#507DC6
Closest named color: Windows Blue (#3778BF). oklch(59.1% 0.123 259.7), rgb(80, 125, 198).
Aa
Black text reads best on this color (5.08:1).
About this color
#507DC6 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.123 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.031 away. Black text reads best on it, at 5.08:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 5.08:1 |
| White text | 4.12:1 |
Values
| HEX | #507DC6 |
| RGB | rgb(80, 125, 198) |
| HSL | hsl(217, 51%, 55%) |
| OKLCH | oklch(59.1% 0.123 259.7) |
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 #507DC6 | 4.12:1 | AA large text | Lc -73.7 | Content text, not long reading |
| Black text on #507DC6 | 5.08:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #507DC6 text on white | 4.12:1 | AA large text | Lc 68.2 | Content text, not long reading |
| #507DC6 text on black | 5.08:1 | 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
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CDDAEE
oklch(88.5% 0.031 258.9)
-
Step 300
300
#ACC2E5
oklch(80.9% 0.055 259.6)
-
Step 400
400
#80A2D8
oklch(70.8% 0.088 259.5)
-
Step 500
500
#608ACE
oklch(63.2% 0.113 259.7)
-
Step 600
600 (this color)
#507DC6
oklch(59.1% 0.123 259.7)
-
Step 700
700
#3760A1
oklch(49.2% 0.114 259.3)
-
Step 800
800
#2E4E82
oklch(42.6% 0.095 259.7)
-
Step 900
900
#294168
oklch(37.6% 0.074 259.7)
-
Step 950
950
#18263D
oklch(26.8% 0.047 260)
#507DC6 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) | #5E83C9 | 0.024 |
| Deuteranopia (no green cones) | #4F78C4 | 0.014 |
| Tritanopia (no blue cones) | #008D98 | 0.105 |
| Achromatopsia (no color) | #7D7D7D | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #507DC6
#507DC6
oklch(59.1% 0.123 259.7)
- #A47400
#A47400
oklch(59.2% 0.123 79.7)
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 #507DC6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.031
- Cool Blue #4984B8 ΔE 0.033
- Steel Blue #4682B4 ΔE 0.036
- Water Blue #0E87CC ΔE 0.043
- Off Blue #5684AE ΔE 0.047
- Dusty Blue #5A86AD ΔE 0.053
- Faded Blue #658CBB ΔE 0.057
- Flat Blue #3C73A8 ΔE 0.057
Use #507DC6 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.