#509CFD
Closest named color: Chefchaouen Blue (#4895EF). oklch(69% 0.162 255.6), rgb(80, 156, 253).
Aa
Black text reads best on this color (7.51:1).
About this color
#509CFD is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.162 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.028 away. Black text reads best on it, at 7.51:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.51:1 |
| White text | 2.79:1 |
Values
| HEX | #509CFD |
| RGB | rgb(80, 156, 253) |
| HSL | hsl(214, 98%, 65%) |
| OKLCH | oklch(69% 0.162 255.6) |
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 #509CFD | 2.79:1 | Fails | Lc -58.7 | Large or bold text, headings |
| Black text on #509CFD | 7.51:1 | AAA | Lc 50.5 | Large or bold text, headings |
| #509CFD text on white | 2.79:1 | Fails | Lc 53.5 | Large or bold text, headings |
| #509CFD text on black | 7.51:1 | AAA | Lc -48.4 | 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
#C1DBFF
oklch(88.4% 0.057 256.6)
-
Step 300
300
#97C4FF
oklch(81% 0.097 255.4)
-
Step 400
400 (this color)
#509CFD
oklch(69% 0.162 255.6)
-
Step 500
500
#1986FF
oklch(63% 0.202 255.7)
-
Step 600
600
#0070DD
oklch(55.6% 0.187 255.6)
-
Step 700
700
#005EBB
oklch(49.1% 0.165 255.5)
-
Step 800
800
#004C9B
oklch(42.6% 0.144 255.8)
-
Step 900
900
#003F83
oklch(37.6% 0.128 255.9)
-
Step 950
950
#03254F
oklch(26.9% 0.086 256.1)
#509CFD 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) | #70A3FF | 0.038 |
| Deuteranopia (no green cones) | #5593FB | 0.023 |
| Tritanopia (no blue cones) | #00B3C0 | 0.129 |
| Achromatopsia (no color) | #9B9B9B | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509CFD
#509CFD
oklch(69% 0.162 255.6)
- #CE8C00
#CE8C00
oklch(68.9% 0.145 75.5)
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 #509CFD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.028
- Cornflower Blue #6495ED ΔE 0.030
- Dodger Blue #1E90FF ΔE 0.047
- Dark Sky Blue #448EE4 ΔE 0.051
- Soft Blue #6488EA ΔE 0.054
- Periwinkle Blue #8F99FB ΔE 0.067
- Lavender Blue #8B88F8 ΔE 0.076
- Perrywinkle #8F8CE7 ΔE 0.078
Use #509CFD 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.