#436BC1
Closest named color: French Blue (#436BAD). oklch(54.2% 0.142 263.6), rgb(67, 107, 193).
Aa
White text reads best on this color (5.10:1).
About this color
#436BC1 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.142 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.032 away. White text reads best on it, at 5.10:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.11:1 |
| White text | 5.10:1 |
Values
| HEX | #436BC1 |
| RGB | rgb(67, 107, 193) |
| HSL | hsl(221, 50%, 51%) |
| OKLCH | oklch(54.2% 0.142 263.6) |
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 #436BC1 | 5.10:1 | AA | Lc -80.3 | Fine for body text |
| Black text on #436BC1 | 4.11:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #436BC1 text on white | 5.10:1 | AA | Lc 75.0 | Content text, not long reading |
| #436BC1 text on black | 4.11:1 | AA large text | Lc -26.8 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDDAF1
oklch(88.6% 0.035 262)
-
Step 300
300
#ACC1EB
oklch(80.9% 0.064 264.1)
-
Step 400
400
#80A0E1
oklch(70.8% 0.102 263.9)
-
Step 500
500
#6087D8
oklch(63.1% 0.13 263.6)
-
Step 600
600 (this color)
#436BC1
oklch(54.2% 0.142 263.6)
-
Step 700
700
#385CAB
oklch(49% 0.133 263.8)
-
Step 800
800
#2F4C8A
oklch(42.7% 0.109 263.6)
-
Step 900
900
#2A406E
oklch(37.8% 0.084 263.6)
-
Step 950
950
#182641
oklch(27.1% 0.054 262.5)
#436BC1 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) | #4274C4 | 0.024 |
| Deuteranopia (no green cones) | #2C69BF | 0.022 |
| Tritanopia (no blue cones) | #007F8C | 0.119 |
| Achromatopsia (no color) | #6E6E6E | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436BC1
#436BC1
oklch(54.2% 0.142 263.6)
- #8E6800
#8E6800
oklch(54.2% 0.111 83.3)
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 #436BC1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.032
- Mid Blue #276AB3 ΔE 0.034
- Windows Blue #3778BF ΔE 0.036
- Flat Blue #3C73A8 ΔE 0.050
- Royal Blue #4169E1 ΔE 0.050
- Dark Periwinkle #665FD1 ΔE 0.058
- Iris #6258C4 ΔE 0.059
- Nice Blue #107AB0 ΔE 0.060
Use #436BC1 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.