#556BAB
Closest named color: French Blue (#436BAD). oklch(53.9% 0.104 268.4), rgb(85, 107, 171).
Aa
White text reads best on this color (5.15:1).
About this color
#556BAB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.104 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.021 away. White text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.07:1 |
| White text | 5.15:1 |
Values
| HEX | #556BAB |
| RGB | rgb(85, 107, 171) |
| HSL | hsl(225, 34%, 50%) |
| OKLCH | oklch(53.9% 0.104 268.4) |
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 #556BAB | 5.15:1 | AA | Lc -80.8 | Fine for body text |
| Black text on #556BAB | 4.07:1 | AA large text | Lc 28.7 | Dividers and decoration only |
| #556BAB text on white | 5.15:1 | AA | Lc 75.4 | Fine for body text |
| #556BAB text on black | 4.07:1 | AA large text | Lc -26.3 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D2D9EB
oklch(88.5% 0.026 268.8)
-
Step 300
300
#B4C0E0
oklch(80.9% 0.047 269.1)
-
Step 400
400
#8D9FD0
oklch(70.7% 0.075 268.8)
-
Step 500
500
#7187C4
oklch(63.1% 0.096 268.4)
-
Step 600
600 (this color)
#556BAB
oklch(53.9% 0.104 268.4)
-
Step 700
700
#4A5D98
oklch(49.1% 0.098 269.1)
-
Step 800
800
#3C4D7B
oklch(42.8% 0.08 267.6)
-
Step 900
900
#344063
oklch(37.8% 0.062 268.9)
-
Step 950
950
#1E263A
oklch(27.1% 0.039 267.1)
#556BAB 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) | #5271AE | 0.016 |
| Deuteranopia (no green cones) | #496AAA | 0.015 |
| Tritanopia (no blue cones) | #307983 | 0.094 |
| Achromatopsia (no color) | #6D6D6D | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556BAB
#556BAB
oklch(53.9% 0.104 268.4)
- #876A13
#876A13
oklch(53.8% 0.104 88.3)
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 #556BAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.021
- Flat Blue #3C73A8 ΔE 0.034
- Muted Blue #3B719F ΔE 0.040
- Dull Blue #49759C ΔE 0.043
- Mid Blue #276AB3 ΔE 0.047
- Windows Blue #3778BF ΔE 0.048
- Dusky Blue #475F94 ΔE 0.051
- Stormy Blue #507B9C ΔE 0.057
Use #556BAB 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.