#518FBB
Closest named color: Faded Blue (#658CBB). oklch(62.7% 0.093 241.2), rgb(81, 143, 187).
Aa
Black text reads best on this color (5.99:1).
About this color
#518FBB is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.093 and its hue 241°. 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 5.99:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.99:1 |
| White text | 3.50:1 |
Values
| HEX | #518FBB |
| RGB | rgb(81, 143, 187) |
| HSL | hsl(205, 44%, 53%) |
| OKLCH | oklch(62.7% 0.093 241.2) |
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 #518FBB | 3.50:1 | AA large text | Lc -67.9 | Content text, not long reading |
| Black text on #518FBB | 5.99:1 | AA | Lc 41.6 | Non-text elements, placeholder text |
| #518FBB text on white | 3.50:1 | AA large text | Lc 62.4 | Content text, not long reading |
| #518FBB text on black | 5.99:1 | AA | Lc -39.3 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CBDCE9
oklch(88.6% 0.026 240.7)
-
Step 300
300
#A7C5DC
oklch(80.9% 0.046 241.2)
-
Step 400
400
#77A7CA
oklch(70.7% 0.073 240.7)
-
Step 500
500 (this color)
#518FBB
oklch(62.7% 0.093 241.2)
-
Step 600
600
#347AA9
oklch(55.6% 0.101 241.3)
-
Step 700
700
#266691
oklch(49% 0.094 241.9)
-
Step 800
800
#215475
oklch(42.7% 0.077 240.4)
-
Step 900
900
#21455F
oklch(37.6% 0.061 242.2)
-
Step 950
950
#142937
oklch(27% 0.038 239.4)
#518FBB 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) | #7C8FBD | 0.049 |
| Deuteranopia (no green cones) | #6D84BA | 0.040 |
| Tritanopia (no blue cones) | #009A9E | 0.074 |
| Achromatopsia (no color) | #898989 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #518FBB
#518FBB
oklch(62.7% 0.093 241.2)
- #B17B4B
#B17B4B
oklch(62.7% 0.093 61.5)
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 #518FBB, 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 0.029
- Off Blue #5684AE ΔE 0.032
- Cool Blue #4984B8 ΔE 0.033
- Steel Blue #4682B4 ΔE 0.040
- Blue NCS #118AB2 ΔE 0.046
- Silver Lake Blue #778DA9 ΔE 0.047
- Blue Grey #758DA3 ΔE 0.050
Use #518FBB 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.