#436AB3
Closest named color: French Blue (#436BAD). oklch(53.1% 0.123 261.9), rgb(67, 106, 179).
Aa
White text reads best on this color (5.31:1).
About this color
#436AB3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.123 and its hue 262°. 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 5.31:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.95:1 |
| White text | 5.31:1 |
Values
| HEX | #436AB3 |
| RGB | rgb(67, 106, 179) |
| HSL | hsl(219, 46%, 48%) |
| OKLCH | oklch(53.1% 0.123 261.9) |
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 #436AB3 | 5.31:1 | AA | Lc -81.6 | Fine for body text |
| Black text on #436AB3 | 3.95:1 | AA large text | Lc 27.8 | Dividers and decoration only |
| #436AB3 text on white | 5.31:1 | AA | Lc 76.2 | Fine for body text |
| #436AB3 text on black | 3.95:1 | AA large text | Lc -25.5 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAEE
oklch(88.5% 0.03 260.7)
-
Step 300
300
#ADC1E5
oklch(80.8% 0.056 262.2)
-
Step 400
400
#82A1D8
oklch(70.7% 0.088 261.6)
-
Step 500
500
#6389CE
oklch(63.2% 0.113 261.7)
-
Step 600
600 (this color)
#436AB3
oklch(53.1% 0.123 261.9)
-
Step 700
700
#3B5FA1
oklch(49.2% 0.114 261.5)
-
Step 800
800
#314E83
oklch(42.8% 0.095 261.6)
-
Step 900
900
#2B4169
oklch(37.7% 0.074 261.6)
-
Step 950
950
#1A263D
oklch(27% 0.046 262.7)
#436AB3 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) | #4A71B6 | 0.022 |
| Deuteranopia (no green cones) | #3A66B1 | 0.016 |
| Tritanopia (no blue cones) | #007A86 | 0.103 |
| Achromatopsia (no color) | #6B6B6B | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436AB3
#436AB3
oklch(53.1% 0.123 261.9)
- #8C6500
#8C6500
oklch(53.3% 0.11 82)
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 #436AB3, 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 0.024
- Flat Blue #3C73A8 ΔE 0.034
- Windows Blue #3778BF ΔE 0.039
- Muted Blue #3B719F ΔE 0.042
- Nice Blue #107AB0 ΔE 0.052
- Dusky Blue #475F94 ΔE 0.053
- Dull Blue #49759C ΔE 0.054
Use #436AB3 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.