#507CC4
Closest named color: Windows Blue (#3778BF). oklch(58.8% 0.121 259.8), rgb(80, 124, 196).
Aa
Black text reads best on this color (5.02:1).
About this color
#507CC4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.121 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.028 away. Black text reads best on it, at 5.02:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 5.02:1 |
| White text | 4.18:1 |
Values
| HEX | #507CC4 |
| RGB | rgb(80, 124, 196) |
| HSL | hsl(217, 50%, 54%) |
| OKLCH | oklch(58.8% 0.121 259.8) |
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 #507CC4 | 4.18:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #507CC4 | 5.02:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #507CC4 text on white | 4.18:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #507CC4 text on black | 5.02:1 | AA | Lc -33.0 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAEE
oklch(88.5% 0.03 260.7)
-
Step 300
300
#ACC2E5
oklch(80.9% 0.055 259.6)
-
Step 400
400
#80A2D7
oklch(70.7% 0.087 259.1)
-
Step 500
500
#608ACD
oklch(63.2% 0.112 259.4)
-
Step 600
600 (this color)
#507CC4
oklch(58.8% 0.121 259.8)
-
Step 700
700
#3860A0
oklch(49.2% 0.113 259.4)
-
Step 800
800
#2F4E82
oklch(42.7% 0.094 260.2)
-
Step 900
900
#2A4168
oklch(37.6% 0.073 260.4)
-
Step 950
950
#19263D
oklch(26.9% 0.047 261.3)
#507CC4 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) | #5E82C7 | 0.024 |
| Deuteranopia (no green cones) | #4E77C2 | 0.014 |
| Tritanopia (no blue cones) | #008C97 | 0.104 |
| Achromatopsia (no color) | #7C7C7C | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #507CC4
#507CC4
oklch(58.8% 0.121 259.8)
- #A27302
#A27302
oklch(58.8% 0.121 80)
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 #507CC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.028
- Cool Blue #4984B8 ΔE 0.033
- Steel Blue #4682B4 ΔE 0.035
- Water Blue #0E87CC ΔE 0.045
- Off Blue #5684AE ΔE 0.046
- Dusty Blue #5A86AD ΔE 0.052
- Flat Blue #3C73A8 ΔE 0.053
- Nice Blue #107AB0 ΔE 0.056
Use #507CC4 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.