#509FFF
Closest named color: Chefchaouen Blue (#4895EF). oklch(69.7% 0.162 254.7), rgb(80, 159, 255).
Aa
Black text reads best on this color (7.74:1).
About this color
#509FFF is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.162 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.034 away. Black text reads best on it, at 7.74:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.74:1 |
| White text | 2.71:1 |
Values
| HEX | #509FFF |
| RGB | rgb(80, 159, 255) |
| HSL | hsl(213, 100%, 66%) |
| OKLCH | oklch(69.7% 0.162 254.7) |
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 #509FFF | 2.71:1 | Fails | Lc -57.4 | Large or bold text, headings |
| Black text on #509FFF | 7.74:1 | AAA | Lc 51.8 | Large or bold text, headings |
| #509FFF text on white | 2.71:1 | Fails | Lc 52.2 | Large or bold text, headings |
| #509FFF text on black | 7.74:1 | AAA | Lc -49.6 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DDEBFE
oklch(93.5% 0.03 256)
-
Step 200
200
#C1DCFE
oklch(88.6% 0.055 254.3)
-
Step 300
300
#95C4FF
oklch(80.9% 0.098 254.5)
-
Step 400
400 (this color)
#509FFF
oklch(69.7% 0.162 254.7)
-
Step 500
500
#0C87FF
oklch(63.1% 0.202 254.8)
-
Step 600
600
#0071DA
oklch(55.6% 0.182 254.8)
-
Step 700
700
#005FB8
oklch(49.1% 0.16 254.6)
-
Step 800
800
#004D98
oklch(42.6% 0.139 254.8)
-
Step 900
900
#004080
oklch(37.6% 0.123 254.7)
-
Step 950
950
#02264F
oklch(27.1% 0.085 254.9)
#509FFF 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) | #73A6FF | 0.040 |
| Deuteranopia (no green cones) | #5996FD | 0.023 |
| Tritanopia (no blue cones) | #00B5C3 | 0.125 |
| Achromatopsia (no color) | #9D9D9D | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509FFF
#509FFF
oklch(69.7% 0.162 254.7)
- #D28E00
#D28E00
oklch(69.8% 0.147 75)
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 #509FFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.034
- Cornflower Blue #6495ED ΔE 0.035
- Dodger Blue #1E90FF ΔE 0.054
- Dark Sky Blue #448EE4 ΔE 0.058
- Soft Blue #6488EA ΔE 0.062
- Periwinkle Blue #8F99FB ΔE 0.066
- Lavender Blue #8B88F8 ΔE 0.079
- Perrywinkle #8F8CE7 ΔE 0.081
Use #509FFF 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.