#556AD3
Closest named color: Royal Blue (#4169E1). oklch(56.2% 0.162 271.7), rgb(85, 106, 211).
Aa
White text reads best on this color (4.78:1).
About this color
#556AD3 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.162 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.031 away. White text reads best on it, at 4.78:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.38:1 |
| White text | 4.78:1 |
Values
| HEX | #556AD3 |
| RGB | rgb(85, 106, 211) |
| HSL | hsl(230, 59%, 58%) |
| OKLCH | oklch(56.2% 0.162 271.7) |
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 #556AD3 | 4.78:1 | AA | Lc -78.4 | Fine for body text |
| Black text on #556AD3 | 4.38:1 | AA large text | Lc 31.2 | Non-text elements, placeholder text |
| #556AD3 text on white | 4.78:1 | AA | Lc 72.9 | Content text, not long reading |
| #556AD3 text on black | 4.38:1 | AA large text | Lc -28.8 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#CFD8F5
oklch(88.4% 0.041 271.9)
-
Step 300
300
#B0BFF1
oklch(81% 0.073 271.7)
-
Step 400
400
#879CEA
oklch(70.8% 0.117 271.7)
-
Step 500
500
#6A81E3
oklch(63.1% 0.149 271.6)
-
Step 600
600 (this color)
#556AD3
oklch(56.2% 0.162 271.7)
-
Step 700
700
#4456B5
oklch(49.1% 0.151 271.7)
-
Step 800
800
#384792
oklch(42.7% 0.124 271.7)
-
Step 900
900
#303C75
oklch(37.7% 0.098 272)
-
Step 950
950
#1C2444
oklch(27.1% 0.06 271.3)
#556AD3 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) | #3278D7 | 0.044 |
| Deuteranopia (no green cones) | #186DD1 | 0.050 |
| Tritanopia (no blue cones) | #008294 | 0.142 |
| Achromatopsia (no color) | #727272 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556AD3
#556AD3
oklch(56.2% 0.162 271.7)
- #8E7200
#8E7200
oklch(56.3% 0.115 91.6)
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 #556AD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.031
- Dark Periwinkle #665FD1 ΔE 0.033
- Slate Blue #6A5ACD ΔE 0.045
- Light Indigo #6D5ACF ΔE 0.047
- Iris #6258C4 ΔE 0.048
- Warm Blue #4B57DB ΔE 0.052
- Neon Blue #4361EE ΔE 0.053
- Windows Blue #3778BF ΔE 0.058
Use #556AD3 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.