#436BC0
Closest named color: French Blue (#436BAD). oklch(54.2% 0.14 263.5), rgb(67, 107, 192).
Aa
White text reads best on this color (5.11:1).
About this color
#436BC0 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.140 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.030 away. White text reads best on it, at 5.11:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.10:1 |
| White text | 5.11:1 |
Values
| HEX | #436BC0 |
| RGB | rgb(67, 107, 192) |
| HSL | hsl(221, 50%, 51%) |
| OKLCH | oklch(54.2% 0.14 263.5) |
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 #436BC0 | 5.11:1 | AA | Lc -80.4 | Fine for body text |
| Black text on #436BC0 | 4.10:1 | AA large text | Lc 29.0 | Dividers and decoration only |
| #436BC0 text on white | 5.11:1 | AA | Lc 75.0 | Fine for body text |
| #436BC0 text on black | 4.10:1 | AA large text | Lc -26.7 | 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
#ACC1EA
oklch(80.9% 0.063 263.7)
-
Step 400
400
#80A0E0
oklch(70.7% 0.101 263.6)
-
Step 500
500
#6087D7
oklch(63.1% 0.129 263.5)
-
Step 600
600 (this color)
#436BC0
oklch(54.2% 0.14 263.5)
-
Step 700
700
#385DAA
oklch(49.2% 0.13 263.1)
-
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
#192640
oklch(27.1% 0.052 263.2)
#436BC0 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) | #4374C3 | 0.024 |
| Deuteranopia (no green cones) | #2E68BE | 0.022 |
| Tritanopia (no blue cones) | #007E8C | 0.116 |
| Achromatopsia (no color) | #6E6E6E | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436BC0
#436BC0
oklch(54.2% 0.14 263.5)
- #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 #436BC0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.030
- Mid Blue #276AB3 ΔE 0.033
- Windows Blue #3778BF ΔE 0.036
- Flat Blue #3C73A8 ΔE 0.048
- Royal Blue #4169E1 ΔE 0.052
- Iris #6258C4 ΔE 0.059
- Dark Periwinkle #665FD1 ΔE 0.059
- Muted Blue #3B719F ΔE 0.059
Use #436BC0 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.