#3689C4
Closest named color: Water Blue (#0E87CC). oklch(60.7% 0.12 243.4), rgb(54, 137, 196).
Aa
Black text reads best on this color (5.53:1).
About this color
#3689C4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.120 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.022 away. Black text reads best on it, at 5.53:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.53:1 |
| White text | 3.79:1 |
Values
| HEX | #3689C4 |
| RGB | rgb(54, 137, 196) |
| HSL | hsl(205, 57%, 49%) |
| OKLCH | oklch(60.7% 0.12 243.4) |
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 #3689C4 | 3.79:1 | AA large text | Lc -70.7 | Content text, not long reading |
| Black text on #3689C4 | 5.53:1 | AA | Lc 38.9 | Non-text elements, placeholder text |
| #3689C4 text on white | 3.79:1 | AA large text | Lc 65.2 | Content text, not long reading |
| #3689C4 text on black | 5.53:1 | AA | Lc -36.5 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCED
oklch(88.5% 0.032 243.7)
-
Step 300
300
#A1C6E4
oklch(81% 0.058 243)
-
Step 400
400
#6BA7D7
oklch(70.6% 0.094 243.8)
-
Step 500
500 (this color)
#3689C4
oklch(60.7% 0.12 243.4)
-
Step 600
600
#117AB9
oklch(55.7% 0.13 243.2)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#085381
oklch(42.6% 0.101 243.7)
-
Step 900
900
#144568
oklch(37.6% 0.079 244.1)
-
Step 950
950
#0E293D
oklch(27.1% 0.05 243.6)
#3689C4 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) | #6E8AC7 | 0.055 |
| Deuteranopia (no green cones) | #5A7DC3 | 0.042 |
| Tritanopia (no blue cones) | #00979E | 0.083 |
| Achromatopsia (no color) | #838383 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3689C4
#3689C4
oklch(60.7% 0.12 243.4)
- #B47028
#B47028
oklch(60.6% 0.12 62.9)
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 #3689C4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.022
- Cool Blue #4984B8 ΔE 0.023
- Steel Blue #4682B4 ΔE 0.028
- Blue NCS #118AB2 ΔE 0.035
- Off Blue #5684AE ΔE 0.040
- Dusty Blue #5A86AD ΔE 0.043
- Faded Blue #658CBB ΔE 0.047
- Windows Blue #3778BF ΔE 0.047
Use #3689C4 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.