#556EAF
Closest named color: French Blue (#436BAD). oklch(54.8% 0.106 267), rgb(85, 110, 175).
Aa
White text reads best on this color (4.95:1).
About this color
#556EAF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.106 and its hue 267°. 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 4.95:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.23:1 |
| White text | 4.95:1 |
Values
| HEX | #556EAF |
| RGB | rgb(85, 110, 175) |
| HSL | hsl(223, 36%, 51%) |
| OKLCH | oklch(54.8% 0.106 267) |
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 #556EAF | 4.95:1 | AA | Lc -79.6 | Fine for body text |
| Black text on #556EAF | 4.23:1 | AA large text | Lc 29.9 | Dividers and decoration only |
| #556EAF text on white | 4.95:1 | AA | Lc 74.2 | Content text, not long reading |
| #556EAF text on black | 4.23:1 | AA large text | Lc -27.5 | 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
#D1D9EB
oklch(88.5% 0.026 266.6)
-
Step 300
300
#B3C0E0
oklch(80.8% 0.047 267.8)
-
Step 400
400
#8BA0D1
oklch(70.8% 0.076 266.5)
-
Step 500
500
#6F87C5
oklch(63% 0.098 267.4)
-
Step 600
600 (this color)
#556EAF
oklch(54.8% 0.106 267)
-
Step 700
700
#475E99
oklch(49.1% 0.099 266.7)
-
Step 800
800
#3B4D7C
oklch(42.8% 0.082 267.1)
-
Step 900
900
#324064
oklch(37.7% 0.065 267.1)
-
Step 950
950
#1D263A
oklch(27% 0.04 265.3)
#556EAF 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) | #5574B2 | 0.017 |
| Deuteranopia (no green cones) | #4B6CAE | 0.014 |
| Tritanopia (no blue cones) | #2C7C86 | 0.095 |
| Achromatopsia (no color) | #707070 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556EAF
#556EAF
oklch(54.8% 0.106 267)
- #8C6C13
#8C6C13
oklch(54.8% 0.106 86.6)
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 #556EAF, 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 0.032
- Windows Blue #3778BF ΔE 0.040
- Muted Blue #3B719F ΔE 0.041
- Dull Blue #49759C ΔE 0.043
- Mid Blue #276AB3 ΔE 0.048
- Stormy Blue #507B9C ΔE 0.054
- Cerulean #457B9D ΔE 0.055
Use #556EAF 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.