#5182D2
Closest named color: Dark Sky Blue (#448EE4). oklch(60.9% 0.133 259.7), rgb(81, 130, 210).
Aa
Black text reads best on this color (5.47:1).
About this color
#5182D2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.133 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.038 away. Black text reads best on it, at 5.47:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.47:1 |
| White text | 3.83:1 |
Values
| HEX | #5182D2 |
| RGB | rgb(81, 130, 210) |
| HSL | hsl(217, 59%, 57%) |
| OKLCH | oklch(60.9% 0.133 259.7) |
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 #5182D2 | 3.83:1 | AA large text | Lc -71.1 | Content text, not long reading |
| Black text on #5182D2 | 5.47:1 | AA | Lc 38.4 | Non-text elements, placeholder text |
| #5182D2 text on white | 3.83:1 | AA large text | Lc 65.6 | Content text, not long reading |
| #5182D2 text on black | 5.47:1 | AA | Lc -36.0 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CBDAF2
oklch(88.5% 0.037 259.8)
-
Step 300
300
#A8C2EB
oklch(80.9% 0.065 259.4)
-
Step 400
400
#7AA1E2
oklch(70.7% 0.105 260.3)
-
Step 500
500 (this color)
#5182D2
oklch(60.9% 0.133 259.7)
-
Step 600
600
#3C71C7
oklch(55.6% 0.145 259.6)
-
Step 700
700
#2F5EAC
oklch(49.1% 0.135 260)
-
Step 800
800
#274D8B
oklch(42.6% 0.112 259.7)
-
Step 900
900
#24416F
oklch(37.7% 0.087 259.3)
-
Step 950
950
#162641
oklch(27% 0.055 260.3)
#5182D2 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) | #5F89D5 | 0.026 |
| Deuteranopia (no green cones) | #4E7DD0 | 0.014 |
| Tritanopia (no blue cones) | #0094A0 | 0.112 |
| Achromatopsia (no color) | #828282 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5182D2
#5182D2
oklch(60.9% 0.133 259.7)
- #AA7900
#AA7900
oklch(61% 0.126 80.2)
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 #5182D2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.038
- Water Blue #0E87CC ΔE 0.042
- Cool Blue #4984B8 ΔE 0.043
- Soft Blue #6488EA ΔE 0.045
- Windows Blue #3778BF ΔE 0.047
- Steel Blue #4682B4 ΔE 0.049
- Faded Blue #658CBB ΔE 0.055
- Off Blue #5684AE ΔE 0.058
Use #5182D2 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.