#436CB8
Closest named color: French Blue (#436BAD). oklch(53.9% 0.128 261.7), rgb(67, 108, 184).
Aa
White text reads best on this color (5.15:1).
About this color
#436CB8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.128 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.017 away. White text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.07:1 |
| White text | 5.15:1 |
Values
| HEX | #436CB8 |
| RGB | rgb(67, 108, 184) |
| HSL | hsl(219, 47%, 49%) |
| OKLCH | oklch(53.9% 0.128 261.7) |
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 #436CB8 | 5.15:1 | AA | Lc -80.6 | Fine for body text |
| Black text on #436CB8 | 4.07:1 | AA large text | Lc 28.8 | Dividers and decoration only |
| #436CB8 text on white | 5.15:1 | AA | Lc 75.3 | Fine for body text |
| #436CB8 text on black | 4.07:1 | AA large text | Lc -26.5 | 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
#CEDAEF
oklch(88.6% 0.032 261.7)
-
Step 300
300
#ACC1E7
oklch(80.8% 0.059 262.3)
-
Step 400
400
#81A1DA
oklch(70.7% 0.091 261.7)
-
Step 500
500
#6189D1
oklch(63.2% 0.118 261.5)
-
Step 600
600 (this color)
#436CB8
oklch(53.9% 0.128 261.7)
-
Step 700
700
#395EA4
oklch(49% 0.12 261.9)
-
Step 800
800
#304D85
oklch(42.7% 0.1 262.3)
-
Step 900
900
#2A416A
oklch(37.7% 0.076 261.3)
-
Step 950
950
#19263E
oklch(27% 0.049 262)
#436CB8 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) | #4A73BB | 0.022 |
| Deuteranopia (no green cones) | #3968B6 | 0.016 |
| Tritanopia (no blue cones) | #007D89 | 0.107 |
| Achromatopsia (no color) | #6D6D6D | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436CB8
#436CB8
oklch(53.9% 0.128 261.7)
- #8E6600
#8E6600
oklch(53.7% 0.111 81.6)
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 #436CB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.017
- Mid Blue #276AB3 ΔE 0.027
- Windows Blue #3778BF ΔE 0.033
- Flat Blue #3C73A8 ΔE 0.036
- Muted Blue #3B719F ΔE 0.046
- Nice Blue #107AB0 ΔE 0.051
- Dull Blue #49759C ΔE 0.057
- Dusky Blue #475F94 ΔE 0.061
Use #436CB8 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.