#559CD5
Closest named color: Cornflower Blue (#6495ED). oklch(67% 0.111 244.8), rgb(85, 156, 213).
Aa
Black text reads best on this color (7.10:1).
About this color
#559CD5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.111 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.047 away. Black text reads best on it, at 7.10:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.10:1 |
| White text | 2.95:1 |
Values
| HEX | #559CD5 |
| RGB | rgb(85, 156, 213) |
| HSL | hsl(207, 60%, 58%) |
| OKLCH | oklch(67% 0.111 244.8) |
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 #559CD5 | 2.95:1 | Fails | Lc -61.2 | Content text, not long reading |
| Black text on #559CD5 | 7.10:1 | AAA | Lc 48.1 | Large or bold text, headings |
| #559CD5 text on white | 2.95:1 | Fails | Lc 55.9 | Large or bold text, headings |
| #559CD5 text on black | 7.10:1 | AAA | Lc -45.9 | 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
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C5DDF1
oklch(88.6% 0.038 243.3)
-
Step 300
300
#9BC6EB
oklch(80.9% 0.07 244.8)
-
Step 400
400 (this color)
#559CD5
oklch(67% 0.111 244.8)
-
Step 500
500
#2990D9
oklch(63.1% 0.142 245)
-
Step 600
600
#0079BE
oklch(55.6% 0.139 244.6)
-
Step 700
700
#0065A1
oklch(49% 0.124 245.1)
-
Step 800
800
#005385
oklch(42.7% 0.107 244.8)
-
Step 900
900
#03456F
oklch(37.7% 0.093 244.9)
-
Step 950
950
#072941
oklch(27.1% 0.059 244.2)
#559CD5 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) | #839DD8 | 0.050 |
| Deuteranopia (no green cones) | #7290D4 | 0.041 |
| Tritanopia (no blue cones) | #00AAB0 | 0.087 |
| Achromatopsia (no color) | #969696 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559CD5
#559CD5
oklch(67% 0.111 244.8)
- #C48646
#C48646
oklch(67% 0.111 64.7)
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 #559CD5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.047
- Chefchaouen Blue #4895EF ΔE 0.049
- Faded Blue #658CBB ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.052
- Greyblue #77A1B5 ΔE 0.063
- Soft Blue #6488EA ΔE 0.069
- Silver Lake Blue #778DA9 ΔE 0.072
- Dusty Blue #5A86AD ΔE 0.075
Use #559CD5 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.