#519DEE
Closest named color: Chefchaouen Blue (#4895EF). oklch(68.4% 0.142 251.9), rgb(81, 157, 238).
Aa
Black text reads best on this color (7.40:1).
About this color
#519DEE is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.142 and its hue 252°. 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 7.40:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.40:1 |
| White text | 2.83:1 |
Values
| HEX | #519DEE |
| RGB | rgb(81, 157, 238) |
| HSL | hsl(211, 82%, 63%) |
| OKLCH | oklch(68.4% 0.142 251.9) |
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 #519DEE | 2.83:1 | Fails | Lc -59.4 | Large or bold text, headings |
| Black text on #519DEE | 7.40:1 | AAA | Lc 49.9 | Large or bold text, headings |
| #519DEE text on white | 2.83:1 | Fails | Lc 54.1 | Large or bold text, headings |
| #519DEE text on black | 7.40:1 | AAA | Lc -47.7 | 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
#DEEBFB
oklch(93.5% 0.026 253.6)
-
Step 200
200
#C2DCFA
oklch(88.5% 0.05 252.1)
-
Step 300
300
#97C5F9
oklch(81% 0.089 252)
-
Step 400
400 (this color)
#519DEE
oklch(68.4% 0.142 251.9)
-
Step 500
500
#148BF2
oklch(63.1% 0.181 251.8)
-
Step 600
600
#0074D0
oklch(55.6% 0.166 251.9)
-
Step 700
700
#0061B0
oklch(49% 0.147 252)
-
Step 800
800
#004F92
oklch(42.6% 0.129 252.3)
-
Step 900
900
#00427B
oklch(37.7% 0.113 252.1)
-
Step 950
950
#042749
oklch(27% 0.074 251.8)
#519DEE 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) | #79A2F1 | 0.044 |
| Deuteranopia (no green cones) | #6393EC | 0.029 |
| Tritanopia (no blue cones) | #00B0BA | 0.112 |
| Achromatopsia (no color) | #999999 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #519DEE
#519DEE
oklch(68.4% 0.142 251.9)
- #CF8914
#CF8914
oklch(68.5% 0.142 72)
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 #519DEE, 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 0.025
- Dark Sky Blue #448EE4 ΔE 0.044
- Soft Blue #6488EA ΔE 0.055
- Dodger Blue #1E90FF ΔE 0.058
- Periwinkle Blue #8F99FB ΔE 0.071
- Perrywinkle #8F8CE7 ΔE 0.076
- Faded Blue #658CBB ΔE 0.079
Use #519DEE 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.