#5183AA
Closest named color: Off Blue (#5684AE). oklch(59.1% 0.081 243.3), rgb(81, 131, 170).
Aa
Black text reads best on this color (5.17:1).
About this color
#5183AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.081 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.009 away. Black text reads best on it, at 5.17:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.17:1 |
| White text | 4.05:1 |
Values
| HEX | #5183AA |
| RGB | rgb(81, 131, 170) |
| HSL | hsl(206, 35%, 49%) |
| OKLCH | oklch(59.1% 0.081 243.3) |
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 #5183AA | 4.05:1 | AA large text | Lc -73.2 | Content text, not long reading |
| Black text on #5183AA | 5.17:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #5183AA text on white | 4.05:1 | AA large text | Lc 67.7 | Content text, not long reading |
| #5183AA text on black | 5.17:1 | AA | Lc -34.0 | 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 600.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CEDBE6
oklch(88.5% 0.021 243.4)
-
Step 300
300
#ADC4D7
oklch(80.9% 0.037 243.1)
-
Step 400
400
#82A5C3
oklch(70.7% 0.059 244.6)
-
Step 500
500
#618FB3
oklch(63.1% 0.074 242.9)
-
Step 600
600 (this color)
#5183AA
oklch(59.1% 0.081 243.3)
-
Step 700
700
#386588
oklch(49% 0.075 243.7)
-
Step 800
800
#2F536F
oklch(42.8% 0.063 243.5)
-
Step 900
900
#2A4559
oklch(37.8% 0.048 241.7)
-
Step 950
950
#192834
oklch(26.9% 0.03 243.3)
#5183AA 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) | #7283AC | 0.040 |
| Deuteranopia (no green cones) | #667AA9 | 0.033 |
| Tritanopia (no blue cones) | #1F8C90 | 0.067 |
| Achromatopsia (no color) | #7E7E7E | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5183AA
#5183AA
oklch(59.1% 0.081 243.3)
- #A07349
#A07349
oklch(59.2% 0.081 63.2)
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 #5183AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.009
- Dusty Blue #5A86AD ΔE 0.014
- Steel Blue #4682B4 ΔE 0.019
- Cool Blue #4984B8 ΔE 0.022
- Stormy Blue #507B9C ΔE 0.028
- Cerulean #457B9D ΔE 0.032
- Blue NCS #118AB2 ΔE 0.040
- Faded Blue #658CBB ΔE 0.042
Use #5183AA 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.