#5583BC
Closest named color: Cool Blue (#4984B8). oklch(60.2% 0.101 254.5), rgb(85, 131, 188).
Aa
Black text reads best on this color (5.35:1).
About this color
#5583BC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.101 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.014 away. Black text reads best on it, at 5.35:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.35:1 |
| White text | 3.91:1 |
Values
| HEX | #5583BC |
| RGB | rgb(85, 131, 188) |
| HSL | hsl(213, 43%, 54%) |
| OKLCH | oklch(60.2% 0.101 254.5) |
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 #5583BC | 3.91:1 | AA large text | Lc -72.0 | Content text, not long reading |
| Black text on #5583BC | 5.35:1 | AA | Lc 37.6 | Non-text elements, placeholder text |
| #5583BC text on white | 3.91:1 | AA large text | Lc 66.5 | Content text, not long reading |
| #5583BC text on black | 5.35:1 | AA | Lc -35.2 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E4EBF4
oklch(93.7% 0.014 254.6)
-
Step 200
200
#CDDBEB
oklch(88.6% 0.027 251.7)
-
Step 300
300
#ABC3E1
oklch(80.9% 0.05 254.1)
-
Step 400
400
#7FA3D2
oklch(70.7% 0.08 255.3)
-
Step 500
500 (this color)
#5583BC
oklch(60.2% 0.101 254.5)
-
Step 600
600
#4375B2
oklch(55.6% 0.11 254.4)
-
Step 700
700
#356299
oklch(49.1% 0.102 254.5)
-
Step 800
800
#2C507C
oklch(42.6% 0.085 254.4)
-
Step 900
900
#284364
oklch(37.8% 0.066 254.2)
-
Step 950
950
#18273B
oklch(27% 0.043 255.9)
#5583BC 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) | #6C86BE | 0.029 |
| Deuteranopia (no green cones) | #5F7CBB | 0.021 |
| Tritanopia (no blue cones) | #139097 | 0.090 |
| Achromatopsia (no color) | #818181 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5583BC
#5583BC
oklch(60.2% 0.101 254.5)
- #A47734
#A47734
oklch(60.1% 0.101 74.5)
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 #5583BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.014
- Steel Blue #4682B4 ΔE 0.021
- Off Blue #5684AE ΔE 0.023
- Dusty Blue #5A86AD ΔE 0.027
- Faded Blue #658CBB ΔE 0.034
- Windows Blue #3778BF ΔE 0.046
- Water Blue #0E87CC ΔE 0.046
- Blue NCS #118AB2 ΔE 0.051
Use #5583BC 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.