#559CF6
Closest named color: Cornflower Blue (#6495ED). oklch(68.8% 0.151 255.4), rgb(85, 156, 246).
Aa
Black text reads best on this color (7.47:1).
About this color
#559CF6 is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.151 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.022 away. Black text reads best on it, at 7.47:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.47:1 |
| White text | 2.81:1 |
Values
| HEX | #559CF6 |
| RGB | rgb(85, 156, 246) |
| HSL | hsl(214, 90%, 65%) |
| OKLCH | oklch(68.8% 0.151 255.4) |
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 #559CF6 | 2.81:1 | Fails | Lc -59.0 | Large or bold text, headings |
| Black text on #559CF6 | 7.47:1 | AAA | Lc 50.3 | Large or bold text, headings |
| #559CF6 text on white | 2.81:1 | Fails | Lc 53.8 | Large or bold text, headings |
| #559CF6 text on black | 7.47:1 | AAA | Lc -48.1 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DEEBFC
oklch(93.5% 0.027 255.1)
-
Step 200
200
#C3DBFC
oklch(88.4% 0.052 256.4)
-
Step 300
300
#98C4FD
oklch(81% 0.094 255.2)
-
Step 400
400 (this color)
#559CF6
oklch(68.8% 0.151 255.4)
-
Step 500
500
#2187FB
oklch(63.1% 0.195 255.5)
-
Step 600
600
#0070DC
oklch(55.6% 0.186 255.4)
-
Step 700
700
#005EBA
oklch(49.1% 0.163 255.3)
-
Step 800
800
#004D9A
oklch(42.7% 0.142 255.2)
-
Step 900
900
#004082
oklch(37.8% 0.125 255.2)
-
Step 950
950
#06264C
oklch(27% 0.079 255.4)
#559CF6 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) | #74A2FA | 0.037 |
| Deuteranopia (no green cones) | #5D93F4 | 0.023 |
| Tritanopia (no blue cones) | #00B1BD | 0.122 |
| Achromatopsia (no color) | #9A9A9A | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559CF6
#559CF6
oklch(68.8% 0.151 255.4)
- #CE8B00
#CE8B00
oklch(68.7% 0.145 74.9)
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 #559CF6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.022
- Chefchaouen Blue #4895EF ΔE 0.024
- Dark Sky Blue #448EE4 ΔE 0.047
- Soft Blue #6488EA ΔE 0.052
- Dodger Blue #1E90FF ΔE 0.053
- Periwinkle Blue #8F99FB ΔE 0.065
- Perrywinkle #8F8CE7 ΔE 0.072
- Lavender Blue #8B88F8 ΔE 0.074
Use #559CF6 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.