#436BC4
Closest named color: French Blue (#436BAD). oklch(54.4% 0.146 264), rgb(67, 107, 196).
Aa
White text reads best on this color (5.07:1).
About this color
#436BC4 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.146 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.036 away. White text reads best on it, at 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.13:1 |
| White text | 5.07:1 |
Values
| HEX | #436BC4 |
| RGB | rgb(67, 107, 196) |
| HSL | hsl(221, 52%, 52%) |
| OKLCH | oklch(54.4% 0.146 264) |
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 #436BC4 | 5.07:1 | AA | Lc -80.1 | Fine for body text |
| Black text on #436BC4 | 4.13:1 | AA large text | Lc 29.3 | Dividers and decoration only |
| #436BC4 text on white | 5.07:1 | AA | Lc 74.7 | Content text, not long reading |
| #436BC4 text on black | 4.13:1 | AA large text | Lc -27.0 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CDDAF2
oklch(88.6% 0.036 262.8)
-
Step 300
300
#ABC1EC
oklch(80.9% 0.066 263.7)
-
Step 400
400
#7FA0E2
oklch(70.7% 0.104 263.6)
-
Step 500
500
#5F86DA
oklch(63% 0.134 264.1)
-
Step 600
600 (this color)
#436BC4
oklch(54.4% 0.146 264)
-
Step 700
700
#385CAD
oklch(49.1% 0.136 264)
-
Step 800
800
#2E4B8C
oklch(42.6% 0.113 264.1)
-
Step 900
900
#293F70
oklch(37.6% 0.089 264.3)
-
Step 950
950
#182541
oklch(26.8% 0.055 264.2)
#436BC4 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) | #3F75C7 | 0.026 |
| Deuteranopia (no green cones) | #2869C2 | 0.025 |
| Tritanopia (no blue cones) | #007F8E | 0.120 |
| Achromatopsia (no color) | #6E6E6E | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436BC4
#436BC4
oklch(54.4% 0.146 264)
- #8E6900
#8E6900
oklch(54.4% 0.112 84.2)
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 #436BC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.036
- Mid Blue #276AB3 ΔE 0.038
- Windows Blue #3778BF ΔE 0.038
- Royal Blue #4169E1 ΔE 0.046
- Flat Blue #3C73A8 ΔE 0.054
- Dark Periwinkle #665FD1 ΔE 0.056
- Iris #6258C4 ΔE 0.058
- Warm Blue #4B57DB ΔE 0.063
Use #436BC4 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.