#477CD3
Closest named color: Windows Blue (#3778BF). oklch(59.2% 0.145 259.8), rgb(71, 124, 211).
Aa
Black text reads best on this color (5.09:1).
About this color
#477CD3 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.145 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.036 away. Black text reads best on it, at 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 5.09:1 |
| White text | 4.12:1 |
Values
| HEX | #477CD3 |
| RGB | rgb(71, 124, 211) |
| HSL | hsl(217, 61%, 55%) |
| OKLCH | oklch(59.2% 0.145 259.8) |
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 #477CD3 | 4.12:1 | AA large text | Lc -73.6 | Content text, not long reading |
| Black text on #477CD3 | 5.09:1 | AA | Lc 36.0 | Non-text elements, placeholder text |
| #477CD3 text on white | 4.12:1 | AA large text | Lc 68.1 | Content text, not long reading |
| #477CD3 text on black | 5.09:1 | AA | Lc -33.6 | Non-text elements, placeholder text |
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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CBDAF2
oklch(88.5% 0.037 259.8)
-
Step 300
300
#A8C2EB
oklch(80.9% 0.065 259.4)
-
Step 400
400
#7AA1E2
oklch(70.7% 0.105 260.3)
-
Step 500
500
#5789D9
oklch(63.1% 0.133 259.4)
-
Step 600
600 (this color)
#477CD3
oklch(59.2% 0.145 259.8)
-
Step 700
700
#2F5EAC
oklch(49.1% 0.135 260)
-
Step 800
800
#274D8B
oklch(42.6% 0.112 259.7)
-
Step 900
900
#24416F
oklch(37.7% 0.087 259.3)
-
Step 950
950
#162641
oklch(27% 0.055 260.3)
#477CD3 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) | #5484D6 | 0.027 |
| Deuteranopia (no green cones) | #3E77D1 | 0.017 |
| Tritanopia (no blue cones) | #00909D | 0.118 |
| Achromatopsia (no color) | #7D7D7D | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #477CD3
#477CD3
oklch(59.2% 0.145 259.8)
- #A47400
#A47400
oklch(59.2% 0.123 79.7)
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 #477CD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.036
- Water Blue #0E87CC ΔE 0.043
- Dark Sky Blue #448EE4 ΔE 0.051
- Cool Blue #4984B8 ΔE 0.052
- Steel Blue #4682B4 ΔE 0.055
- Soft Blue #6488EA ΔE 0.057
- Royal Blue #4169E1 ΔE 0.057
- Nice Blue #107AB0 ΔE 0.067
Use #477CD3 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.