#559CFF
Closest named color: Cornflower Blue (#6495ED). oklch(69.3% 0.163 257.1), rgb(85, 156, 255).
Aa
Black text reads best on this color (7.58:1).
About this color
#559CFF is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.163 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.030 away. Black text reads best on it, at 7.58:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.58:1 |
| White text | 2.76:1 |
Values
| HEX | #559CFF |
| RGB | rgb(85, 156, 255) |
| HSL | hsl(215, 100%, 67%) |
| OKLCH | oklch(69.3% 0.163 257.1) |
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 #559CFF | 2.76:1 | Fails | Lc -58.4 | Large or bold text, headings |
| Black text on #559CFF | 7.58:1 | AAA | Lc 50.9 | Large or bold text, headings |
| #559CFF text on white | 2.76:1 | Fails | Lc 53.1 | Large or bold text, headings |
| #559CFF text on black | 7.58:1 | 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
#99C3FF
oklch(80.9% 0.097 257.3)
-
Step 400
400 (this color)
#559CFF
oklch(69.3% 0.163 257.1)
-
Step 500
500
#2785FF
oklch(63% 0.201 257.2)
-
Step 600
600
#006DE4
oklch(55.5% 0.199 257.3)
-
Step 700
700
#005CC1
oklch(49.2% 0.175 257.1)
-
Step 800
800
#004BA0
oklch(42.8% 0.152 257.1)
-
Step 900
900
#003E87
oklch(37.7% 0.135 257.2)
-
Step 950
950
#05254F
oklch(27% 0.086 257)
#559CFF 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) | #6FA4FF | 0.035 |
| Deuteranopia (no green cones) | #5594FD | 0.021 |
| Tritanopia (no blue cones) | #00B3C1 | 0.131 |
| Achromatopsia (no color) | #9B9B9B | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559CFF
#559CFF
oklch(69.3% 0.163 257.1)
- #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 #559CFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.030
- Chefchaouen Blue #4895EF ΔE 0.032
- Dodger Blue #1E90FF ΔE 0.050
- Dark Sky Blue #448EE4 ΔE 0.055
- Soft Blue #6488EA ΔE 0.055
- Periwinkle Blue #8F99FB ΔE 0.063
- Lavender Blue #8B88F8 ΔE 0.072
- Perrywinkle #8F8CE7 ΔE 0.075
Use #559CFF 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.