#518EB3
Closest named color: Dusty Blue (#5A86AD). oklch(62.1% 0.085 236.9), rgb(81, 142, 179).
Aa
Black text reads best on this color (5.87:1).
About this color
#518EB3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.085 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.023 away. Black text reads best on it, at 5.87:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.87:1 |
| White text | 3.57:1 |
Values
| HEX | #518EB3 |
| RGB | rgb(81, 142, 179) |
| HSL | hsl(203, 39%, 51%) |
| OKLCH | oklch(62.1% 0.085 236.9) |
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 #518EB3 | 3.57:1 | AA large text | Lc -68.7 | Content text, not long reading |
| Black text on #518EB3 | 5.87:1 | AA | Lc 40.9 | Non-text elements, placeholder text |
| #518EB3 text on white | 3.57:1 | AA large text | Lc 63.2 | Content text, not long reading |
| #518EB3 text on black | 5.87:1 | AA | Lc -38.5 | 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
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CCDCE7
oklch(88.6% 0.023 237.7)
-
Step 300
300
#A8C5D8
oklch(80.8% 0.041 236.8)
-
Step 400
400
#79A7C5
oklch(70.6% 0.066 237.5)
-
Step 500
500 (this color)
#518EB3
oklch(62.1% 0.085 236.9)
-
Step 600
600
#367BA2
oklch(55.6% 0.092 236.5)
-
Step 700
700
#28678B
oklch(49% 0.086 237.4)
-
Step 800
800
#235471
oklch(42.6% 0.071 237.7)
-
Step 900
900
#22465B
oklch(37.7% 0.055 236.3)
-
Step 950
950
#152935
oklch(27% 0.034 236.3)
#518EB3 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) | #7D8DB5 | 0.051 |
| Deuteranopia (no green cones) | #6F83B2 | 0.042 |
| Tritanopia (no blue cones) | #06989A | 0.068 |
| Achromatopsia (no color) | #878787 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #518EB3
#518EB3
oklch(62.1% 0.085 236.9)
- #AD7952
#AD7952
oklch(62% 0.085 57.3)
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 #518EB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.023
- Faded Blue #658CBB ΔE 0.026
- Off Blue #5684AE ΔE 0.028
- Cool Blue #4984B8 ΔE 0.034
- Steel Blue #4682B4 ΔE 0.038
- Blue NCS #118AB2 ΔE 0.042
- Silver Lake Blue #778DA9 ΔE 0.043
- Blue Grey #758DA3 ΔE 0.044
Use #518EB3 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.