#559BE7
Closest named color: Cornflower Blue (#6495ED). oklch(67.7% 0.134 252.1), rgb(85, 155, 231).
Aa
Black text reads best on this color (7.22:1).
About this color
#559BE7 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.134 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.024 away. Black text reads best on it, at 7.22:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.22:1 |
| White text | 2.90:1 |
Values
| HEX | #559BE7 |
| RGB | rgb(85, 155, 231) |
| HSL | hsl(211, 75%, 62%) |
| OKLCH | oklch(67.7% 0.134 252.1) |
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 #559BE7 | 2.90:1 | Fails | Lc -60.5 | Content text, not long reading |
| Black text on #559BE7 | 7.22:1 | AAA | Lc 48.9 | Large or bold text, headings |
| #559BE7 text on white | 2.90:1 | Fails | Lc 55.2 | Large or bold text, headings |
| #559BE7 text on black | 7.22:1 | AAA | Lc -46.7 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFA
oklch(93.6% 0.024 254)
-
Step 200
200
#C4DCF8
oklch(88.6% 0.047 252.4)
-
Step 300
300
#9AC5F6
oklch(81% 0.083 252.1)
-
Step 400
400 (this color)
#559BE7
oklch(67.7% 0.134 252.1)
-
Step 500
500
#268BEC
oklch(63% 0.171 252.1)
-
Step 600
600
#0074D1
oklch(55.7% 0.167 252.1)
-
Step 700
700
#0061B0
oklch(49% 0.147 252)
-
Step 800
800
#004F92
oklch(42.6% 0.129 252.3)
-
Step 900
900
#02427A
oklch(37.7% 0.111 252)
-
Step 950
950
#072747
oklch(26.9% 0.07 252)
#559BE7 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) | #7A9FEA | 0.041 |
| Deuteranopia (no green cones) | #6691E5 | 0.029 |
| Tritanopia (no blue cones) | #00ADB6 | 0.108 |
| Achromatopsia (no color) | #979797 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #559BE7
#559BE7
oklch(67.7% 0.134 252.1)
- #C98824
#C98824
oklch(67.7% 0.133 72.2)
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 #559BE7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.024
- Chefchaouen Blue #4895EF ΔE 0.025
- Dark Sky Blue #448EE4 ΔE 0.040
- Soft Blue #6488EA ΔE 0.052
- Dodger Blue #1E90FF ΔE 0.062
- Faded Blue #658CBB ΔE 0.069
- Perrywinkle #8F8CE7 ΔE 0.073
- Periwinkle Blue #8F99FB ΔE 0.073
Use #559BE7 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.