#497DD9
Closest named color: Dark Sky Blue (#448EE4). oklch(59.9% 0.151 260.9), rgb(73, 125, 217).
Aa
Black text reads best on this color (5.21:1).
About this color
#497DD9 is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.151 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.045 away. Black text reads best on it, at 5.21:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.21:1 |
| White text | 4.02:1 |
Values
| HEX | #497DD9 |
| RGB | rgb(73, 125, 217) |
| HSL | hsl(218, 65%, 57%) |
| OKLCH | oklch(59.9% 0.151 260.9) |
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 #497DD9 | 4.02:1 | AA large text | Lc -72.7 | Content text, not long reading |
| Black text on #497DD9 | 5.21:1 | AA | Lc 36.9 | Non-text elements, placeholder text |
| #497DD9 text on white | 4.02:1 | AA large text | Lc 67.2 | Content text, not long reading |
| #497DD9 text on black | 5.21:1 | AA | Lc -34.4 | 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
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF5
oklch(88.5% 0.041 260.9)
-
Step 300
300
#A6C2F1
oklch(81% 0.073 260.7)
-
Step 400
400
#76A0EA
oklch(70.6% 0.118 261.2)
-
Step 500
500 (this color)
#497DD9
oklch(59.9% 0.151 260.9)
-
Step 600
600
#376FD2
oklch(55.7% 0.164 260.8)
-
Step 700
700
#295CB6
oklch(49.1% 0.153 260.8)
-
Step 800
800
#234B93
oklch(42.6% 0.127 261.1)
-
Step 900
900
#214075
oklch(37.7% 0.098 260.4)
-
Step 950
950
#142645
oklch(27.1% 0.063 260.6)
#497DD9 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) | #5286DD | 0.027 |
| Deuteranopia (no green cones) | #3A78D7 | 0.021 |
| Tritanopia (no blue cones) | #0092A0 | 0.124 |
| Achromatopsia (no color) | #7F7F7F | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #497DD9
#497DD9
oklch(59.9% 0.151 260.9)
- #A57700
#A57700
oklch(60% 0.124 81.5)
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 #497DD9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.045
- Windows Blue #3778BF ΔE 0.045
- Water Blue #0E87CC ΔE 0.047
- Soft Blue #6488EA ΔE 0.050
- Royal Blue #4169E1 ΔE 0.056
- Cool Blue #4984B8 ΔE 0.058
- Clear Blue #247AFD ΔE 0.061
- Cornflower #6A79F7 ΔE 0.061
Use #497DD9 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.