#556DAA
Closest named color: French Blue (#436BAD). oklch(54.3% 0.1 266.8), rgb(85, 109, 170).
Aa
White text reads best on this color (5.05:1).
About this color
#556DAA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.100 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.023 away. White text reads best on it, at 5.05:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.15:1 |
| White text | 5.05:1 |
Values
| HEX | #556DAA |
| RGB | rgb(85, 109, 170) |
| HSL | hsl(223, 33%, 50%) |
| OKLCH | oklch(54.3% 0.1 266.8) |
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 #556DAA | 5.05:1 | AA | Lc -80.2 | Fine for body text |
| Black text on #556DAA | 4.15:1 | AA large text | Lc 29.3 | Dividers and decoration only |
| #556DAA text on white | 5.05:1 | AA | Lc 74.8 | Content text, not long reading |
| #556DAA text on black | 4.15:1 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D2D9EA
oklch(88.5% 0.025 267.9)
-
Step 300
300
#B3C0DF
oklch(80.8% 0.046 267.4)
-
Step 400
400
#8CA0CE
oklch(70.7% 0.071 266.3)
-
Step 500
500
#7088C2
oklch(63.2% 0.092 266.6)
-
Step 600
600 (this color)
#556DAA
oklch(54.3% 0.1 266.8)
-
Step 700
700
#495E96
oklch(49.1% 0.094 267.3)
-
Step 800
800
#3C4D79
oklch(42.7% 0.077 267.1)
-
Step 900
900
#334062
oklch(37.6% 0.061 267.5)
-
Step 950
950
#1E2639
oklch(27% 0.037 266.4)
#556DAA 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) | #5673AC | 0.017 |
| Deuteranopia (no green cones) | #4D6BA9 | 0.012 |
| Tritanopia (no blue cones) | #317A83 | 0.090 |
| Achromatopsia (no color) | #6F6F6F | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556DAA
#556DAA
oklch(54.3% 0.1 266.8)
- #896B1C
#896B1C
oklch(54.3% 0.1 86.7)
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 #556DAA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.023
- Flat Blue #3C73A8 ΔE 0.031
- Muted Blue #3B719F ΔE 0.037
- Dull Blue #49759C ΔE 0.038
- Windows Blue #3778BF ΔE 0.045
- Mid Blue #276AB3 ΔE 0.049
- Stormy Blue #507B9C ΔE 0.051
- Cerulean #457B9D ΔE 0.052
Use #556DAA 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.