#519CD9
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.1% 0.118 245.4), rgb(81, 156, 217).
Aa
Black text reads best on this color (7.10:1).
About this color
#519CD9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.118 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.043 away. Black text reads best on it, at 7.10:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.10:1 |
| White text | 2.95:1 |
Values
| HEX | #519CD9 |
| RGB | rgb(81, 156, 217) |
| HSL | hsl(207, 64%, 58%) |
| OKLCH | oklch(67.1% 0.118 245.4) |
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 #519CD9 | 2.95:1 | Fails | Lc -61.2 | Content text, not long reading |
| Black text on #519CD9 | 7.10:1 | AAA | Lc 48.2 | Large or bold text, headings |
| #519CD9 text on white | 2.95:1 | Fails | Lc 55.8 | Large or bold text, headings |
| #519CD9 text on black | 7.10:1 | AAA | Lc -45.9 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFECF8
oklch(93.7% 0.021 245.9)
-
Step 200
200
#C4DDF3
oklch(88.6% 0.04 244.8)
-
Step 300
300
#99C6EE
oklch(80.9% 0.074 245.7)
-
Step 400
400 (this color)
#519CD9
oklch(67.1% 0.118 245.4)
-
Step 500
500
#1E90DE
oklch(63.2% 0.151 245.4)
-
Step 600
600
#0079C0
oklch(55.7% 0.141 245.3)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#004571
oklch(37.8% 0.096 245.5)
-
Step 950
950
#052943
oklch(27.1% 0.062 245.1)
#519CD9 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) | #819EDC | 0.052 |
| Deuteranopia (no green cones) | #6F90D8 | 0.041 |
| Tritanopia (no blue cones) | #00ABB1 | 0.091 |
| Achromatopsia (no color) | #969696 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #519CD9
#519CD9
oklch(67.1% 0.118 245.4)
- #C6853F
#C6853F
oklch(67% 0.117 65.3)
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 #519CD9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.043
- Cornflower Blue #6495ED ΔE 0.043
- Dark Sky Blue #448EE4 ΔE 0.048
- Faded Blue #658CBB ΔE 0.055
- Soft Blue #6488EA ΔE 0.066
- Greyblue #77A1B5 ΔE 0.069
- Water Blue #0E87CC ΔE 0.076
- Cool Blue #4984B8 ΔE 0.077
Use #519CD9 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.