#3B6AB3
Closest named color: French Blue (#436BAD). oklch(52.8% 0.126 258.9), rgb(59, 106, 179).
Aa
White text reads best on this color (5.38:1).
About this color
#3B6AB3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.126 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.013 away. White text reads best on it, at 5.38:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.89:1 |
| White text | 5.38:1 |
Values
| HEX | #3B6AB3 |
| RGB | rgb(59, 106, 179) |
| HSL | hsl(217, 50%, 47%) |
| OKLCH | oklch(52.8% 0.126 258.9) |
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 #3B6AB3 | 5.38:1 | AA | Lc -81.9 | Fine for body text |
| Black text on #3B6AB3 | 3.89:1 | AA large text | Lc 27.5 | Dividers and decoration only |
| #3B6AB3 text on white | 5.38:1 | AA | Lc 76.6 | Fine for body text |
| #3B6AB3 text on black | 3.89:1 | AA large text | Lc -25.2 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEF
oklch(88.5% 0.032 260)
-
Step 300
300
#ABC2E6
oklch(80.9% 0.057 259.3)
-
Step 400
400
#7EA2D9
oklch(70.7% 0.09 258.7)
-
Step 500
500
#5D8ACF
oklch(63.1% 0.116 258.7)
-
Step 600
600 (this color)
#3B6AB3
oklch(52.8% 0.126 258.9)
-
Step 700
700
#3560A2
oklch(49.2% 0.117 258.7)
-
Step 800
800
#2C4E84
oklch(42.6% 0.099 259.3)
-
Step 900
900
#284269
oklch(37.8% 0.074 258.3)
-
Step 950
950
#18273E
oklch(27.2% 0.048 258.7)
#3B6AB3 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) | #4970B6 | 0.024 |
| Deuteranopia (no green cones) | #3665B2 | 0.015 |
| Tritanopia (no blue cones) | #007B86 | 0.102 |
| Achromatopsia (no color) | #6A6A6A | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B6AB3
#3B6AB3
oklch(52.8% 0.126 258.9)
- #8D6200
#8D6200
oklch(52.8% 0.11 78.7)
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 #3B6AB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.013
- Mid Blue #276AB3 ΔE 0.016
- Flat Blue #3C73A8 ΔE 0.034
- Windows Blue #3778BF ΔE 0.040
- Muted Blue #3B719F ΔE 0.041
- Nice Blue #107AB0 ΔE 0.049
- Dusky Blue #475F94 ΔE 0.053
- Ocean Blue #03719C ΔE 0.055
Use #3B6AB3 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.