#3B6DB1
Closest named color: French Blue (#436BAD). oklch(53.3% 0.12 256.6), rgb(59, 109, 177).
Aa
White text reads best on this color (5.23:1).
About this color
#3B6DB1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.120 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.010 away. White text reads best on it, at 5.23:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.00:1 |
| White text | 5.23:1 |
Values
| HEX | #3B6DB1 |
| RGB | rgb(59, 109, 177) |
| HSL | hsl(215, 50%, 46%) |
| OKLCH | oklch(53.3% 0.12 256.6) |
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 #3B6DB1 | 5.23:1 | AA | Lc -81.1 | Fine for body text |
| Black text on #3B6DB1 | 4.00:1 | AA large text | Lc 28.3 | Dividers and decoration only |
| #3B6DB1 text on white | 5.23:1 | AA | Lc 75.8 | Fine for body text |
| #3B6DB1 text on black | 4.00:1 | AA large text | Lc -26.0 | Dividers and decoration only |
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
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAED
oklch(88.4% 0.03 257.8)
-
Step 300
300
#ABC3E4
oklch(81% 0.054 256.4)
-
Step 400
400
#7DA3D6
oklch(70.7% 0.086 255.9)
-
Step 500
500
#5C8BCC
oklch(63.1% 0.111 256.7)
-
Step 600
600 (this color)
#3B6DB1
oklch(53.3% 0.12 256.6)
-
Step 700
700
#33619F
oklch(49.1% 0.112 256.5)
-
Step 800
800
#2B4F81
oklch(42.6% 0.093 257)
-
Step 900
900
#274267
oklch(37.6% 0.072 256.6)
-
Step 950
950
#17273D
oklch(27% 0.047 256.6)
#3B6DB1 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) | #4F72B4 | 0.027 |
| Deuteranopia (no green cones) | #3E67B0 | 0.016 |
| Tritanopia (no blue cones) | #007D86 | 0.098 |
| Achromatopsia (no color) | #6C6C6C | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B6DB1
#3B6DB1
oklch(53.3% 0.12 256.6)
- #916200
#916200
oklch(53.3% 0.112 76.1)
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 #3B6DB1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.010
- Mid Blue #276AB3 ΔE 0.020
- Flat Blue #3C73A8 ΔE 0.025
- Muted Blue #3B719F ΔE 0.033
- Windows Blue #3778BF ΔE 0.034
- Nice Blue #107AB0 ΔE 0.041
- Dull Blue #49759C ΔE 0.047
- Ocean Blue #03719C ΔE 0.049
Use #3B6DB1 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.