#556FFC
Closest named color: Cornflower (#6A79F7). oklch(60.1% 0.211 270.8), rgb(85, 111, 252).
Aa
Black text reads best on this color (5.06:1).
About this color
#556FFC is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.211 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.039 away. Black text reads best on it, at 5.06:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.211) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.06:1 |
| White text | 4.14:1 |
Values
| HEX | #556FFC |
| RGB | rgb(85, 111, 252) |
| HSL | hsl(231, 97%, 66%) |
| OKLCH | oklch(60.1% 0.211 270.8) |
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 #556FFC | 4.14:1 | AA large text | Lc -73.6 | Content text, not long reading |
| Black text on #556FFC | 5.06:1 | AA | Lc 36.0 | Non-text elements, placeholder text |
| #556FFC text on white | 4.14:1 | AA large text | Lc 68.1 | Content text, not long reading |
| #556FFC text on black | 5.06:1 | AA | Lc -33.6 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#A9BEFF
oklch(80.9% 0.095 270.4)
-
Step 400
400
#7E99FF
oklch(70.7% 0.152 270.9)
-
Step 500
500 (this color)
#556FFC
oklch(60.1% 0.211 270.8)
-
Step 600
600
#475CF6
oklch(55.6% 0.229 270.8)
-
Step 700
700
#3A4AD7
oklch(49.1% 0.214 270.9)
-
Step 800
800
#2F3EAD
oklch(42.6% 0.176 270.8)
-
Step 900
900
#283789
oklch(37.7% 0.137 270.5)
-
Step 950
950
#172150
oklch(26.9% 0.087 270.5)
#556FFC 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) | #0084FF | 0.061 |
| Deuteranopia (no green cones) | #0075F9 | 0.050 |
| Tritanopia (no blue cones) | #0091AB | 0.172 |
| Achromatopsia (no color) | #7C7C7C | 0.211 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556FFC
#556FFC
oklch(60.1% 0.211 270.8)
- #9C7D00
#9C7D00
oklch(60.2% 0.123 91.3)
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 #556FFC, closest first.
No curated palette has a color within ΔE 0.04 of #556FFC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.039
- Clear Blue #247AFD ΔE 0.042
- Neon Blue #4361EE ΔE 0.046
- Royal Blue #4169E1 ΔE 0.050
- Medium Slate Blue #7B68EE ΔE 0.055
- Cerulean Blue #056EEE ΔE 0.058
- Bright Blue #0165FC ΔE 0.064
- Dark Periwinkle #665FD1 ΔE 0.074
Use #556FFC 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.