#559CFA
Closest named color: Cornflower Blue (#6495ED). oklch(69% 0.157 256.2), rgb(85, 156, 250).
Aa
Black text reads best on this color (7.52:1).
About this color
#559CFA is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.157 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.025 away. Black text reads best on it, at 7.52:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.52:1 |
| White text | 2.79:1 |
Values
| HEX | #559CFA |
| RGB | rgb(85, 156, 250) |
| HSL | hsl(214, 94%, 66%) |
| OKLCH | oklch(69% 0.157 256.2) |
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 #559CFA | 2.79:1 | Fails | Lc -58.7 | Large or bold text, headings |
| Black text on #559CFA | 7.52:1 | AAA | Lc 50.6 | Large or bold text, headings |
| #559CFA text on white | 2.79:1 | Fails | Lc 53.5 | Large or bold text, headings |
| #559CFA text on black | 7.52:1 | AAA | Lc -48.4 | 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
#DEEBFD
oklch(93.6% 0.028 256.5)
-
Step 200
200
#C2DBFD
oklch(88.4% 0.054 256.1)
-
Step 300
300
#97C3FF
oklch(80.8% 0.098 256.3)
-
Step 400
400 (this color)
#559CFA
oklch(69% 0.157 256.2)
-
Step 500
500
#2086FF
oklch(63.1% 0.201 256.3)
-
Step 600
600
#006FDF
oklch(55.6% 0.191 256.1)
-
Step 700
700
#005DBD
oklch(49.1% 0.169 256.1)
-
Step 800
800
#004C9D
oklch(42.8% 0.147 256.2)
-
Step 900
900
#003F84
oklch(37.7% 0.129 256.1)
-
Step 950
950
#05254E
oklch(26.9% 0.084 256.6)
#559CFA 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) | #72A3FE | 0.036 |
| Deuteranopia (no green cones) | #5A94F8 | 0.020 |
| Tritanopia (no blue cones) | #00B2BF | 0.126 |
| Achromatopsia (no color) | #9B9B9B | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559CFA
#559CFA
oklch(69% 0.157 256.2)
- #CE8D00
#CE8D00
oklch(69.1% 0.145 76.1)
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 #559CFA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.025
- Chefchaouen Blue #4895EF ΔE 0.027
- Dark Sky Blue #448EE4 ΔE 0.050
- Dodger Blue #1E90FF ΔE 0.051
- Soft Blue #6488EA ΔE 0.053
- Periwinkle Blue #8F99FB ΔE 0.063
- Lavender Blue #8B88F8 ΔE 0.073
- Perrywinkle #8F8CE7 ΔE 0.073
Use #559CFA 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.