#559FDE
Closest named color: Cornflower Blue (#6495ED). oklch(68.2% 0.119 246.4), rgb(85, 159, 222).
Aa
Black text reads best on this color (7.40:1).
About this color
#559FDE is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.119 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.041 away. Black text reads best on it, at 7.40:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.40:1 |
| White text | 2.83:1 |
Values
| HEX | #559FDE |
| RGB | rgb(85, 159, 222) |
| HSL | hsl(208, 67%, 60%) |
| OKLCH | oklch(68.2% 0.119 246.4) |
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 #559FDE | 2.83:1 | Fails | Lc -59.5 | Large or bold text, headings |
| Black text on #559FDE | 7.40:1 | AAA | Lc 49.8 | Large or bold text, headings |
| #559FDE text on white | 2.83:1 | Fails | Lc 54.2 | Large or bold text, headings |
| #559FDE text on black | 7.40:1 | AAA | Lc -47.6 | 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
#DFECF8
oklch(93.7% 0.021 245.9)
-
Step 200
200
#C4DCF4
oklch(88.4% 0.042 248.3)
-
Step 300
300
#99C6EF
oklch(80.9% 0.075 246.4)
-
Step 400
400 (this color)
#559FDE
oklch(68.2% 0.119 246.4)
-
Step 500
500
#208FDF
oklch(63% 0.152 246.4)
-
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
#004472
oklch(37.6% 0.099 246.8)
-
Step 950
950
#062843
oklch(26.9% 0.063 247.1)
#559FDE 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) | #84A1E1 | 0.051 |
| Deuteranopia (no green cones) | #7193DD | 0.040 |
| Tritanopia (no blue cones) | #00AEB5 | 0.093 |
| Achromatopsia (no color) | #999999 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559FDE
#559FDE
oklch(68.2% 0.119 246.4)
- #CA893F
#CA893F
oklch(68.2% 0.12 66.7)
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 #559FDE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.041
- Chefchaouen Blue #4895EF ΔE 0.043
- Dark Sky Blue #448EE4 ΔE 0.054
- Faded Blue #658CBB ΔE 0.064
- Soft Blue #6488EA ΔE 0.068
- Greyblue #77A1B5 ΔE 0.070
- Dodger Blue #1E90FF ΔE 0.079
- Turquoise Blue #06B1C4 ΔE 0.079
Use #559FDE 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.