#559BD7
Closest named color: Cornflower Blue (#6495ED). oklch(66.9% 0.114 246.4), rgb(85, 155, 215).
Aa
Black text reads best on this color (7.05:1).
About this color
#559BD7 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.114 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.043 away. Black text reads best on it, at 7.05:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.05:1 |
| White text | 2.97:1 |
Values
| HEX | #559BD7 |
| RGB | rgb(85, 155, 215) |
| HSL | hsl(208, 62%, 59%) |
| OKLCH | oklch(66.9% 0.114 246.4) |
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 #559BD7 | 2.97:1 | Fails | Lc -61.5 | Content text, not long reading |
| Black text on #559BD7 | 7.05:1 | AAA | Lc 47.9 | Large or bold text, headings |
| #559BD7 text on white | 2.97:1 | Fails | Lc 56.2 | Large or bold text, headings |
| #559BD7 text on black | 7.05:1 | 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 400.
-
Step 50
50
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C5DCF2
oklch(88.4% 0.039 247.1)
-
Step 300
300
#9BC6ED
oklch(80.9% 0.072 246.2)
-
Step 400
400 (this color)
#559BD7
oklch(66.9% 0.114 246.4)
-
Step 500
500
#2A8FDC
oklch(63.1% 0.146 246.6)
-
Step 600
600
#0078C2
oklch(55.6% 0.145 246.5)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800
#005287
oklch(42.6% 0.111 246.5)
-
Step 900
900
#044471
oklch(37.6% 0.096 247.1)
-
Step 950
950
#082842
oklch(26.9% 0.061 247.3)
#559BD7 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) | #819DDA | 0.049 |
| Deuteranopia (no green cones) | #7090D6 | 0.038 |
| Tritanopia (no blue cones) | #00A9B0 | 0.090 |
| Achromatopsia (no color) | #969696 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559BD7
#559BD7
oklch(66.9% 0.114 246.4)
- #C48641
#C48641
oklch(67% 0.114 66.5)
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 #559BD7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.043
- Chefchaouen Blue #4895EF ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.048
- Faded Blue #658CBB ΔE 0.051
- Soft Blue #6488EA ΔE 0.065
- Greyblue #77A1B5 ΔE 0.067
- Silver Lake Blue #778DA9 ΔE 0.074
- Cool Blue #4984B8 ΔE 0.074
Use #559BD7 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.