#559CC8
Closest named color: Faded Blue (#658CBB). oklch(66.4% 0.097 237.8), rgb(85, 156, 200).
Aa
Black text reads best on this color (6.97:1).
About this color
#559CC8 is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.097 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.044 away. Black text reads best on it, at 6.97:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.97:1 |
| White text | 3.01:1 |
Values
| HEX | #559CC8 |
| RGB | rgb(85, 156, 200) |
| HSL | hsl(203, 51%, 56%) |
| OKLCH | oklch(66.4% 0.097 237.8) |
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 #559CC8 | 3.01:1 | AA large text | Lc -62.0 | Content text, not long reading |
| Black text on #559CC8 | 6.97:1 | AA | Lc 47.4 | Large or bold text, headings |
| #559CC8 text on white | 3.01:1 | AA large text | Lc 56.6 | Large or bold text, headings |
| #559CC8 text on black | 6.97:1 | AA | Lc -45.1 | Large or bold text, headings |
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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CADCE9
oklch(88.5% 0.026 239.1)
-
Step 300
300
#A5C6DC
oklch(81% 0.047 237.4)
-
Step 400
400
#73A8CB
oklch(70.8% 0.076 238.2)
-
Step 500
500 (this color)
#559CC8
oklch(66.4% 0.097 237.8)
-
Step 600
600
#287BA9
oklch(55.5% 0.105 237.7)
-
Step 700
700
#1A6891
oklch(49.2% 0.097 237.3)
-
Step 800
800
#195576
oklch(42.8% 0.081 237.5)
-
Step 900
900
#1C465F
oklch(37.7% 0.063 237.9)
-
Step 950
950
#122938
oklch(27% 0.04 239.2)
#559CC8 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) | #889BCA | 0.057 |
| Deuteranopia (no green cones) | #788FC7 | 0.048 |
| Tritanopia (no blue cones) | #00A7AB | 0.073 |
| Achromatopsia (no color) | #959595 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559CC8
#559CC8
oklch(66.4% 0.097 237.8)
- #C08455
#C08455
oklch(66.4% 0.097 58.1)
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 #559CC8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.044
- Greyblue #77A1B5 ΔE 0.049
- Silver Lake Blue #778DA9 ΔE 0.059
- Cadet Blue #5F9EA0 ΔE 0.063
- Blue Grey #758DA3 ΔE 0.063
- Dusty Blue #5A86AD ΔE 0.065
- Cornflower Blue #6495ED ΔE 0.066
- Dark Sky Blue #448EE4 ΔE 0.066
Use #559CC8 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.