#4973BC
Closest named color: Windows Blue (#3778BF). oklch(56% 0.123 260.8), rgb(73, 115, 188).
Aa
White text reads best on this color (4.70:1).
About this color
#4973BC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.123 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.019 away. White text reads best on it, at 4.70:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.46:1 |
| White text | 4.70:1 |
Values
| HEX | #4973BC |
| RGB | rgb(73, 115, 188) |
| HSL | hsl(218, 46%, 51%) |
| OKLCH | oklch(56% 0.123 260.8) |
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 #4973BC | 4.70:1 | AA | Lc -77.9 | Fine for body text |
| Black text on #4973BC | 4.46:1 | AA large text | Lc 31.6 | Non-text elements, placeholder text |
| #4973BC text on white | 4.70:1 | AA | Lc 72.5 | Content text, not long reading |
| #4973BC text on black | 4.46:1 | AA large text | Lc -29.2 | Dividers and decoration only |
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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAEE
oklch(88.5% 0.03 260.7)
-
Step 300
300
#ADC2E5
oklch(81% 0.055 260.6)
-
Step 400
400
#81A1D8
oklch(70.6% 0.089 261)
-
Step 500
500
#6189CE
oklch(63.1% 0.114 260.8)
-
Step 600
600 (this color)
#4973BC
oklch(56% 0.123 260.8)
-
Step 700
700
#395FA1
oklch(49.1% 0.115 260.7)
-
Step 800
800
#304E82
oklch(42.7% 0.094 260.7)
-
Step 900
900
#2A4169
oklch(37.7% 0.075 260.9)
-
Step 950
950
#19263D
oklch(26.9% 0.047 261.3)
#4973BC 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) | #5479BF | 0.022 |
| Deuteranopia (no green cones) | #446FBA | 0.013 |
| Tritanopia (no blue cones) | #00838E | 0.105 |
| Achromatopsia (no color) | #747474 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4973BC
#4973BC
oklch(56% 0.123 260.8)
- #976C00
#976C00
oklch(56.1% 0.116 81)
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 #4973BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.019
- French Blue #436BAD ΔE 0.031
- Flat Blue #3C73A8 ΔE 0.035
- Mid Blue #276AB3 ΔE 0.044
- Nice Blue #107AB0 ΔE 0.047
- Steel Blue #4682B4 ΔE 0.047
- Muted Blue #3B719F ΔE 0.049
- Cool Blue #4984B8 ΔE 0.050
Use #4973BC 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.