#556DA8
Closest named color: French Blue (#436BAD). oklch(54.2% 0.097 266.4), rgb(85, 109, 168).
Aa
White text reads best on this color (5.07:1).
About this color
#556DA8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.097 and its hue 266°. 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 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.13:1 |
| White text | 5.07:1 |
Values
| HEX | #556DA8 |
| RGB | rgb(85, 109, 168) |
| HSL | hsl(223, 33%, 50%) |
| OKLCH | oklch(54.2% 0.097 266.4) |
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 #556DA8 | 5.07:1 | AA | Lc -80.3 | Fine for body text |
| Black text on #556DA8 | 4.13:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #556DA8 text on white | 5.07:1 | AA | Lc 74.9 | Content text, not long reading |
| #556DA8 text on black | 4.13:1 | AA large text | Lc -26.8 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
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
#B4C1DE
oklch(81% 0.043 266.3)
-
Step 400
400
#8CA0CD
oklch(70.7% 0.07 266)
-
Step 500
500
#7088C0
oklch(63.1% 0.089 266.1)
-
Step 600
600 (this color)
#556DA8
oklch(54.2% 0.097 266.4)
-
Step 700
700
#495F94
oklch(49.2% 0.089 266.1)
-
Step 800
800
#3C4D78
oklch(42.6% 0.075 266.8)
-
Step 900
900
#334161
oklch(37.8% 0.058 265.6)
-
Step 950
950
#1E2639
oklch(27% 0.037 266.4)
#556DA8 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) | #5772AA | 0.014 |
| Deuteranopia (no green cones) | #4E6BA7 | 0.011 |
| Tritanopia (no blue cones) | #327A83 | 0.087 |
| Achromatopsia (no color) | #6E6E6E | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556DA8
#556DA8
oklch(54.2% 0.097 266.4)
- #886B20
#886B20
oklch(54.3% 0.097 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 #556DA8, 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 0.030
- Muted Blue #3B719F ΔE 0.035
- Dull Blue #49759C ΔE 0.036
- Windows Blue #3778BF ΔE 0.047
- Stormy Blue #507B9C ΔE 0.049
- Mid Blue #276AB3 ΔE 0.050
- Cerulean #457B9D ΔE 0.050
Use #556DA8 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.