#559ED0
Closest named color: Faded Blue (#658CBB). oklch(67.3% 0.104 240.6), rgb(85, 158, 208).
Aa
Black text reads best on this color (7.18:1).
About this color
#559ED0 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.104 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.052 away. Black text reads best on it, at 7.18:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 7.18:1 |
| White text | 2.92:1 |
Values
| HEX | #559ED0 |
| RGB | rgb(85, 158, 208) |
| HSL | hsl(204, 57%, 57%) |
| OKLCH | oklch(67.3% 0.104 240.6) |
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 #559ED0 | 2.92:1 | Fails | Lc -60.7 | Content text, not long reading |
| Black text on #559ED0 | 7.18:1 | AAA | Lc 48.6 | Large or bold text, headings |
| #559ED0 text on white | 2.92:1 | Fails | Lc 55.4 | Large or bold text, headings |
| #559ED0 text on black | 7.18:1 | AAA | Lc -46.4 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C5DDEF
oklch(88.5% 0.036 240.3)
-
Step 300
300
#9BC7E7
oklch(80.9% 0.065 240.2)
-
Step 400
400 (this color)
#559ED0
oklch(67.3% 0.104 240.6)
-
Step 500
500
#2692D2
oklch(63.1% 0.134 240.8)
-
Step 600
600
#007BB7
oklch(55.7% 0.129 240.7)
-
Step 700
700
#00679A
oklch(49.1% 0.113 240.5)
-
Step 800
800
#00547F
oklch(42.6% 0.099 240.7)
-
Step 900
900
#01466B
oklch(37.7% 0.087 241)
-
Step 950
950
#07293F
oklch(26.9% 0.056 241.9)
#559ED0 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) | #889ED2 | 0.056 |
| Deuteranopia (no green cones) | #7791CF | 0.047 |
| Tritanopia (no blue cones) | #00AAAF | 0.079 |
| Achromatopsia (no color) | #979797 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559ED0
#559ED0
oklch(67.3% 0.104 240.6)
- #C58650
#C58650
oklch(67.3% 0.105 60.2)
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 #559ED0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.052
- Greyblue #77A1B5 ΔE 0.054
- Cornflower Blue #6495ED ΔE 0.057
- Chefchaouen Blue #4895EF ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.062
- Turquoise Blue #06B1C4 ΔE 0.068
- Silver Lake Blue #778DA9 ΔE 0.068
- Bluegrey #85A3B2 ΔE 0.070
Use #559ED0 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.