#556CB3
Closest named color: French Blue (#436BAD). oklch(54.6% 0.114 268.9), rgb(85, 108, 179).
Aa
White text reads best on this color (5.02:1).
About this color
#556CB3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.114 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.024 away. White text reads best on it, at 5.02:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.18:1 |
| White text | 5.02:1 |
Values
| HEX | #556CB3 |
| RGB | rgb(85, 108, 179) |
| HSL | hsl(225, 38%, 52%) |
| OKLCH | oklch(54.6% 0.114 268.9) |
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 #556CB3 | 5.02:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #556CB3 | 4.18:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #556CB3 text on white | 5.02:1 | AA | Lc 74.6 | Content text, not long reading |
| #556CB3 text on black | 4.18:1 | AA large text | Lc -27.1 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E6EAF4
oklch(93.7% 0.014 268.5)
-
Step 200
200
#D1D9ED
oklch(88.5% 0.029 268.3)
-
Step 300
300
#B3C0E3
oklch(80.9% 0.052 269.2)
-
Step 400
400
#8B9FD5
oklch(70.7% 0.083 268.6)
-
Step 500
500
#6F86C9
oklch(63% 0.105 268.9)
-
Step 600
600 (this color)
#556CB3
oklch(54.6% 0.114 268.9)
-
Step 700
700
#485D9D
oklch(49.2% 0.106 268.6)
-
Step 800
800
#3B4C7F
oklch(42.7% 0.088 268.6)
-
Step 900
900
#323F66
oklch(37.5% 0.069 268.9)
-
Step 950
950
#1E253C
oklch(27% 0.044 270.3)
#556CB3 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) | #5073B6 | 0.019 |
| Deuteranopia (no green cones) | #456BB1 | 0.020 |
| Tritanopia (no blue cones) | #297B87 | 0.102 |
| Achromatopsia (no color) | #6F6F6F | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556CB3
#556CB3
oklch(54.6% 0.114 268.9)
- #8B6C00
#8B6C00
oklch(54.7% 0.112 88.7)
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 #556CB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.024
- Flat Blue #3C73A8 ΔE 0.039
- Windows Blue #3778BF ΔE 0.041
- Mid Blue #276AB3 ΔE 0.046
- Muted Blue #3B719F ΔE 0.048
- Dull Blue #49759C ΔE 0.051
- Nice Blue #107AB0 ΔE 0.061
- Dusky Blue #475F94 ΔE 0.061
Use #556CB3 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.