#5583CF
Closest named color: Dark Sky Blue (#448EE4). oklch(61.2% 0.127 260), rgb(85, 131, 207).
Aa
Black text reads best on this color (5.53:1).
About this color
#5583CF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.127 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.039 away. Black text reads best on it, at 5.53:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.53:1 |
| White text | 3.79:1 |
Values
| HEX | #5583CF |
| RGB | rgb(85, 131, 207) |
| HSL | hsl(217, 56%, 57%) |
| OKLCH | oklch(61.2% 0.127 260) |
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 #5583CF | 3.79:1 | AA large text | Lc -70.8 | Content text, not long reading |
| Black text on #5583CF | 5.53:1 | AA | Lc 38.8 | Non-text elements, placeholder text |
| #5583CF text on white | 3.79:1 | AA large text | Lc 65.3 | Content text, not long reading |
| #5583CF text on black | 5.53:1 | AA | Lc -36.4 | 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
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CCDAF0
oklch(88.5% 0.034 259.4)
-
Step 300
300
#AAC2E9
oklch(80.9% 0.061 260.1)
-
Step 400
400
#7CA1DE
oklch(70.6% 0.099 260.1)
-
Step 500
500 (this color)
#5583CF
oklch(61.2% 0.127 260)
-
Step 600
600
#4071C3
oklch(55.5% 0.138 260.1)
-
Step 700
700
#325FA8
oklch(49.2% 0.127 259.6)
-
Step 800
800
#2A4E88
oklch(42.8% 0.105 259.5)
-
Step 900
900
#26416D
oklch(37.7% 0.083 259.7)
-
Step 950
950
#172640
oklch(27% 0.053 260.8)
#5583CF 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) | #6389D2 | 0.024 |
| Deuteranopia (no green cones) | #537ECD | 0.014 |
| Tritanopia (no blue cones) | #00949F | 0.110 |
| Achromatopsia (no color) | #838383 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5583CF
#5583CF
oklch(61.2% 0.127 260)
- #AB7901
#AB7901
oklch(61.1% 0.126 79.6)
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 #5583CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.039
- Cool Blue #4984B8 ΔE 0.039
- Water Blue #0E87CC ΔE 0.044
- Steel Blue #4682B4 ΔE 0.046
- Soft Blue #6488EA ΔE 0.046
- Faded Blue #658CBB ΔE 0.048
- Windows Blue #3778BF ΔE 0.050
- Off Blue #5684AE ΔE 0.052
Use #5583CF 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.