#559CCA
Closest named color: Faded Blue (#658CBB). oklch(66.5% 0.099 239), rgb(85, 156, 202).
Aa
Black text reads best on this color (6.99:1).
About this color
#559CCA is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.099 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.045 away. Black text reads best on it, at 6.99:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.99:1 |
| White text | 3.00:1 |
Values
| HEX | #559CCA |
| RGB | rgb(85, 156, 202) |
| HSL | hsl(204, 52%, 56%) |
| OKLCH | oklch(66.5% 0.099 239) |
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 #559CCA | 3.00:1 | AA large text | Lc -61.9 | Content text, not long reading |
| Black text on #559CCA | 6.99:1 | AA | Lc 47.5 | Large or bold text, headings |
| #559CCA text on white | 3.00:1 | AA large text | Lc 56.5 | Large or bold text, headings |
| #559CCA text on black | 6.99:1 | AA | Lc -45.2 | 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
#A5C6DD
oklch(81% 0.048 238.6)
-
Step 400
400
#72A8CC
oklch(70.7% 0.078 238.5)
-
Step 500
500 (this color)
#559CCA
oklch(66.5% 0.099 239)
-
Step 600
600
#287BAB
oklch(55.6% 0.107 238.9)
-
Step 700
700
#196793
oklch(49% 0.101 239.3)
-
Step 800
800
#195477
oklch(42.6% 0.083 239.5)
-
Step 900
900
#1C4660
oklch(37.7% 0.064 238.9)
-
Step 950
950
#122938
oklch(27% 0.04 239.2)
#559CCA 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) | #879CCC | 0.055 |
| Deuteranopia (no green cones) | #7790C9 | 0.045 |
| Tritanopia (no blue cones) | #00A8AB | 0.077 |
| Achromatopsia (no color) | #959595 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559CCA
#559CCA
oklch(66.5% 0.099 239)
- #C18453
#C18453
oklch(66.5% 0.099 58.7)
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 #559CCA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.045
- Greyblue #77A1B5 ΔE 0.051
- Silver Lake Blue #778DA9 ΔE 0.061
- Cornflower Blue #6495ED ΔE 0.063
- Dark Sky Blue #448EE4 ΔE 0.064
- Chefchaouen Blue #4895EF ΔE 0.064
- Blue Grey #758DA3 ΔE 0.065
- Cadet Blue #5F9EA0 ΔE 0.066
Use #559CCA 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.