#559ECD
Closest named color: Faded Blue (#658CBB). oklch(67.1% 0.101 239), rgb(85, 158, 205).
Aa
Black text reads best on this color (7.15:1).
About this color
#559ECD is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.101 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.050 away. Black text reads best on it, at 7.15:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 7.15:1 |
| White text | 2.93:1 |
Values
| HEX | #559ECD |
| RGB | rgb(85, 158, 205) |
| HSL | hsl(204, 55%, 57%) |
| OKLCH | oklch(67.1% 0.101 239) |
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 #559ECD | 2.93:1 | Fails | Lc -60.9 | Content text, not long reading |
| Black text on #559ECD | 7.15:1 | AAA | Lc 48.5 | Large or bold text, headings |
| #559ECD text on white | 2.93:1 | Fails | Lc 55.6 | Large or bold text, headings |
| #559ECD text on black | 7.15:1 | AAA | Lc -46.2 | 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 400.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#DFECF5
oklch(93.6% 0.018 237.8)
-
Step 200
200
#C5DDEE
oklch(88.5% 0.035 238.7)
-
Step 300
300
#9BC7E5
oklch(80.9% 0.063 238.4)
-
Step 400
400 (this color)
#559ECD
oklch(67.1% 0.101 239)
-
Step 500
500
#2793CF
oklch(63.2% 0.129 239)
-
Step 600
600
#007BB4
oklch(55.5% 0.126 239.3)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#00557D
oklch(42.7% 0.096 238.5)
-
Step 900
900
#014769
oklch(37.8% 0.084 238.4)
-
Step 950
950
#072A3D
oklch(27.1% 0.052 237.4)
#559ECD 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) | #899ECF | 0.057 |
| Deuteranopia (no green cones) | #7891CC | 0.048 |
| Tritanopia (no blue cones) | #00AAAE | 0.077 |
| Achromatopsia (no color) | #979797 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559ECD
#559ECD
oklch(67.1% 0.101 239)
- #C48653
#C48653
oklch(67.2% 0.102 59.3)
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 #559ECD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.050
- Greyblue #77A1B5 ΔE 0.051
- Cornflower Blue #6495ED ΔE 0.061
- Chefchaouen Blue #4895EF ΔE 0.063
- Dark Sky Blue #448EE4 ΔE 0.065
- Silver Lake Blue #778DA9 ΔE 0.065
- Turquoise Blue #06B1C4 ΔE 0.065
- Bluegrey #85A3B2 ΔE 0.068
Use #559ECD 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.