#559BD6
Closest named color: Cornflower Blue (#6495ED). oklch(66.9% 0.113 246), rgb(85, 155, 214).
Aa
Black text reads best on this color (7.04:1).
About this color
#559BD6 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.113 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.044 away. Black text reads best on it, at 7.04:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.04:1 |
| White text | 2.98:1 |
Values
| HEX | #559BD6 |
| RGB | rgb(85, 155, 214) |
| HSL | hsl(207, 61%, 59%) |
| OKLCH | oklch(66.9% 0.113 246) |
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 #559BD6 | 2.98:1 | Fails | Lc -61.6 | Content text, not long reading |
| Black text on #559BD6 | 7.04:1 | AAA | Lc 47.8 | Large or bold text, headings |
| #559BD6 text on white | 2.98:1 | Fails | Lc 56.2 | Large or bold text, headings |
| #559BD6 text on black | 7.04:1 | AAA | Lc -45.6 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#C9DCED
oklch(88.6% 0.031 245.1)
-
Step 300
300
#A4C5E3
oklch(80.9% 0.055 246)
-
Step 400
400
#71A6D5
oklch(70.6% 0.089 246.2)
-
Step 500
500 (this color)
#559BD6
oklch(66.9% 0.113 246)
-
Step 600
600
#2778B6
oklch(55.5% 0.123 246.1)
-
Step 700
700
#19659D
oklch(49.1% 0.114 246.1)
-
Step 800
800
#18537F
oklch(42.8% 0.094 245.5)
-
Step 900
900
#1B4566
oklch(37.8% 0.073 245.3)
-
Step 950
950
#11283C
oklch(26.9% 0.047 246.9)
#559BD6 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) | #819DD9 | 0.049 |
| Deuteranopia (no green cones) | #7090D5 | 0.038 |
| Tritanopia (no blue cones) | #00A9AF | 0.090 |
| Achromatopsia (no color) | #959595 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559BD6
#559BD6
oklch(66.9% 0.113 246)
- #C48642
#C48642
oklch(67% 0.113 66.1)
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 #559BD6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.044
- Chefchaouen Blue #4895EF ΔE 0.046
- Dark Sky Blue #448EE4 ΔE 0.049
- Faded Blue #658CBB ΔE 0.050
- Greyblue #77A1B5 ΔE 0.066
- Soft Blue #6488EA ΔE 0.066
- Silver Lake Blue #778DA9 ΔE 0.072
- Cool Blue #4984B8 ΔE 0.074
Use #559BD6 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.