#518CBB
Closest named color: Faded Blue (#658CBB). oklch(62% 0.095 244.2), rgb(81, 140, 187).
Aa
Black text reads best on this color (5.81:1).
About this color
#518CBB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.095 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 5.81:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.81:1 |
| White text | 3.60:1 |
Values
| HEX | #518CBB |
| RGB | rgb(81, 140, 187) |
| HSL | hsl(207, 44%, 53%) |
| OKLCH | oklch(62% 0.095 244.2) |
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 #518CBB | 3.60:1 | AA large text | Lc -69.0 | Content text, not long reading |
| Black text on #518CBB | 5.81:1 | AA | Lc 40.5 | Non-text elements, placeholder text |
| #518CBB text on white | 3.60:1 | AA large text | Lc 63.5 | Content text, not long reading |
| #518CBB text on black | 5.81:1 | AA | Lc -38.1 | 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
#CBDBE9
oklch(88.4% 0.026 244.5)
-
Step 300
300
#A8C5DD
oklch(81% 0.046 243.3)
-
Step 400
400
#79A6CC
oklch(70.7% 0.074 244.6)
-
Step 500
500 (this color)
#518CBB
oklch(62% 0.095 244.2)
-
Step 600
600
#3779AB
oklch(55.6% 0.103 244.1)
-
Step 700
700
#296693
oklch(49.2% 0.095 244)
-
Step 800
800
#245377
oklch(42.7% 0.079 244.4)
-
Step 900
900
#224560
oklch(37.7% 0.062 243.8)
-
Step 950
950
#152838
oklch(26.9% 0.039 245.4)
#518CBB 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) | #788DBD | 0.045 |
| Deuteranopia (no green cones) | #6982BA | 0.035 |
| Tritanopia (no blue cones) | #00979C | 0.077 |
| Achromatopsia (no color) | #878787 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #518CBB
#518CBB
oklch(62% 0.095 244.2)
- #AE7946
#AE7946
oklch(61.9% 0.095 63.5)
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 #518CBB, 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 0.024
- Cool Blue #4984B8 ΔE 0.025
- Off Blue #5684AE ΔE 0.026
- Steel Blue #4682B4 ΔE 0.032
- Blue NCS #118AB2 ΔE 0.044
- Silver Lake Blue #778DA9 ΔE 0.050
- Water Blue #0E87CC ΔE 0.051
Use #518CBB 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.