#436CB3
Closest named color: French Blue (#436BAD). oklch(53.6% 0.121 260.7), rgb(67, 108, 179).
Aa
White text reads best on this color (5.20:1).
About this color
#436CB3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.121 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.009 away. White text reads best on it, at 5.20:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.03:1 |
| White text | 5.20:1 |
Values
| HEX | #436CB3 |
| RGB | rgb(67, 108, 179) |
| HSL | hsl(218, 46%, 48%) |
| OKLCH | oklch(53.6% 0.121 260.7) |
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 #436CB3 | 5.20:1 | AA | Lc -81.0 | Fine for body text |
| Black text on #436CB3 | 4.03:1 | AA large text | Lc 28.5 | Dividers and decoration only |
| #436CB3 text on white | 5.20:1 | AA | Lc 75.6 | Fine for body text |
| #436CB3 text on black | 4.03:1 | AA large text | Lc -26.1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
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
#ADC2E5
oklch(81% 0.055 260.6)
-
Step 400
400
#81A1D7
oklch(70.6% 0.087 260.7)
-
Step 500
500
#6289CD
oklch(63.1% 0.112 261)
-
Step 600
600 (this color)
#436CB3
oklch(53.6% 0.121 260.7)
-
Step 700
700
#3A5FA0
oklch(49% 0.113 260.9)
-
Step 800
800
#304E82
oklch(42.7% 0.094 260.7)
-
Step 900
900
#2B4168
oklch(37.7% 0.073 261.2)
-
Step 950
950
#19263D
oklch(26.9% 0.047 261.3)
#436CB3 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) | #4D72B6 | 0.021 |
| Deuteranopia (no green cones) | #3D68B2 | 0.014 |
| Tritanopia (no blue cones) | #007C87 | 0.102 |
| Achromatopsia (no color) | #6D6D6D | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436CB3
#436CB3
oklch(53.6% 0.121 260.7)
- #8E6500
#8E6500
oklch(53.5% 0.111 80.7)
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 #436CB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.009
- Mid Blue #276AB3 ΔE 0.026
- Flat Blue #3C73A8 ΔE 0.030
- Windows Blue #3778BF ΔE 0.035
- Muted Blue #3B719F ΔE 0.039
- Nice Blue #107AB0 ΔE 0.048
- Dull Blue #49759C ΔE 0.050
- Dusky Blue #475F94 ΔE 0.055
Use #436CB3 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.