#436CC7
Closest named color: Windows Blue (#3778BF). oklch(54.9% 0.149 263.9), rgb(67, 108, 199).
Aa
White text reads best on this color (4.99:1).
About this color
#436CC7 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.149 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.037 away. White text reads best on it, at 4.99:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.20:1 |
| White text | 4.99:1 |
Values
| HEX | #436CC7 |
| RGB | rgb(67, 108, 199) |
| HSL | hsl(221, 54%, 52%) |
| OKLCH | oklch(54.9% 0.149 263.9) |
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 #436CC7 | 4.99:1 | AA | Lc -79.6 | Fine for body text |
| Black text on #436CC7 | 4.20:1 | AA large text | Lc 29.9 | Dividers and decoration only |
| #436CC7 text on white | 4.99:1 | AA | Lc 74.2 | Content text, not long reading |
| #436CC7 text on black | 4.20:1 | AA large text | Lc -27.5 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CDDAF3
oklch(88.6% 0.037 263.6)
-
Step 300
300
#ABC1ED
oklch(80.9% 0.067 264.1)
-
Step 400
400
#7EA0E4
oklch(70.8% 0.107 263.5)
-
Step 500
500
#5E86DC
oklch(63% 0.137 264)
-
Step 600
600 (this color)
#436CC7
oklch(54.9% 0.149 263.9)
-
Step 700
700
#375CAE
oklch(49.2% 0.138 263.8)
-
Step 800
800
#2E4B8D
oklch(42.6% 0.115 264.3)
-
Step 900
900
#293F71
oklch(37.7% 0.09 264.6)
-
Step 950
950
#182542
oklch(26.9% 0.057 264.6)
#436CC7 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) | #3F76CA | 0.026 |
| Deuteranopia (no green cones) | #266AC5 | 0.026 |
| Tritanopia (no blue cones) | #008190 | 0.122 |
| Achromatopsia (no color) | #6F6F6F | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436CC7
#436CC7
oklch(54.9% 0.149 263.9)
- #906A00
#906A00
oklch(54.8% 0.113 83.7)
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 #436CC7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.037
- French Blue #436BAD ΔE 0.041
- Mid Blue #276AB3 ΔE 0.041
- Royal Blue #4169E1 ΔE 0.042
- Dark Periwinkle #665FD1 ΔE 0.055
- Flat Blue #3C73A8 ΔE 0.057
- Iris #6258C4 ΔE 0.059
- Warm Blue #4B57DB ΔE 0.062
Use #436CC7 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.