#559CFE
Closest named color: Cornflower Blue (#6495ED). oklch(69.2% 0.162 257), rgb(85, 156, 254).
Aa
Black text reads best on this color (7.57:1).
About this color
#559CFE is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.162 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.029 away. Black text reads best on it, at 7.57:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.57:1 |
| White text | 2.77:1 |
Values
| HEX | #559CFE |
| RGB | rgb(85, 156, 254) |
| HSL | hsl(215, 99%, 66%) |
| OKLCH | oklch(69.2% 0.162 257) |
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 #559CFE | 2.77:1 | Fails | Lc -58.4 | Large or bold text, headings |
| Black text on #559CFE | 7.57:1 | AAA | Lc 50.8 | Large or bold text, headings |
| #559CFE text on white | 2.77:1 | Fails | Lc 53.2 | Large or bold text, headings |
| #559CFE text on black | 7.57:1 | AAA | Lc -48.7 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFE
oklch(93.6% 0.029 257.8)
-
Step 200
200
#C2DBFF
oklch(88.5% 0.057 257.5)
-
Step 300
300
#98C3FF
oklch(80.9% 0.097 256.8)
-
Step 400
400 (this color)
#559CFE
oklch(69.2% 0.162 257)
-
Step 500
500
#2686FF
oklch(63.2% 0.2 256.9)
-
Step 600
600
#006EE3
oklch(55.7% 0.197 256.9)
-
Step 700
700
#005CC0
oklch(49.1% 0.174 256.9)
-
Step 800
800
#004B9F
oklch(42.7% 0.151 256.9)
-
Step 900
900
#003E86
oklch(37.6% 0.133 257)
-
Step 950
950
#05254F
oklch(27% 0.086 257)
#559CFE 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) | #70A4FF | 0.036 |
| Deuteranopia (no green cones) | #5694FC | 0.021 |
| Tritanopia (no blue cones) | #00B3C1 | 0.130 |
| Achromatopsia (no color) | #9B9B9B | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559CFE
#559CFE
oklch(69.2% 0.162 257)
- #CE8E00
#CE8E00
oklch(69.3% 0.145 76.8)
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 #559CFE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.029
- Chefchaouen Blue #4895EF ΔE 0.031
- Dodger Blue #1E90FF ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.054
- Soft Blue #6488EA ΔE 0.054
- Periwinkle Blue #8F99FB ΔE 0.063
- Lavender Blue #8B88F8 ΔE 0.072
- Perrywinkle #8F8CE7 ΔE 0.075
Use #559CFE 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.