#519BFB
Closest named color: Chefchaouen Blue (#4895EF). oklch(68.7% 0.16 255.9), rgb(81, 155, 251).
Aa
Black text reads best on this color (7.43:1).
About this color
#519BFB is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.160 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.024 away. Black text reads best on it, at 7.43:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.43:1 |
| White text | 2.82:1 |
Values
| HEX | #519BFB |
| RGB | rgb(81, 155, 251) |
| HSL | hsl(214, 96%, 65%) |
| OKLCH | oklch(68.7% 0.16 255.9) |
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 #519BFB | 2.82:1 | Fails | Lc -59.2 | Large or bold text, headings |
| Black text on #519BFB | 7.43:1 | AAA | Lc 50.1 | Large or bold text, headings |
| #519BFB text on white | 2.82:1 | Fails | Lc 54.0 | Large or bold text, headings |
| #519BFB text on black | 7.43:1 | AAA | Lc -47.9 | 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
#C2DBFE
oklch(88.4% 0.055 256.8)
-
Step 300
300
#97C3FF
oklch(80.8% 0.098 256.3)
-
Step 400
400 (this color)
#519BFB
oklch(68.7% 0.16 255.9)
-
Step 500
500
#1C86FF
oklch(63% 0.201 256)
-
Step 600
600
#006FDE
oklch(55.5% 0.189 256)
-
Step 700
700
#005DBC
oklch(49% 0.167 256)
-
Step 800
800
#004C9C
oklch(42.7% 0.146 256)
-
Step 900
900
#003F83
oklch(37.6% 0.128 255.9)
-
Step 950
950
#04254E
oklch(26.9% 0.084 256.2)
#519BFB 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) | #6FA2FF | 0.037 |
| Deuteranopia (no green cones) | #5692F9 | 0.023 |
| Tritanopia (no blue cones) | #00B1BF | 0.126 |
| Achromatopsia (no color) | #9A9A9A | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #519BFB
#519BFB
oklch(68.7% 0.16 255.9)
- #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 #519BFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.024
- Cornflower Blue #6495ED ΔE 0.027
- Dodger Blue #1E90FF ΔE 0.047
- Dark Sky Blue #448EE4 ΔE 0.048
- Soft Blue #6488EA ΔE 0.051
- Periwinkle Blue #8F99FB ΔE 0.067
- Lavender Blue #8B88F8 ΔE 0.074
- Perrywinkle #8F8CE7 ΔE 0.076
Use #519BFB 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.