#436AB1
Closest named color: French Blue (#436BAD). oklch(53% 0.121 261.5), rgb(67, 106, 177).
Aa
White text reads best on this color (5.33:1).
About this color
#436AB1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, 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 0.007 away. White text reads best on it, at 5.33:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.93:1 |
| White text | 5.33:1 |
Values
| HEX | #436AB1 |
| RGB | rgb(67, 106, 177) |
| HSL | hsl(219, 45%, 48%) |
| OKLCH | oklch(53% 0.121 261.5) |
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 #436AB1 | 5.33:1 | AA | Lc -81.7 | Fine for body text |
| Black text on #436AB1 | 3.93:1 | AA large text | Lc 27.7 | Dividers and decoration only |
| #436AB1 text on white | 5.33:1 | AA | Lc 76.4 | Fine for body text |
| #436AB1 text on black | 3.93:1 | AA large text | Lc -25.4 | 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
#ADC2E4
oklch(81% 0.053 260)
-
Step 400
400
#82A1D7
oklch(70.6% 0.087 261.3)
-
Step 500
500
#6389CC
oklch(63.1% 0.11 261.2)
-
Step 600
600 (this color)
#436AB1
oklch(53% 0.121 261.5)
-
Step 700
700
#3B5FA0
oklch(49.1% 0.113 261.3)
-
Step 800
800
#314E81
oklch(42.7% 0.092 261)
-
Step 900
900
#2B4168
oklch(37.7% 0.073 261.2)
-
Step 950
950
#1A263D
oklch(27% 0.046 262.7)
#436AB1 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) | #4B70B4 | 0.020 |
| Deuteranopia (no green cones) | #3B66B0 | 0.015 |
| Tritanopia (no blue cones) | #007A85 | 0.102 |
| Achromatopsia (no color) | #6B6B6B | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436AB1
#436AB1
oklch(53% 0.121 261.5)
- #8B6400
#8B6400
oklch(53% 0.109 81.8)
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 #436AB1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.007
- Mid Blue #276AB3 ΔE 0.024
- Flat Blue #3C73A8 ΔE 0.032
- Muted Blue #3B719F ΔE 0.039
- Windows Blue #3778BF ΔE 0.040
- Dusky Blue #475F94 ΔE 0.050
- Nice Blue #107AB0 ΔE 0.051
- Dull Blue #49759C ΔE 0.052
Use #436AB1 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.