#3685AB
Closest named color: Blue NCS (#118AB2). oklch(58.5% 0.096 232.7), rgb(54, 133, 171).
Aa
Black text reads best on this color (5.09:1).
About this color
#3685AB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.096 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.020 away. Black text reads best on it, at 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.09:1 |
| White text | 4.11:1 |
Values
| HEX | #3685AB |
| RGB | rgb(54, 133, 171) |
| HSL | hsl(199, 52%, 44%) |
| OKLCH | oklch(58.5% 0.096 232.7) |
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 #3685AB | 4.11:1 | AA large text | Lc -73.5 | Content text, not long reading |
| Black text on #3685AB | 5.09:1 | AA | Lc 36.0 | Non-text elements, placeholder text |
| #3685AB text on white | 4.11:1 | AA large text | Lc 68.0 | Content text, not long reading |
| #3685AB text on black | 5.09:1 | AA | Lc -33.6 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CADCE7
oklch(88.4% 0.025 234.5)
-
Step 300
300
#A6C6D8
oklch(80.9% 0.043 232.7)
-
Step 400
400
#74A9C5
oklch(70.8% 0.069 232.1)
-
Step 500
500
#4D93B6
oklch(63.2% 0.088 232.2)
-
Step 600
600 (this color)
#3685AB
oklch(58.5% 0.096 232.7)
-
Step 700
700
#1D698B
oklch(49.2% 0.089 232.6)
-
Step 800
800
#1B5571
oklch(42.6% 0.075 233.6)
-
Step 900
900
#1E475B
oklch(37.8% 0.057 232.2)
-
Step 950
950
#122935
oklch(26.8% 0.037 233.2)
#3685AB 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) | #7284AD | 0.062 |
| Deuteranopia (no green cones) | #6278AA | 0.053 |
| Tritanopia (no blue cones) | #008F92 | 0.060 |
| Achromatopsia (no color) | #7D7D7D | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3685AB
#3685AB
oklch(58.5% 0.096 232.7)
- #A86B43
#A86B43
oklch(58.5% 0.096 53.1)
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 #3685AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.020
- Steel Blue #4682B4 ΔE 0.023
- Cool Blue #4984B8 ΔE 0.028
- Off Blue #5684AE ΔE 0.029
- Cerulean #457B9D ΔE 0.031
- Teal Blue #01889F ΔE 0.032
- Dusty Blue #5A86AD ΔE 0.034
- Stormy Blue #507B9C ΔE 0.035
Use #3685AB 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.