#518ABB
Closest named color: Cool Blue (#4984B8). oklch(61.5% 0.096 246.1), rgb(81, 138, 187).
Aa
Black text reads best on this color (5.70:1).
About this color
#518ABB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.096 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.020 away. Black text reads best on it, at 5.70:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.70:1 |
| White text | 3.68:1 |
Values
| HEX | #518ABB |
| RGB | rgb(81, 138, 187) |
| HSL | hsl(208, 44%, 53%) |
| OKLCH | oklch(61.5% 0.096 246.1) |
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 #518ABB | 3.68:1 | AA large text | Lc -69.7 | Content text, not long reading |
| Black text on #518ABB | 5.70:1 | AA | Lc 39.8 | Non-text elements, placeholder text |
| #518ABB text on white | 3.68:1 | AA large text | Lc 64.3 | Content text, not long reading |
| #518ABB text on black | 5.70:1 | AA | Lc -37.4 | 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
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CCDBEA
oklch(88.5% 0.026 248.1)
-
Step 300
300
#A9C4DE
oklch(80.9% 0.047 247.4)
-
Step 400
400
#7AA6CD
oklch(70.8% 0.075 245.9)
-
Step 500
500 (this color)
#518ABB
oklch(61.5% 0.096 246.1)
-
Step 600
600
#3978AD
oklch(55.6% 0.105 246.6)
-
Step 700
700
#2B6594
oklch(49.1% 0.097 246.1)
-
Step 800
800
#255378
oklch(42.8% 0.08 245.5)
-
Step 900
900
#234561
oklch(37.8% 0.063 245.4)
-
Step 950
950
#152839
oklch(26.9% 0.04 246.9)
#518ABB 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) | #758BBD | 0.042 |
| Deuteranopia (no green cones) | #6780BA | 0.034 |
| Tritanopia (no blue cones) | #00969B | 0.080 |
| Achromatopsia (no color) | #858585 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #518ABB
#518ABB
oklch(61.5% 0.096 246.1)
- #AC7842
#AC7842
oklch(61.4% 0.096 65.4)
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 #518ABB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.020
- Dusty Blue #5A86AD ΔE 0.022
- Off Blue #5684AE ΔE 0.022
- Faded Blue #658CBB ΔE 0.023
- Steel Blue #4682B4 ΔE 0.027
- Blue NCS #118AB2 ΔE 0.043
- Water Blue #0E87CC ΔE 0.048
- Silver Lake Blue #778DA9 ΔE 0.052
Use #518ABB 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.