#519BCF
Closest named color: Faded Blue (#658CBB). oklch(66.4% 0.107 241.5), rgb(81, 155, 207).
Aa
Black text reads best on this color (6.93:1).
About this color
#519BCF is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.107 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.046 away. Black text reads best on it, at 6.93:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.93:1 |
| White text | 3.02:1 |
Values
| HEX | #519BCF |
| RGB | rgb(81, 155, 207) |
| HSL | hsl(205, 57%, 56%) |
| OKLCH | oklch(66.4% 0.107 241.5) |
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 #519BCF | 3.02:1 | AA large text | Lc -62.2 | Content text, not long reading |
| Black text on #519BCF | 6.93:1 | AA | Lc 47.2 | Large or bold text, headings |
| #519BCF text on white | 3.02:1 | AA large text | Lc 56.8 | Large or bold text, headings |
| #519BCF text on black | 6.93:1 | AA | Lc -45.0 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF3
oklch(93.5% 0.015 241.8)
-
Step 200
200
#C9DCEB
oklch(88.5% 0.029 241.6)
-
Step 300
300
#A3C6E0
oklch(81% 0.053 240.5)
-
Step 400
400
#70A7D0
oklch(70.6% 0.084 241.6)
-
Step 500
500 (this color)
#519BCF
oklch(66.4% 0.107 241.5)
-
Step 600
600
#227AB1
oklch(55.5% 0.117 241.7)
-
Step 700
700
#136798
oklch(49.2% 0.108 241.3)
-
Step 800
800
#14547B
oklch(42.7% 0.089 241.1)
-
Step 900
900
#194663
oklch(37.8% 0.07 240.6)
-
Step 950
950
#10293A
oklch(27% 0.044 240.8)
#519BCF 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) | #849BD1 | 0.055 |
| Deuteranopia (no green cones) | #738FCE | 0.044 |
| Tritanopia (no blue cones) | #00A8AD | 0.081 |
| Achromatopsia (no color) | #949494 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #519BCF
#519BCF
oklch(66.4% 0.107 241.5)
- #C2834A
#C2834A
oklch(66.3% 0.107 61.4)
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 #519BCF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.046
- Chefchaouen Blue #4895EF ΔE 0.055
- Dark Sky Blue #448EE4 ΔE 0.055
- Cornflower Blue #6495ED ΔE 0.056
- Greyblue #77A1B5 ΔE 0.060
- Silver Lake Blue #778DA9 ΔE 0.066
- Dusty Blue #5A86AD ΔE 0.067
- Cool Blue #4984B8 ΔE 0.069
Use #519BCF 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.