#3685CD
Closest named color: Water Blue (#0E87CC). oklch(60.2% 0.134 249.3), rgb(54, 133, 205).
Aa
Black text reads best on this color (5.39:1).
About this color
#3685CD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.134 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.017 away. Black text reads best on it, at 5.39:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.39:1 |
| White text | 3.89:1 |
Values
| HEX | #3685CD |
| RGB | rgb(54, 133, 205) |
| HSL | hsl(209, 60%, 51%) |
| OKLCH | oklch(60.2% 0.134 249.3) |
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 #3685CD | 3.89:1 | AA large text | Lc -71.5 | Content text, not long reading |
| Black text on #3685CD | 5.39:1 | AA | Lc 38.0 | Non-text elements, placeholder text |
| #3685CD text on white | 3.89:1 | AA large text | Lc 66.0 | Content text, not long reading |
| #3685CD text on black | 5.39:1 | AA | Lc -35.6 | 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 500.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C7DCF1
oklch(88.5% 0.037 248.2)
-
Step 300
300
#A1C5EA
oklch(81% 0.065 249.3)
-
Step 400
400
#6BA6DF
oklch(70.8% 0.104 248.7)
-
Step 500
500 (this color)
#3685CD
oklch(60.2% 0.134 249.3)
-
Step 600
600
#1676C4
oklch(55.5% 0.146 249.5)
-
Step 700
700
#0363A9
oklch(49.1% 0.135 249.4)
-
Step 800
800
#0C5189
oklch(42.6% 0.112 249.5)
-
Step 900
900
#15446E
oklch(37.8% 0.088 249.3)
-
Step 950
950
#0E2840
oklch(27% 0.055 249)
#3685CD 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) | #6489D0 | 0.046 |
| Deuteranopia (no green cones) | #4E7BCC | 0.031 |
| Tritanopia (no blue cones) | #00969F | 0.099 |
| Achromatopsia (no color) | #818181 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3685CD
#3685CD
oklch(60.2% 0.134 249.3)
- #B27000
#B27000
oklch(60.2% 0.131 69.4)
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 #3685CD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.017
- Cool Blue #4984B8 ΔE 0.034
- Steel Blue #4682B4 ΔE 0.038
- Windows Blue #3778BF ΔE 0.039
- Dark Sky Blue #448EE4 ΔE 0.043
- Blue NCS #118AB2 ΔE 0.051
- Off Blue #5684AE ΔE 0.052
- Nice Blue #107AB0 ΔE 0.057
Use #3685CD 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.