#3F85A5
Closest named color: Off Blue (#5684AE). oklch(58.5% 0.085 230.4), rgb(63, 133, 165).
Aa
Black text reads best on this color (5.10:1).
About this color
#3F85A5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.085 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.028 away. Black text reads best on it, at 5.10:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.10:1 |
| White text | 4.10:1 |
Values
| HEX | #3F85A5 |
| RGB | rgb(63, 133, 165) |
| HSL | hsl(199, 45%, 45%) |
| OKLCH | oklch(58.5% 0.085 230.4) |
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 #3F85A5 | 4.10:1 | AA large text | Lc -73.5 | Content text, not long reading |
| Black text on #3F85A5 | 5.10:1 | AA | Lc 36.1 | Non-text elements, placeholder text |
| #3F85A5 text on white | 4.10:1 | AA large text | Lc 68.0 | Content text, not long reading |
| #3F85A5 text on black | 5.10:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CCDCE5
oklch(88.5% 0.021 232.2)
-
Step 300
300
#A8C6D5
oklch(80.9% 0.039 229.5)
-
Step 400
400
#79A8C0
oklch(70.7% 0.061 230.9)
-
Step 500
500
#5492B0
oklch(63% 0.078 230.8)
-
Step 600
600 (this color)
#3F85A5
oklch(58.5% 0.085 230.4)
-
Step 700
700
#276985
oklch(49.2% 0.079 229.7)
-
Step 800
800
#22556C
oklch(42.6% 0.066 230.6)
-
Step 900
900
#224758
oklch(37.8% 0.051 230)
-
Step 950
950
#152933
oklch(26.9% 0.032 231.4)
#3F85A5 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) | #7583A7 | 0.060 |
| Deuteranopia (no green cones) | #6778A5 | 0.053 |
| Tritanopia (no blue cones) | #008E8F | 0.057 |
| Achromatopsia (no color) | #7D7D7D | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F85A5
#3F85A5
oklch(58.5% 0.085 230.4)
- #A56C4C
#A56C4C
oklch(58.5% 0.086 49.7)
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 #3F85A5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.028
- Blue NCS #118AB2 ΔE 0.028
- Steel Blue #4682B4 ΔE 0.028
- Cerulean #457B9D ΔE 0.028
- Stormy Blue #507B9C ΔE 0.030
- Dusty Blue #5A86AD ΔE 0.030
- Teal Blue #01889F ΔE 0.031
- Cool Blue #4984B8 ΔE 0.033
Use #3F85A5 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.