4)
#5580CF 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) | #5F87D2 | 0.023 |
| Deuteranopia (no green cones) | #4E7CCD | 0.014 |
| Tritanopia (no blue cones) | #00929D | 0.114 |
| Achromatopsia (no color) | #818181 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5580CF
#5580CF
oklch(60.5% 0.13 261.7)
- #A77900
#A77900
oklch(60.6% 0.125 81.9)
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 #5580CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.044
- Windows Blue #3778BF ΔE 0.045
- Water Blue #0E87CC ΔE 0.046
- Steel Blue #4682B4 ΔE 0.047
- Soft Blue #6488EA ΔE 0.048
- Faded Blue #658CBB ΔE 0.055
- Off Blue #5684AE ΔE 0.055
Use #5580CF 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.