#477ACE
Closest named color: Windows Blue (#3778BF). oklch(58.5% 0.141 259.9), rgb(71, 122, 206).
Aa
Black text reads best on this color (4.94:1).
About this color
#477ACE is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.141 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.029 away. Black text reads best on it, at 4.94:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.94:1 |
| White text | 4.24:1 |
Values
| HEX | #477ACE |
| RGB | rgb(71, 122, 206) |
| HSL | hsl(217, 58%, 54%) |
| OKLCH | oklch(58.5% 0.141 259.9) |
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 #477ACE | 4.24:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #477ACE | 4.94:1 | AA | Lc 35.0 | Non-text elements, placeholder text |
| #477ACE text on white | 4.24:1 | AA large text | Lc 69.1 | Content text, not long reading |
| #477ACE text on black | 4.94:1 | AA | Lc -32.6 | 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
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CCDAF1
oklch(88.5% 0.035 260.4)
-
Step 300
300
#A9C2EA
oklch(80.9% 0.063 259.7)
-
Step 400
400
#7BA1E0
oklch(70.6% 0.102 260.2)
-
Step 500
500
#5989D7
oklch(63.1% 0.129 259.7)
-
Step 600
600 (this color)
#477ACE
oklch(58.5% 0.141 259.9)
-
Step 700
700
#315EAA
oklch(49.1% 0.132 260.2)
-
Step 800
800
#294D89
oklch(42.6% 0.108 260)
-
Step 900
900
#26416E
oklch(37.8% 0.084 260.1)
-
Step 950
950
#162640
oklch(26.9% 0.053 259.7)
#477ACE 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) | #5482D1 | 0.027 |
| Deuteranopia (no green cones) | #3F75CC | 0.017 |
| Tritanopia (no blue cones) | #008D9A | 0.115 |
| Achromatopsia (no color) | #7B7B7B | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #477ACE
#477ACE
oklch(58.5% 0.141 259.9)
- #A17200
#A17200
oklch(58.5% 0.121 79.9)
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 #477ACE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.029
- Water Blue #0E87CC ΔE 0.044
- Cool Blue #4984B8 ΔE 0.049
- Steel Blue #4682B4 ΔE 0.051
- Royal Blue #4169E1 ΔE 0.057
- Dark Sky Blue #448EE4 ΔE 0.058
- Nice Blue #107AB0 ΔE 0.061
- French Blue #436BAD ΔE 0.061
Use #477ACE 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.