#556EC2
Closest named color: Windows Blue (#3778BF). oklch(55.9% 0.133 269.3), rgb(85, 110, 194).
Aa
White text reads best on this color (4.77:1).
About this color
#556EC2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.133 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.038 away. White text reads best on it, at 4.77:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.39:1 |
| White text | 4.77:1 |
Values
| HEX | #556EC2 |
| RGB | rgb(85, 110, 194) |
| HSL | hsl(226, 47%, 55%) |
| OKLCH | oklch(55.9% 0.133 269.3) |
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 #556EC2 | 4.77:1 | AA | Lc -78.4 | Fine for body text |
| Black text on #556EC2 | 4.39:1 | AA large text | Lc 31.1 | Non-text elements, placeholder text |
| #556EC2 text on white | 4.77:1 | AA | Lc 73.0 | Content text, not long reading |
| #556EC2 text on black | 4.39:1 | AA large text | Lc -28.7 | Dividers and decoration only |
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 600.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9F0
oklch(88.6% 0.033 268.7)
-
Step 300
300
#B1C0E8
oklch(81% 0.059 268.9)
-
Step 400
400
#889EDD
oklch(70.7% 0.096 269.1)
-
Step 500
500
#6C85D4
oklch(63.2% 0.123 269.4)
-
Step 600
600 (this color)
#556EC2
oklch(55.9% 0.133 269.3)
-
Step 700
700
#455BA7
oklch(49.2% 0.124 269.3)
-
Step 800
800
#384A87
oklch(42.6% 0.104 269.3)
-
Step 900
900
#303F6C
oklch(37.8% 0.08 268.5)
-
Step 950
950
#1C253F
oklch(27% 0.05 268.4)
#556EC2 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) | #4978C5 | 0.028 |
| Deuteranopia (no green cones) | #3C6EC0 | 0.027 |
| Tritanopia (no blue cones) | #11808E | 0.119 |
| Achromatopsia (no color) | #727272 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556EC2
#556EC2
oklch(55.9% 0.133 269.3)
- #8F7000
#8F7000
oklch(56% 0.114 89.4)
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 #556EC2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.038
- French Blue #436BAD ΔE 0.041
- Dark Periwinkle #665FD1 ΔE 0.050
- Flat Blue #3C73A8 ΔE 0.054
- Mid Blue #276AB3 ΔE 0.054
- Royal Blue #4169E1 ΔE 0.055
- Iris #6258C4 ΔE 0.057
- Slate Blue #6A5ACD ΔE 0.059
Use #556EC2 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.