#556EA3
Closest named color: Flat Blue (#3C73A8). oklch(54.2% 0.089 264.4), rgb(85, 110, 163).
Aa
White text reads best on this color (5.06:1).
About this color
#556EA3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.089 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.028 away. White text reads best on it, at 5.06:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.14:1 |
| White text | 5.06:1 |
Values
| HEX | #556EA3 |
| RGB | rgb(85, 110, 163) |
| HSL | hsl(221, 31%, 49%) |
| OKLCH | oklch(54.2% 0.089 264.4) |
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 #556EA3 | 5.06:1 | AA | Lc -80.3 | Fine for body text |
| Black text on #556EA3 | 4.14:1 | AA large text | Lc 29.2 | Dividers and decoration only |
| #556EA3 text on white | 5.06:1 | AA | Lc 74.9 | Content text, not long reading |
| #556EA3 text on black | 4.14:1 | 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
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D2D9E8
oklch(88.4% 0.022 265.8)
-
Step 300
300
#B4C1DB
oklch(80.9% 0.039 264.3)
-
Step 400
400
#8DA1C9
oklch(70.8% 0.063 264)
-
Step 500
500
#7189BB
oklch(63.1% 0.081 264.4)
-
Step 600
600 (this color)
#556EA3
oklch(54.2% 0.089 264.4)
-
Step 700
700
#496090
oklch(49.2% 0.082 264.1)
-
Step 800
800
#3C4E75
oklch(42.7% 0.069 264.7)
-
Step 900
900
#33415E
oklch(37.6% 0.053 264.2)
-
Step 950
950
#1E2637
oklch(26.9% 0.034 264.8)
#556EA3 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) | #5A72A5 | 0.014 |
| Deuteranopia (no green cones) | #526BA2 | 0.010 |
| Tritanopia (no blue cones) | #367981 | 0.079 |
| Achromatopsia (no color) | #6E6E6E | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556EA3
#556EA3
oklch(54.2% 0.089 264.4)
- #876A2B
#876A2B
oklch(54% 0.088 84)
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 #556EA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.028
- Dull Blue #49759C ΔE 0.028
- French Blue #436BAD ΔE 0.029
- Muted Blue #3B719F ΔE 0.030
- Metallic Blue #4F738E ΔE 0.041
- Stormy Blue #507B9C ΔE 0.042
- Cerulean #457B9D ΔE 0.043
- Dusky Blue #475F94 ΔE 0.051
Use #556EA3 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.