#519EFF
Closest named color: Chefchaouen Blue (#4895EF). oklch(69.5% 0.162 255.4), rgb(81, 158, 255).
Aa
Black text reads best on this color (7.68:1).
About this color
#519EFF 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 0.033 away. Black text reads best on it, at 7.68:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.68:1 |
| White text | 2.73:1 |
Values
| HEX | #519EFF |
| RGB | rgb(81, 158, 255) |
| HSL | hsl(213, 100%, 66%) |
| OKLCH | oklch(69.5% 0.162 255.4) |
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 #519EFF | 2.73:1 | Fails | Lc -57.8 | Large or bold text, headings |
| Black text on #519EFF | 7.68:1 | AAA | Lc 51.5 | Large or bold text, headings |
| #519EFF text on white | 2.73:1 | Fails | Lc 52.6 | Large or bold text, headings |
| #519EFF text on black | 7.68:1 | AAA | Lc -49.3 | 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
#C1DCFF
oklch(88.6% 0.056 255)
-
Step 300
300
#96C4FF
oklch(81% 0.097 254.9)
-
Step 400
400 (this color)
#519EFF
oklch(69.5% 0.162 255.4)
-
Step 500
500
#1687FF
oklch(63.2% 0.201 255.3)
-
Step 600
600
#0070DC
oklch(55.6% 0.186 255.4)
-
Step 700
700
#005EBA
oklch(49.1% 0.163 255.3)
-
Step 800
800
#004D9A
oklch(42.7% 0.142 255.2)
-
Step 900
900
#004082
oklch(37.8% 0.125 255.2)
-
Step 950
950
#02254F
oklch(26.9% 0.087 255.6)
#519EFF 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) | #72A5FF | 0.039 |
| Deuteranopia (no green cones) | #5895FD | 0.023 |
| Tritanopia (no blue cones) | #00B5C2 | 0.129 |
| Achromatopsia (no color) | #9C9C9C | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #519EFF
#519EFF
oklch(69.5% 0.162 255.4)
- #D18E00
#D18E00
oklch(69.6% 0.147 75.4)
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 #519EFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.033
- Cornflower Blue #6495ED ΔE 0.033
- Dodger Blue #1E90FF ΔE 0.052
- Dark Sky Blue #448EE4 ΔE 0.057
- Soft Blue #6488EA ΔE 0.060
- Periwinkle Blue #8F99FB ΔE 0.066
- Lavender Blue #8B88F8 ΔE 0.077
- Perrywinkle #8F8CE7 ΔE 0.079
Use #519EFF 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.