#556AB8
Closest named color: French Blue (#436BAD). oklch(54.5% 0.124 270.5), rgb(85, 106, 184).
Aa
White text reads best on this color (5.07:1).
About this color
#556AB8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.124 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.028 away. White text reads best on it, at 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.14:1 |
| White text | 5.07:1 |
Values
| HEX | #556AB8 |
| RGB | rgb(85, 106, 184) |
| HSL | hsl(227, 41%, 53%) |
| OKLCH | oklch(54.5% 0.124 270.5) |
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 #556AB8 | 5.07:1 | AA | Lc -80.3 | Fine for body text |
| Black text on #556AB8 | 4.14:1 | AA large text | Lc 29.2 | Dividers and decoration only |
| #556AB8 text on white | 5.07:1 | AA | Lc 74.9 | Content text, not long reading |
| #556AB8 text on black | 4.14:1 | AA large text | Lc -26.9 | 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
#E6EAF5
oklch(93.7% 0.015 270)
-
Step 200
200
#D1D9EE
oklch(88.6% 0.03 269.1)
-
Step 300
300
#B3BFE6
oklch(80.8% 0.057 271.7)
-
Step 400
400
#8B9ED9
oklch(70.7% 0.089 270.3)
-
Step 500
500
#6F85CF
oklch(63.1% 0.115 270.3)
-
Step 600
600 (this color)
#556AB8
oklch(54.5% 0.124 270.5)
-
Step 700
700
#485BA2
oklch(49.1% 0.116 270.4)
-
Step 800
800
#3B4B83
oklch(42.8% 0.095 270)
-
Step 900
900
#333F69
oklch(37.8% 0.074 270.5)
-
Step 950
950
#1E253E
oklch(27.1% 0.048 271.1)
#556AB8 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) | #4973BB | 0.026 |
| Deuteranopia (no green cones) | #3E6AB6 | 0.027 |
| Tritanopia (no blue cones) | #247B88 | 0.111 |
| Achromatopsia (no color) | #6E6E6E | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556AB8
#556AB8
oklch(54.5% 0.124 270.5)
- #896C00
#896C00
oklch(54.4% 0.111 90.1)
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 #556AB8, closest first.
No curated palette has a color within ΔE 0.04 of #556AB8.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.028
- Windows Blue #3778BF ΔE 0.044
- Mid Blue #276AB3 ΔE 0.046
- Flat Blue #3C73A8 ΔE 0.047
- Iris #6258C4 ΔE 0.053
- Dark Periwinkle #665FD1 ΔE 0.055
- Muted Blue #3B719F ΔE 0.056
- Slate Blue #6A5ACD ΔE 0.061
Use #556AB8 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.