#559DFF
Closest named color: Cornflower Blue (#6495ED). oklch(69.5% 0.162 256.7), rgb(85, 157, 255).
Aa
Black text reads best on this color (7.65:1).
About this color
#559DFF 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 0.031 away. Black text reads best on it, at 7.65:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.65:1 |
| White text | 2.74:1 |
Values
| HEX | #559DFF |
| RGB | rgb(85, 157, 255) |
| HSL | hsl(215, 100%, 67%) |
| OKLCH | oklch(69.5% 0.162 256.7) |
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 #559DFF | 2.74:1 | Fails | Lc -58.0 | Large or bold text, headings |
| Black text on #559DFF | 7.65:1 | AAA | Lc 51.3 | Large or bold text, headings |
| #559DFF text on white | 2.74:1 | Fails | Lc 52.7 | Large or bold text, headings |
| #559DFF text on black | 7.65:1 | AAA | Lc -49.1 | 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)
#559DFF
oklch(69.5% 0.162 256.7)
-
Step 500
500
#2486FF
oklch(63.2% 0.2 256.7)
-
Step 600
600
#006EE2
oklch(55.6% 0.196 256.8)
-
Step 700
700
#005CBF
oklch(49% 0.172 256.8)
-
Step 800
800
#004B9E
oklch(42.6% 0.15 256.7)
-
Step 900
900
#003E86
oklch(37.6% 0.133 257)
-
Step 950
950
#05254F
oklch(27% 0.086 257)
#559DFF 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) | #71A5FF | 0.037 |
| Deuteranopia (no green cones) | #5795FD | 0.020 |
| Tritanopia (no blue cones) | #00B4C2 | 0.129 |
| Achromatopsia (no color) | #9C9C9C | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559DFF
#559DFF
oklch(69.5% 0.162 256.7)
- #CF8F00
#CF8F00
oklch(69.6% 0.146 77)
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 #559DFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.031
- Chefchaouen Blue #4895EF ΔE 0.033
- Dodger Blue #1E90FF ΔE 0.052
- Dark Sky Blue #448EE4 ΔE 0.056
- Soft Blue #6488EA ΔE 0.057
- Periwinkle Blue #8F99FB ΔE 0.063
- Lavender Blue #8B88F8 ΔE 0.074
- Perrywinkle #8F8CE7 ΔE 0.076
Use #559DFF 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.