#509BFD
Closest named color: Chefchaouen Blue (#4895EF). oklch(68.8% 0.163 256.1), rgb(80, 155, 253).
Aa
Black text reads best on this color (7.44:1).
About this color
#509BFD is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.163 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.026 away. Black text reads best on it, at 7.44:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.44:1 |
| White text | 2.81:1 |
Values
| HEX | #509BFD |
| RGB | rgb(80, 155, 253) |
| HSL | hsl(214, 98%, 65%) |
| OKLCH | oklch(68.8% 0.163 256.1) |
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 #509BFD | 2.81:1 | Fails | Lc -59.1 | Large or bold text, headings |
| Black text on #509BFD | 7.44:1 | AAA | Lc 50.2 | Large or bold text, headings |
| #509BFD text on white | 2.81:1 | Fails | Lc 53.9 | Large or bold text, headings |
| #509BFD text on black | 7.44:1 | AAA | Lc -48.0 | 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
#97C3FF
oklch(80.8% 0.098 256.3)
-
Step 400
400 (this color)
#509BFD
oklch(68.8% 0.163 256.1)
-
Step 500
500
#1E86FF
oklch(63.1% 0.201 256.1)
-
Step 600
600
#006FDF
oklch(55.6% 0.191 256.1)
-
Step 700
700
#005DBD
oklch(49.1% 0.169 256.1)
-
Step 800
800
#004C9C
oklch(42.7% 0.146 256)
-
Step 900
900
#003F84
oklch(37.7% 0.129 256.1)
-
Step 950
950
#03254F
oklch(26.9% 0.086 256.1)
#509BFD 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) | #6EA3FF | 0.038 |
| Deuteranopia (no green cones) | #5492FB | 0.023 |
| Tritanopia (no blue cones) | #00B2C0 | 0.129 |
| Achromatopsia (no color) | #9A9A9A | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #509BFD
#509BFD
oklch(68.8% 0.163 256.1)
- #CD8C00
#CD8C00
oklch(68.8% 0.145 76)
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 #509BFD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.026
- Cornflower Blue #6495ED ΔE 0.029
- Dodger Blue #1E90FF ΔE 0.045
- Dark Sky Blue #448EE4 ΔE 0.049
- Soft Blue #6488EA ΔE 0.052
- Periwinkle Blue #8F99FB ΔE 0.068
- Lavender Blue #8B88F8 ΔE 0.074
- Perrywinkle #8F8CE7 ΔE 0.077
Use #509BFD 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.