#436BC7
Closest named color: Windows Blue (#3778BF). oklch(54.6% 0.15 264.3), rgb(67, 107, 199).
Aa
White text reads best on this color (5.04:1).
About this color
#436BC7 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.150 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.040 away. White text reads best on it, at 5.04:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.16:1 |
| White text | 5.04:1 |
Values
| HEX | #436BC7 |
| RGB | rgb(67, 107, 199) |
| HSL | hsl(222, 54%, 52%) |
| OKLCH | oklch(54.6% 0.15 264.3) |
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 #436BC7 | 5.04:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #436BC7 | 4.16:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #436BC7 text on white | 5.04:1 | AA | Lc 74.5 | Content text, not long reading |
| #436BC7 text on black | 4.16:1 | AA large text | Lc -27.2 | 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
#CDD9F3
oklch(88.4% 0.038 265.8)
-
Step 300
300
#ABC1ED
oklch(80.9% 0.067 264.1)
-
Step 400
400
#7F9FE4
oklch(70.6% 0.108 264.7)
-
Step 500
500
#5F86DD
oklch(63.1% 0.138 264.5)
-
Step 600
600 (this color)
#436BC7
oklch(54.6% 0.15 264.3)
-
Step 700
700
#375BAF
oklch(49% 0.14 264.4)
-
Step 800
800
#2E4B8E
oklch(42.7% 0.116 264.4)
-
Step 900
900
#293F71
oklch(37.7% 0.09 264.6)
-
Step 950
950
#182542
oklch(26.9% 0.057 264.6)
#436BC7 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) | #3D75CA | 0.026 |
| Deuteranopia (no green cones) | #2369C5 | 0.028 |
| Tritanopia (no blue cones) | #00808F | 0.124 |
| Achromatopsia (no color) | #6F6F6F | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436BC7
#436BC7
oklch(54.6% 0.15 264.3)
- #8F6A00
#8F6A00
oklch(54.7% 0.112 84.4)
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 #436BC7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.040
- Royal Blue #4169E1 ΔE 0.041
- French Blue #436BAD ΔE 0.041
- Mid Blue #276AB3 ΔE 0.041
- Dark Periwinkle #665FD1 ΔE 0.053
- Iris #6258C4 ΔE 0.057
- Flat Blue #3C73A8 ΔE 0.058
- Warm Blue #4B57DB ΔE 0.060
Use #436BC7 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.