#518FCE
Closest named color: Faded Blue (#658CBB). oklch(63.6% 0.115 250.4), rgb(81, 143, 206).
Aa
Black text reads best on this color (6.17:1).
About this color
#518FCE is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.115 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.033 away. Black text reads best on it, at 6.17:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.17:1 |
| White text | 3.40:1 |
Values
| HEX | #518FCE |
| RGB | rgb(81, 143, 206) |
| HSL | hsl(210, 56%, 56%) |
| OKLCH | oklch(63.6% 0.115 250.4) |
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 #518FCE | 3.40:1 | AA large text | Lc -66.8 | Content text, not long reading |
| Black text on #518FCE | 6.17:1 | AA | Lc 42.7 | Non-text elements, placeholder text |
| #518FCE text on white | 3.40:1 | AA large text | Lc 61.3 | Content text, not long reading |
| #518FCE text on black | 6.17:1 | AA | Lc -40.4 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CADBEE
oklch(88.5% 0.032 251.1)
-
Step 300
300
#A6C4E4
oklch(80.9% 0.056 250.2)
-
Step 400
400
#75A5D7
oklch(70.7% 0.09 250.2)
-
Step 500
500 (this color)
#518FCE
oklch(63.6% 0.115 250.4)
-
Step 600
600
#3176B9
oklch(55.5% 0.125 250.6)
-
Step 700
700
#2363A0
oklch(49.1% 0.117 250.7)
-
Step 800
800
#1F5181
oklch(42.6% 0.096 250.4)
-
Step 900
900
#1F4468
oklch(37.8% 0.075 249.9)
-
Step 950
950
#13283D
oklch(27.1% 0.048 250)
#518FCE 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) | #7492D1 | 0.040 |
| Deuteranopia (no green cones) | #6386CD | 0.028 |
| Tritanopia (no blue cones) | #009EA5 | 0.095 |
| Achromatopsia (no color) | #8B8B8B | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #518FCE
#518FCE
oklch(63.6% 0.115 250.4)
- #B77D31
#B77D31
oklch(63.5% 0.115 69.9)
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 #518FCE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.033
- Dark Sky Blue #448EE4 ΔE 0.035
- Cool Blue #4984B8 ΔE 0.043
- Water Blue #0E87CC ΔE 0.048
- Chefchaouen Blue #4895EF ΔE 0.049
- Dusty Blue #5A86AD ΔE 0.050
- Off Blue #5684AE ΔE 0.051
- Steel Blue #4682B4 ΔE 0.051
Use #518FCE 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.