#507AD9
Closest named color: Windows Blue (#3778BF). oklch(59.6% 0.152 264.3), rgb(80, 122, 217).
Aa
Black text reads best on this color (5.12:1).
About this color
#507AD9 is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.152 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.048 away. Black text reads best on it, at 5.12:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 5.12:1 |
| White text | 4.09:1 |
Values
| HEX | #507AD9 |
| RGB | rgb(80, 122, 217) |
| HSL | hsl(222, 64%, 58%) |
| OKLCH | oklch(59.6% 0.152 264.3) |
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 #507AD9 | 4.09:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #507AD9 | 5.12:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #507AD9 text on white | 4.09:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #507AD9 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
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F5
oklch(88.4% 0.041 265.7)
-
Step 300
300
#A9C1F2
oklch(81% 0.074 264.4)
-
Step 400
400
#7B9FEB
oklch(70.7% 0.119 264.3)
-
Step 500
500 (this color)
#507AD9
oklch(59.6% 0.152 264.3)
-
Step 600
600
#416CD3
oklch(55.6% 0.166 264.6)
-
Step 700
700
#335AB7
oklch(49.2% 0.154 264.3)
-
Step 800
800
#2A4A94
oklch(42.7% 0.128 264.1)
-
Step 900
900
#263E76
oklch(37.6% 0.1 264.6)
-
Step 950
950
#172545
oklch(27% 0.063 264.7)
#507AD9 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) | #4D84DD | 0.026 |
| Deuteranopia (no green cones) | #3778D7 | 0.025 |
| Tritanopia (no blue cones) | #00909F | 0.129 |
| Achromatopsia (no color) | #7D7D7D | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #507AD9
#507AD9
oklch(59.6% 0.152 264.3)
- #A17800
#A17800
oklch(59.7% 0.122 84.6)
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 #507AD9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.048
- Soft Blue #6488EA ΔE 0.050
- Royal Blue #4169E1 ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.052
- Cornflower #6A79F7 ΔE 0.056
- Water Blue #0E87CC ΔE 0.056
- Clear Blue #247AFD ΔE 0.062
- Cool Blue #4984B8 ΔE 0.063
Use #507AD9 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.