#477FD1
Closest named color: Windows Blue (#3778BF). oklch(59.8% 0.139 257.9), rgb(71, 127, 209).
Aa
Black text reads best on this color (5.22:1).
About this color
#477FD1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.139 and its hue 258°. 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 5.22:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 5.22:1 |
| White text | 4.01:1 |
Values
| HEX | #477FD1 |
| RGB | rgb(71, 127, 209) |
| HSL | hsl(216, 60%, 55%) |
| OKLCH | oklch(59.8% 0.139 257.9) |
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 #477FD1 | 4.01:1 | AA large text | Lc -72.7 | Content text, not long reading |
| Black text on #477FD1 | 5.22:1 | AA | Lc 36.9 | Non-text elements, placeholder text |
| #477FD1 text on white | 4.01:1 | AA large text | Lc 67.2 | Content text, not long reading |
| #477FD1 text on black | 5.22:1 | AA | Lc -34.4 | 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
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CADAF3
oklch(88.4% 0.039 259.3)
-
Step 300
300
#A6C3ED
oklch(81% 0.068 257.6)
-
Step 400
400
#75A2E4
oklch(70.7% 0.109 257.8)
-
Step 500
500 (this color)
#477FD1
oklch(59.8% 0.139 257.9)
-
Step 600
600
#3471CA
oklch(55.5% 0.152 258.1)
-
Step 700
700
#275FAF
oklch(49.2% 0.14 257.9)
-
Step 800
800
#214E8D
oklch(42.8% 0.116 257.5)
-
Step 900
900
#204171
oklch(37.7% 0.091 257.9)
-
Step 950
950
#142642
oklch(26.9% 0.058 258.9)
#477FD1 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) | #5A86D4 | 0.029 |
| Deuteranopia (no green cones) | #4679CF | 0.016 |
| Tritanopia (no blue cones) | #00929E | 0.113 |
| Achromatopsia (no color) | #7F7F7F | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #477FD1
#477FD1
oklch(59.8% 0.139 257.9)
- #A87400
#A87400
oklch(59.7% 0.125 77.5)
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 #477FD1, 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 0.037
- Cool Blue #4984B8 ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.045
- Steel Blue #4682B4 ΔE 0.048
- Soft Blue #6488EA ΔE 0.055
- Off Blue #5684AE ΔE 0.061
- Faded Blue #658CBB ΔE 0.065
Use #477FD1 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.