#518FCD
Closest named color: Faded Blue (#658CBB). oklch(63.5% 0.114 250), rgb(81, 143, 205).
Aa
Black text reads best on this color (6.16:1).
About this color
#518FCD is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.114 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.031 away. Black text reads best on it, at 6.16:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.16:1 |
| White text | 3.40:1 |
Values
| HEX | #518FCD |
| RGB | rgb(81, 143, 205) |
| HSL | hsl(210, 55%, 56%) |
| OKLCH | oklch(63.5% 0.114 250) |
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 #518FCD | 3.40:1 | AA large text | Lc -66.9 | Content text, not long reading |
| Black text on #518FCD | 6.16:1 | AA | Lc 42.7 | Non-text elements, placeholder text |
| #518FCD text on white | 3.40:1 | AA large text | Lc 61.4 | Content text, not long reading |
| #518FCD text on black | 6.16:1 | AA | Lc -40.3 | 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
#CADBED
oklch(88.4% 0.031 249.7)
-
Step 300
300
#A6C4E4
oklch(80.9% 0.056 250.2)
-
Step 400
400
#75A5D6
oklch(70.7% 0.089 249.7)
-
Step 500
500 (this color)
#518FCD
oklch(63.5% 0.114 250)
-
Step 600
600
#3177B8
oklch(55.6% 0.123 249.6)
-
Step 700
700
#23639F
oklch(49% 0.116 250.3)
-
Step 800
800
#1F5181
oklch(42.6% 0.096 250.4)
-
Step 900
900
#1F4467
oklch(37.7% 0.074 249.2)
-
Step 950
950
#13283D
oklch(27.1% 0.048 250)
#518FCD 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) | #7592D0 | 0.042 |
| Deuteranopia (no green cones) | #6486CC | 0.029 |
| Tritanopia (no blue cones) | #009DA5 | 0.092 |
| Achromatopsia (no color) | #8B8B8B | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #518FCD
#518FCD
oklch(63.5% 0.114 250)
- #B67D33
#B67D33
oklch(63.4% 0.114 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 #518FCD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.031
- Dark Sky Blue #448EE4 ΔE 0.037
- Cool Blue #4984B8 ΔE 0.042
- Water Blue #0E87CC ΔE 0.048
- Dusty Blue #5A86AD ΔE 0.049
- Off Blue #5684AE ΔE 0.050
- Steel Blue #4682B4 ΔE 0.050
- Chefchaouen Blue #4895EF ΔE 0.050
Use #518FCD 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.