#3686CF
Closest named color: Water Blue (#0E87CC). oklch(60.6% 0.136 249.4), rgb(54, 134, 207).
Aa
Black text reads best on this color (5.46:1).
About this color
#3686CF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.136 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.018 away. Black text reads best on it, at 5.46:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.46:1 |
| White text | 3.84:1 |
Values
| HEX | #3686CF |
| RGB | rgb(54, 134, 207) |
| HSL | hsl(209, 61%, 51%) |
| OKLCH | oklch(60.6% 0.136 249.4) |
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 #3686CF | 3.84:1 | AA large text | Lc -71.1 | Content text, not long reading |
| Black text on #3686CF | 5.46:1 | AA | Lc 38.5 | Non-text elements, placeholder text |
| #3686CF text on white | 3.84:1 | AA large text | Lc 65.5 | Content text, not long reading |
| #3686CF text on black | 5.46:1 | AA | Lc -36.1 | 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
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C7DCF1
oklch(88.5% 0.037 248.2)
-
Step 300
300
#A0C5EA
oklch(80.9% 0.066 248.6)
-
Step 400
400
#6BA6E0
oklch(70.8% 0.105 249.1)
-
Step 500
500 (this color)
#3686CF
oklch(60.6% 0.136 249.4)
-
Step 600
600
#1476C5
oklch(55.5% 0.148 249.6)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800
#0A518A
oklch(42.7% 0.114 249.6)
-
Step 900
900
#14446E
oklch(37.8% 0.088 249)
-
Step 950
950
#0E2840
oklch(27% 0.055 249)
#3686CF 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) | #648AD2 | 0.046 |
| Deuteranopia (no green cones) | #4E7CCE | 0.031 |
| Tritanopia (no blue cones) | #0097A1 | 0.099 |
| Achromatopsia (no color) | #828282 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3686CF
#3686CF
oklch(60.6% 0.136 249.4)
- #B47100
#B47100
oklch(60.6% 0.132 69.2)
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 #3686CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.018
- Cool Blue #4984B8 ΔE 0.036
- Dark Sky Blue #448EE4 ΔE 0.039
- Steel Blue #4682B4 ΔE 0.041
- Windows Blue #3778BF ΔE 0.042
- Blue NCS #118AB2 ΔE 0.053
- Off Blue #5684AE ΔE 0.054
- Faded Blue #658CBB ΔE 0.058
Use #3686CF 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.