#559AFE
Closest named color: Cornflower Blue (#6495ED). oklch(68.8% 0.164 257.8), rgb(85, 154, 254).
Aa
Black text reads best on this color (7.43:1).
About this color
#559AFE is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.164 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.028 away. Black text reads best on it, at 7.43:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.164) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.43:1 |
| White text | 2.82:1 |
Values
| HEX | #559AFE |
| RGB | rgb(85, 154, 254) |
| HSL | hsl(216, 99%, 66%) |
| OKLCH | oklch(68.8% 0.164 257.8) |
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 #559AFE | 2.82:1 | Fails | Lc -59.2 | Large or bold text, headings |
| Black text on #559AFE | 7.43:1 | AAA | Lc 50.1 | Large or bold text, headings |
| #559AFE text on white | 2.82:1 | Fails | Lc 53.9 | Large or bold text, headings |
| #559AFE text on black | 7.43:1 | AAA | Lc -47.9 | 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
#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
#9AC3FF
oklch(81% 0.096 257.8)
-
Step 400
400 (this color)
#559AFE
oklch(68.8% 0.164 257.8)
-
Step 500
500
#2C85FF
oklch(63.1% 0.2 257.8)
-
Step 600
600
#006CE7
oklch(55.5% 0.204 257.8)
-
Step 700
700
#005BC4
oklch(49.2% 0.18 257.7)
-
Step 800
800
#004AA2
oklch(42.7% 0.156 257.7)
-
Step 900
900
#023D88
oklch(37.6% 0.137 258)
-
Step 950
950
#06254F
oklch(27% 0.085 257.4)
#559AFE 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) | #6CA2FF | 0.033 |
| Deuteranopia (no green cones) | #5393FC | 0.019 |
| Tritanopia (no blue cones) | #00B1C0 | 0.131 |
| Achromatopsia (no color) | #9A9A9A | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559AFE
#559AFE
oklch(68.8% 0.164 257.8)
- #CB8D00
#CB8D00
oklch(68.7% 0.144 77.5)
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 #559AFE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.028
- Chefchaouen Blue #4895EF ΔE 0.028
- Dodger Blue #1E90FF ΔE 0.047
- Soft Blue #6488EA ΔE 0.050
- Dark Sky Blue #448EE4 ΔE 0.051
- Periwinkle Blue #8F99FB ΔE 0.064
- Lavender Blue #8B88F8 ΔE 0.070
- Perrywinkle #8F8CE7 ΔE 0.074
Use #559AFE 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.