#436BB9
Closest named color: French Blue (#436BAD). oklch(53.7% 0.131 262.4), rgb(67, 107, 185).
Aa
White text reads best on this color (5.19:1).
About this color
#436BB9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.131 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.019 away. White text reads best on it, at 5.19:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.04:1 |
| White text | 5.19:1 |
Values
| HEX | #436BB9 |
| RGB | rgb(67, 107, 185) |
| HSL | hsl(220, 47%, 49%) |
| OKLCH | oklch(53.7% 0.131 262.4) |
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 #436BB9 | 5.19:1 | AA | Lc -80.9 | Fine for body text |
| Black text on #436BB9 | 4.04:1 | AA large text | Lc 28.6 | Dividers and decoration only |
| #436BB9 text on white | 5.19:1 | AA | Lc 75.5 | Fine for body text |
| #436BB9 text on black | 4.04:1 | AA large text | Lc -26.2 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CEDAEF
oklch(88.6% 0.032 261.7)
-
Step 300
300
#ACC1E7
oklch(80.8% 0.059 262.3)
-
Step 400
400
#81A1DC
oklch(70.8% 0.094 262.3)
-
Step 500
500
#6188D2
oklch(63.1% 0.12 262.3)
-
Step 600
600 (this color)
#436BB9
oklch(53.7% 0.131 262.4)
-
Step 700
700
#3A5EA5
oklch(49.1% 0.121 262.5)
-
Step 800
800
#304D86
oklch(42.7% 0.101 262.6)
-
Step 900
900
#2A406B
oklch(37.6% 0.079 262.7)
-
Step 950
950
#19263F
oklch(27% 0.05 262.6)
#436BB9 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) | #4873BC | 0.023 |
| Deuteranopia (no green cones) | #3668B7 | 0.017 |
| Tritanopia (no blue cones) | #007D89 | 0.110 |
| Achromatopsia (no color) | #6D6D6D | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436BB9
#436BB9
oklch(53.7% 0.131 262.4)
- #8D6600
#8D6600
oklch(53.6% 0.11 82.2)
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 #436BB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.019
- Mid Blue #276AB3 ΔE 0.027
- Windows Blue #3778BF ΔE 0.035
- Flat Blue #3C73A8 ΔE 0.039
- Muted Blue #3B719F ΔE 0.049
- Nice Blue #107AB0 ΔE 0.054
- Dull Blue #49759C ΔE 0.060
- Dusky Blue #475F94 ΔE 0.062
Use #436BB9 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.