#3681BA
Closest named color: Steel Blue (#4682B4). oklch(58.3% 0.115 244.7), rgb(54, 129, 186).
Aa
Black text reads best on this color (5.00:1).
About this color
#3681BA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.115 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.016 away. Black text reads best on it, at 5.00:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 5.00:1 |
| White text | 4.19:1 |
Values
| HEX | #3681BA |
| RGB | rgb(54, 129, 186) |
| HSL | hsl(206, 55%, 47%) |
| OKLCH | oklch(58.3% 0.115 244.7) |
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 #3681BA | 4.19:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #3681BA | 5.00:1 | AA | Lc 35.5 | Non-text elements, placeholder text |
| #3681BA text on white | 4.19:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #3681BA text on black | 5.00:1 | AA | Lc -33.0 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEB
oklch(88.6% 0.028 243.1)
-
Step 300
300
#A5C5E0
oklch(80.9% 0.052 243.9)
-
Step 400
400
#74A6D1
oklch(70.6% 0.083 245.3)
-
Step 500
500
#4D90C5
oklch(63.2% 0.105 244.5)
-
Step 600
600 (this color)
#3681BA
oklch(58.3% 0.115 244.7)
-
Step 700
700
#1F6699
oklch(49.2% 0.107 244.6)
-
Step 800
800
#1C537C
oklch(42.7% 0.089 244.9)
-
Step 900
900
#1E4563
oklch(37.7% 0.068 244.3)
-
Step 950
950
#12293A
oklch(27.1% 0.043 242.6)
#3681BA 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) | #6783BC | 0.050 |
| Deuteranopia (no green cones) | #5576B9 | 0.038 |
| Tritanopia (no blue cones) | #008F95 | 0.083 |
| Achromatopsia (no color) | #7C7C7C | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3681BA
#3681BA
oklch(58.3% 0.115 244.7)
- #A96B24
#A96B24
oklch(58.3% 0.115 65)
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 #3681BA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.016
- Cool Blue #4984B8 ΔE 0.019
- Windows Blue #3778BF ΔE 0.028
- Water Blue #0E87CC ΔE 0.031
- Nice Blue #107AB0 ΔE 0.033
- Blue NCS #118AB2 ΔE 0.034
- Off Blue #5684AE ΔE 0.036
- Flat Blue #3C73A8 ΔE 0.043
Use #3681BA 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.