#518CA3
Closest named color: Dusty Blue (#5A86AD). oklch(60.9% 0.071 225.2), rgb(81, 140, 163).
Aa
Black text reads best on this color (5.62:1).
About this color
#518CA3 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 61%, its chroma 0.071 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.028 away. Black text reads best on it, at 5.62:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.62:1 |
| White text | 3.73:1 |
Values
| HEX | #518CA3 |
| RGB | rgb(81, 140, 163) |
| HSL | hsl(197, 34%, 48%) |
| OKLCH | oklch(60.9% 0.071 225.2) |
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 #518CA3 | 3.73:1 | AA large text | Lc -70.2 | Content text, not long reading |
| Black text on #518CA3 | 5.62:1 | AA | Lc 39.3 | Non-text elements, placeholder text |
| #518CA3 text on white | 3.73:1 | AA large text | Lc 64.7 | Content text, not long reading |
| #518CA3 text on black | 5.62:1 | AA | Lc -36.9 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CCDCE3
oklch(88.5% 0.02 225.7)
-
Step 300
300
#AAC6D2
oklch(81% 0.035 225.6)
-
Step 400
400
#7BA8BB
oklch(70.6% 0.056 225.9)
-
Step 500
500 (this color)
#518CA3
oklch(60.9% 0.071 225.2)
-
Step 600
600
#3B7D95
oklch(55.7% 0.076 224.6)
-
Step 700
700
#2C697F
oklch(49% 0.071 224.9)
-
Step 800
800
#265667
oklch(42.7% 0.059 224)
-
Step 900
900
#244754
oklch(37.7% 0.046 224.4)
-
Step 950
950
#162A31
oklch(27.1% 0.029 222.4)
#518CA3 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) | #7F89A4 | 0.055 |
| Deuteranopia (no green cones) | #7380A3 | 0.049 |
| Tritanopia (no blue cones) | #249393 | 0.049 |
| Achromatopsia (no color) | #848484 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #518CA3
#518CA3
oklch(60.9% 0.071 225.2)
- #A7765F
#A7765F
oklch(61% 0.071 46.1)
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 #518CA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.028
- Off Blue #5684AE ΔE 0.033
- Blue Grey #758DA3 ΔE 0.042
- Steel #738595 ΔE 0.042
- Light Slate Gray #778899 ΔE 0.044
- Blue NCS #118AB2 ΔE 0.045
- Faded Blue #658CBB ΔE 0.045
- Silver Lake Blue #778DA9 ΔE 0.046
Use #518CA3 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.