#497DD0
Closest named color: Windows Blue (#3778BF). oklch(59.4% 0.139 259.4), rgb(73, 125, 208).
Aa
Black text reads best on this color (5.12:1).
About this color
#497DD0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.139 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.034 away. Black text reads best on it, at 5.12:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 5.12:1 |
| White text | 4.09:1 |
Values
| HEX | #497DD0 |
| RGB | rgb(73, 125, 208) |
| HSL | hsl(217, 59%, 55%) |
| OKLCH | oklch(59.4% 0.139 259.4) |
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 #497DD0 | 4.09:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #497DD0 | 5.12:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #497DD0 text on white | 4.09:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #497DD0 text on black | 5.12:1 | AA | Lc -33.8 | 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
#E2EAF7
oklch(93.5% 0.02 260.2)
-
Step 200
200
#CBDAF3
oklch(88.5% 0.038 260.7)
-
Step 300
300
#A7C2ED
oklch(80.9% 0.068 259.6)
-
Step 400
400
#77A1E4
oklch(70.6% 0.109 259.5)
-
Step 500
500 (this color)
#497DD0
oklch(59.4% 0.139 259.4)
-
Step 600
600
#3871CA
oklch(55.7% 0.151 259.1)
-
Step 700
700
#2B5EAF
oklch(49.2% 0.14 259.4)
-
Step 800
800
#244D8E
oklch(42.7% 0.117 259.3)
-
Step 900
900
#224171
oklch(37.8% 0.09 258.9)
-
Step 950
950
#152642
oklch(27% 0.057 259.9)
#497DD0 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) | #5884D3 | 0.026 |
| Deuteranopia (no green cones) | #4478CE | 0.015 |
| Tritanopia (no blue cones) | #00909C | 0.115 |
| Achromatopsia (no color) | #7D7D7D | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #497DD0
#497DD0
oklch(59.4% 0.139 259.4)
- #A57400
#A57400
oklch(59.4% 0.123 79.2)
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 #497DD0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.034
- Water Blue #0E87CC ΔE 0.041
- Cool Blue #4984B8 ΔE 0.046
- Steel Blue #4682B4 ΔE 0.049
- Dark Sky Blue #448EE4 ΔE 0.050
- Soft Blue #6488EA ΔE 0.057
- Off Blue #5684AE ΔE 0.062
- Royal Blue #4169E1 ΔE 0.063
Use #497DD0 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.