#497DCB
Closest named color: Windows Blue (#3778BF). oklch(59.1% 0.132 258.3), rgb(73, 125, 203).
Aa
Black text reads best on this color (5.07:1).
About this color
#497DCB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.132 and its hue 258°. 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 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 5.07:1 |
| White text | 4.13:1 |
Values
| HEX | #497DCB |
| RGB | rgb(73, 125, 203) |
| HSL | hsl(216, 56%, 54%) |
| OKLCH | oklch(59.1% 0.132 258.3) |
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 #497DCB | 4.13:1 | AA large text | Lc -73.7 | Content text, not long reading |
| Black text on #497DCB | 5.07:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #497DCB text on white | 4.13:1 | AA large text | Lc 68.2 | Content text, not long reading |
| #497DCB text on black | 5.07:1 | AA | Lc -33.5 | 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
#CCDAF0
oklch(88.5% 0.034 259.4)
-
Step 300
300
#A9C2E8
oklch(80.8% 0.061 258.7)
-
Step 400
400
#7CA2DC
oklch(70.7% 0.095 258.6)
-
Step 500
500
#5A8AD2
oklch(63.1% 0.121 258.3)
-
Step 600
600 (this color)
#497DCB
oklch(59.1% 0.132 258.3)
-
Step 700
700
#3160A5
oklch(49.2% 0.122 258.1)
-
Step 800
800
#294E86
oklch(42.6% 0.103 258.5)
-
Step 900
900
#26426B
oklch(37.8% 0.078 257.9)
-
Step 950
950
#17273F
oklch(27.2% 0.05 258.3)
#497DCB 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) | #5B83CE | 0.027 |
| Deuteranopia (no green cones) | #4877C9 | 0.016 |
| Tritanopia (no blue cones) | #008F9A | 0.110 |
| Achromatopsia (no color) | #7D7D7D | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #497DCB
#497DCB
oklch(59.1% 0.132 258.3)
- #A57300
#A57300
oklch(59.2% 0.123 78.4)
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 #497DCB, 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 0.039
- Cool Blue #4984B8 ΔE 0.039
- Steel Blue #4682B4 ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.054
- Off Blue #5684AE ΔE 0.055
- Nice Blue #107AB0 ΔE 0.059
- Flat Blue #3C73A8 ΔE 0.060
Use #497DCB 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.