#509CE3
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.5% 0.13 248.9), rgb(80, 156, 227).
Aa
Black text reads best on this color (7.20:1).
About this color
#509CE3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.130 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.030 away. Black text reads best on it, at 7.20:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.20:1 |
| White text | 2.91:1 |
Values
| HEX | #509CE3 |
| RGB | rgb(80, 156, 227) |
| HSL | hsl(209, 72%, 60%) |
| OKLCH | oklch(67.5% 0.13 248.9) |
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 #509CE3 | 2.91:1 | Fails | Lc -60.6 | Content text, not long reading |
| Black text on #509CE3 | 7.20:1 | AAA | Lc 48.8 | Large or bold text, headings |
| #509CE3 text on white | 2.91:1 | Fails | Lc 55.3 | Large or bold text, headings |
| #509CE3 text on black | 7.20:1 | AAA | Lc -46.5 | Large or bold text, headings |
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 400.
-
Step 50
50
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DEECF9
oklch(93.6% 0.023 246)
-
Step 200
200
#C3DCF6
oklch(88.4% 0.045 249.4)
-
Step 300
300
#98C6F3
oklch(81% 0.08 248.3)
-
Step 400
400 (this color)
#509CE3
oklch(67.5% 0.13 248.9)
-
Step 500
500
#188DE8
oklch(63% 0.166 249.1)
-
Step 600
600
#0076C8
oklch(55.5% 0.154 249.2)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#004375
oklch(37.5% 0.104 249)
-
Step 950
950
#042846
oklch(27% 0.068 248.6)
#509CE3 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) | #7D9FE6 | 0.048 |
| Deuteranopia (no green cones) | #6991E2 | 0.035 |
| Tritanopia (no blue cones) | #00ADB5 | 0.101 |
| Achromatopsia (no color) | #979797 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509CE3
#509CE3
oklch(67.5% 0.13 248.9)
- #CA862D
#CA862D
oklch(67.5% 0.13 68.8)
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 #509CE3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.030
- Cornflower Blue #6495ED ΔE 0.032
- Dark Sky Blue #448EE4 ΔE 0.042
- Soft Blue #6488EA ΔE 0.058
- Faded Blue #658CBB ΔE 0.065
- Dodger Blue #1E90FF ΔE 0.066
- Perrywinkle #8F8CE7 ΔE 0.079
- Water Blue #0E87CC ΔE 0.079
Use #509CE3 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.