#477FCA
Closest named color: Windows Blue (#3778BF). oklch(59.4% 0.13 256.3), rgb(71, 127, 202).
Aa
Black text reads best on this color (5.15:1).
About this color
#477FCA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.130 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.030 away. Black text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 5.15:1 |
| White text | 4.07:1 |
Values
| HEX | #477FCA |
| RGB | rgb(71, 127, 202) |
| HSL | hsl(214, 55%, 54%) |
| OKLCH | oklch(59.4% 0.13 256.3) |
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 #477FCA | 4.07:1 | AA large text | Lc -73.2 | Content text, not long reading |
| Black text on #477FCA | 5.15:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #477FCA text on white | 4.07:1 | AA large text | Lc 67.7 | Content text, not long reading |
| #477FCA text on black | 5.15:1 | AA | Lc -34.0 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CADBF1
oklch(88.6% 0.035 254.9)
-
Step 300
300
#A6C3EA
oklch(80.9% 0.064 255.9)
-
Step 400
400
#76A3DF
oklch(70.7% 0.101 255.9)
-
Step 500
500 (this color)
#477FCA
oklch(59.4% 0.13 256.3)
-
Step 600
600
#3573C4
oklch(55.6% 0.141 256.2)
-
Step 700
700
#2860A9
oklch(49.1% 0.131 256.4)
-
Step 800
800
#224F89
oklch(42.8% 0.108 256)
-
Step 900
900
#21426E
oklch(37.8% 0.085 256.3)
-
Step 950
950
#142740
oklch(27% 0.053 255.8)
#477FCA 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) | #5E85CD | 0.031 |
| Deuteranopia (no green cones) | #4B78C8 | 0.019 |
| Tritanopia (no blue cones) | #00909B | 0.105 |
| Achromatopsia (no color) | #7E7E7E | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #477FCA
#477FCA
oklch(59.4% 0.13 256.3)
- #A87200
#A87200
oklch(59.3% 0.125 76)
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 #477FCA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.030
- Water Blue #0E87CC ΔE 0.034
- Cool Blue #4984B8 ΔE 0.034
- Steel Blue #4682B4 ΔE 0.037
- Off Blue #5684AE ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.051
- Dusty Blue #5A86AD ΔE 0.057
- Nice Blue #107AB0 ΔE 0.057
Use #477FCA 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.