#518FBF
Closest named color: Faded Blue (#658CBB). oklch(62.8% 0.097 243.6), rgb(81, 143, 191).
Aa
Black text reads best on this color (6.03:1).
About this color
#518FBF is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.097 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.021 away. Black text reads best on it, at 6.03:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.03:1 |
| White text | 3.48:1 |
Values
| HEX | #518FBF |
| RGB | rgb(81, 143, 191) |
| HSL | hsl(206, 46%, 53%) |
| OKLCH | oklch(62.8% 0.097 243.6) |
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 #518FBF | 3.48:1 | AA large text | Lc -67.7 | Content text, not long reading |
| Black text on #518FBF | 6.03:1 | AA | Lc 41.9 | Non-text elements, placeholder text |
| #518FBF text on white | 3.48:1 | AA large text | Lc 62.2 | Content text, not long reading |
| #518FBF text on black | 6.03:1 | AA | Lc -39.5 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CBDCEA
oklch(88.6% 0.027 242.8)
-
Step 300
300
#A7C5DE
oklch(81% 0.048 243.5)
-
Step 400
400
#77A6CD
oklch(70.6% 0.076 244.2)
-
Step 500
500 (this color)
#518FBF
oklch(62.8% 0.097 243.6)
-
Step 600
600
#3479AC
oklch(55.5% 0.105 243.8)
-
Step 700
700
#256694
oklch(49.1% 0.098 243.4)
-
Step 800
800
#215378
oklch(42.6% 0.081 243.9)
-
Step 900
900
#214561
oklch(37.7% 0.064 244.1)
-
Step 950
950
#142939
oklch(27.2% 0.04 243)
#518FBF 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) | #7A90C1 | 0.047 |
| Deuteranopia (no green cones) | #6B84BE | 0.039 |
| Tritanopia (no blue cones) | #009B9F | 0.079 |
| Achromatopsia (no color) | #898989 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #518FBF
#518FBF
oklch(62.8% 0.097 243.6)
- #B27B46
#B27B46
oklch(62.8% 0.098 63.4)
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 #518FBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.021
- Dusty Blue #5A86AD ΔE 0.032
- Cool Blue #4984B8 ΔE 0.033
- Off Blue #5684AE ΔE 0.035
- Steel Blue #4682B4 ΔE 0.041
- Blue NCS #118AB2 ΔE 0.048
- Silver Lake Blue #778DA9 ΔE 0.050
- Water Blue #0E87CC ΔE 0.053
Use #518FBF 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.