#519AFB
Closest named color: Chefchaouen Blue (#4895EF). oklch(68.5% 0.161 256.3), rgb(81, 154, 251).
Aa
Black text reads best on this color (7.36:1).
About this color
#519AFB is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.161 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.023 away. Black text reads best on it, at 7.36:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.36:1 |
| White text | 2.85:1 |
Values
| HEX | #519AFB |
| RGB | rgb(81, 154, 251) |
| HSL | hsl(214, 96%, 65%) |
| OKLCH | oklch(68.5% 0.161 256.3) |
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 #519AFB | 2.85:1 | Fails | Lc -59.6 | Large or bold text, headings |
| Black text on #519AFB | 7.36:1 | AAA | Lc 49.7 | Large or bold text, headings |
| #519AFB text on white | 2.85:1 | Fails | Lc 54.3 | Large or bold text, headings |
| #519AFB text on black | 7.36:1 | AAA | Lc -47.5 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFE
oklch(93.6% 0.029 257.8)
-
Step 200
200
#C2DBFF
oklch(88.5% 0.057 257.5)
-
Step 300
300
#98C3FF
oklch(80.9% 0.097 256.8)
-
Step 400
400 (this color)
#519AFB
oklch(68.5% 0.161 256.3)
-
Step 500
500
#2086FF
oklch(63.1% 0.201 256.3)
-
Step 600
600
#006FE0
oklch(55.6% 0.192 256.3)
-
Step 700
700
#005DBE
oklch(49.2% 0.17 256.3)
-
Step 800
800
#004C9D
oklch(42.8% 0.147 256.2)
-
Step 900
900
#003F84
oklch(37.7% 0.129 256.1)
-
Step 950
950
#04254F
oklch(27% 0.086 256.5)
#519AFB 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) | #6EA2FF | 0.037 |
| Deuteranopia (no green cones) | #5492F9 | 0.020 |
| Tritanopia (no blue cones) | #00B0BE | 0.128 |
| Achromatopsia (no color) | #999999 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #519AFB
#519AFB
oklch(68.5% 0.161 256.3)
- #CB8B00
#CB8B00
oklch(68.4% 0.143 76.2)
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 #519AFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.023
- Cornflower Blue #6495ED ΔE 0.026
- Dodger Blue #1E90FF ΔE 0.045
- Dark Sky Blue #448EE4 ΔE 0.046
- Soft Blue #6488EA ΔE 0.049
- Periwinkle Blue #8F99FB ΔE 0.067
- Lavender Blue #8B88F8 ΔE 0.073
- Perrywinkle #8F8CE7 ΔE 0.075
Use #519AFB 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.