#519FEF
Closest named color: Cornflower Blue (#6495ED). oklch(68.9% 0.141 251.1), rgb(81, 159, 239).
Aa
Black text reads best on this color (7.55:1).
About this color
#519FEF is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.141 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.029 away. Black text reads best on it, at 7.55:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.55:1 |
| White text | 2.77:1 |
Values
| HEX | #519FEF |
| RGB | rgb(81, 159, 239) |
| HSL | hsl(210, 83%, 63%) |
| OKLCH | oklch(68.9% 0.141 251.1) |
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 #519FEF | 2.77:1 | Fails | Lc -58.6 | Large or bold text, headings |
| Black text on #519FEF | 7.55:1 | AAA | Lc 50.7 | Large or bold text, headings |
| #519FEF text on white | 2.77:1 | Fails | Lc 53.3 | Large or bold text, headings |
| #519FEF text on black | 7.55:1 | AAA | Lc -48.5 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DEECFB
oklch(93.7% 0.025 250)
-
Step 200
200
#C2DCF9
oklch(88.5% 0.049 251.2)
-
Step 300
300
#96C5F8
oklch(80.9% 0.088 251)
-
Step 400
400 (this color)
#519FEF
oklch(68.9% 0.141 251.1)
-
Step 500
500
#0C8BF1
oklch(63% 0.181 251.2)
-
Step 600
600
#0075CE
oklch(55.7% 0.162 251.1)
-
Step 700
700
#0062AE
oklch(49.1% 0.143 251.1)
-
Step 800
800
#005090
oklch(42.7% 0.125 251.1)
-
Step 900
900
#004279
oklch(37.6% 0.11 251.3)
-
Step 950
950
#032749
oklch(27% 0.074 251.3)
#519FEF 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) | #7CA3F2 | 0.046 |
| Deuteranopia (no green cones) | #6694ED | 0.032 |
| Tritanopia (no blue cones) | #00B2BC | 0.110 |
| Achromatopsia (no color) | #9B9B9B | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #519FEF
#519FEF
oklch(68.9% 0.141 251.1)
- #D18A1A
#D18A1A
oklch(69% 0.142 71.2)
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 #519FEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.029
- Chefchaouen Blue #4895EF ΔE 0.029
- Dark Sky Blue #448EE4 ΔE 0.049
- Soft Blue #6488EA ΔE 0.060
- Dodger Blue #1E90FF ΔE 0.061
- Periwinkle Blue #8F99FB ΔE 0.071
- Perrywinkle #8F8CE7 ΔE 0.078
- Faded Blue #658CBB ΔE 0.082
Use #519FEF 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.