#477FD9
Closest named color: Dark Sky Blue (#448EE4). oklch(60.2% 0.15 259.5), rgb(71, 127, 217).
Aa
Black text reads best on this color (5.30:1).
About this color
#477FD9 is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.150 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.041 away. Black text reads best on it, at 5.30:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.30:1 |
| White text | 3.95:1 |
Values
| HEX | #477FD9 |
| RGB | rgb(71, 127, 217) |
| HSL | hsl(217, 66%, 56%) |
| OKLCH | oklch(60.2% 0.15 259.5) |
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 #477FD9 | 3.95:1 | AA large text | Lc -72.2 | Content text, not long reading |
| Black text on #477FD9 | 5.30:1 | AA | Lc 37.4 | Non-text elements, placeholder text |
| #477FD9 text on white | 3.95:1 | AA large text | Lc 66.7 | Content text, not long reading |
| #477FD9 text on black | 5.30:1 | AA | Lc -35.0 | 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 500.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF8
oklch(93.7% 0.02 257.5)
-
Step 200
200
#CADAF5
oklch(88.5% 0.041 260.9)
-
Step 300
300
#A5C2F0
oklch(80.9% 0.073 259.5)
-
Step 400
400
#74A1E9
oklch(70.6% 0.117 259.5)
-
Step 500
500 (this color)
#477FD9
oklch(60.2% 0.15 259.5)
-
Step 600
600
#3370D1
oklch(55.7% 0.163 259.4)
-
Step 700
700
#255DB5
oklch(49.2% 0.152 259.4)
-
Step 800
800
#204C92
oklch(42.6% 0.125 259.4)
-
Step 900
900
#204075
oklch(37.7% 0.098 259.9)
-
Step 950
950
#132644
oklch(27% 0.061 259.2)
#477FD9 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) | #5587DD | 0.027 |
| Deuteranopia (no green cones) | #3E7AD7 | 0.017 |
| Tritanopia (no blue cones) | #0094A1 | 0.122 |
| Achromatopsia (no color) | #808080 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #477FD9
#477FD9
oklch(60.2% 0.15 259.5)
- #A87700
#A87700
oklch(60.3% 0.125 79.8)
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 #477FD9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.041
- Water Blue #0E87CC ΔE 0.043
- Windows Blue #3778BF ΔE 0.046
- Soft Blue #6488EA ΔE 0.048
- Cool Blue #4984B8 ΔE 0.056
- Steel Blue #4682B4 ΔE 0.060
- Royal Blue #4169E1 ΔE 0.061
- Clear Blue #247AFD ΔE 0.062
Use #477FD9 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.