#436BBB
Closest named color: French Blue (#436BAD). oklch(53.9% 0.133 262.7), rgb(67, 107, 187).
Aa
White text reads best on this color (5.17:1).
About this color
#436BBB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.133 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.022 away. White text reads best on it, at 5.17:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.05:1 |
| White text | 5.17:1 |
Values
| HEX | #436BBB |
| RGB | rgb(67, 107, 187) |
| HSL | hsl(220, 47%, 50%) |
| OKLCH | oklch(53.9% 0.133 262.7) |
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 #436BBB | 5.17:1 | AA | Lc -80.8 | Fine for body text |
| Black text on #436BBB | 4.05:1 | AA large text | Lc 28.7 | Dividers and decoration only |
| #436BBB text on white | 5.17:1 | AA | Lc 75.4 | Fine for body text |
| #436BBB text on black | 4.05:1 | AA large text | Lc -26.3 | 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
#CEDAF0
oklch(88.6% 0.033 262.7)
-
Step 300
300
#ACC1E8
oklch(80.8% 0.06 262.8)
-
Step 400
400
#81A0DD
oklch(70.6% 0.096 263.4)
-
Step 500
500
#6188D4
oklch(63.2% 0.123 262.7)
-
Step 600
600 (this color)
#436BBB
oklch(53.9% 0.133 262.7)
-
Step 700
700
#395EA6
oklch(49.2% 0.123 262.3)
-
Step 800
800
#304D87
oklch(42.8% 0.103 262.8)
-
Step 900
900
#2A406C
oklch(37.6% 0.081 263)
-
Step 950
950
#19263F
oklch(27% 0.05 262.6)
#436BBB 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) | #4673BE | 0.023 |
| Deuteranopia (no green cones) | #3468B9 | 0.018 |
| Tritanopia (no blue cones) | #007D8A | 0.111 |
| Achromatopsia (no color) | #6D6D6D | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436BBB
#436BBB
oklch(53.9% 0.133 262.7)
- #8D6700
#8D6700
oklch(53.8% 0.111 83.1)
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 #436BBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.022
- Mid Blue #276AB3 ΔE 0.028
- Windows Blue #3778BF ΔE 0.035
- Flat Blue #3C73A8 ΔE 0.042
- Muted Blue #3B719F ΔE 0.052
- Nice Blue #107AB0 ΔE 0.055
- Royal Blue #4169E1 ΔE 0.060
- Iris #6258C4 ΔE 0.062
Use #436BBB 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.