#507FCA
Closest named color: Cool Blue (#4984B8). oklch(59.8% 0.126 259.4), rgb(80, 127, 202).
Aa
Black text reads best on this color (5.22:1).
About this color
#507FCA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.126 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.035 away. Black text reads best on it, at 5.22:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.22:1 |
| White text | 4.01:1 |
Values
| HEX | #507FCA |
| RGB | rgb(80, 127, 202) |
| HSL | hsl(217, 54%, 55%) |
| OKLCH | oklch(59.8% 0.126 259.4) |
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 #507FCA | 4.01:1 | AA large text | Lc -72.7 | Content text, not long reading |
| Black text on #507FCA | 5.22:1 | AA | Lc 36.8 | Non-text elements, placeholder text |
| #507FCA text on white | 4.01:1 | AA large text | Lc 67.2 | Content text, not long reading |
| #507FCA text on black | 5.22:1 | 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
#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
#A9C2E9
oklch(80.9% 0.062 259.2)
-
Step 400
400
#7BA2DE
oklch(70.7% 0.098 258.8)
-
Step 500
500 (this color)
#507FCA
oklch(59.8% 0.126 259.4)
-
Step 600
600
#3F72C2
oklch(55.6% 0.136 259.1)
-
Step 700
700
#315FA8
oklch(49.1% 0.128 259.3)
-
Step 800
800
#294E88
oklch(42.7% 0.106 259.1)
-
Step 900
900
#26416D
oklch(37.7% 0.083 259.7)
-
Step 950
950
#162640
oklch(26.9% 0.053 259.7)
#507FCA 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) | #5F85CD | 0.025 |
| Deuteranopia (no green cones) | #4F7AC8 | 0.014 |
| Tritanopia (no blue cones) | #00909B | 0.108 |
| Achromatopsia (no color) | #7F7F7F | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #507FCA
#507FCA
oklch(59.8% 0.126 259.4)
- #A67500
#A67500
oklch(59.7% 0.124 79.4)
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 #507FCA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.035
- Windows Blue #3778BF ΔE 0.036
- Steel Blue #4682B4 ΔE 0.039
- Water Blue #0E87CC ΔE 0.041
- Off Blue #5684AE ΔE 0.049
- Dark Sky Blue #448EE4 ΔE 0.050
- Dusty Blue #5A86AD ΔE 0.055
- Faded Blue #658CBB ΔE 0.055
Use #507FCA 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.