#436AC8
Closest named color: Royal Blue (#4169E1). oklch(54.5% 0.153 264.8), rgb(67, 106, 200).
Aa
White text reads best on this color (5.07:1).
About this color
#436AC8 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.153 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.039 away. White text reads best on it, at 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.13:1 |
| White text | 5.07:1 |
Values
| HEX | #436AC8 |
| RGB | rgb(67, 106, 200) |
| HSL | hsl(222, 55%, 52%) |
| OKLCH | oklch(54.5% 0.153 264.8) |
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 #436AC8 | 5.07:1 | AA | Lc -80.2 | Fine for body text |
| Black text on #436AC8 | 4.13:1 | AA large text | Lc 29.3 | Dividers and decoration only |
| #436AC8 text on white | 5.07:1 | AA | Lc 74.8 | Content text, not long reading |
| #436AC8 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
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CDD9F3
oklch(88.4% 0.038 265.8)
-
Step 300
300
#ABC1EE
oklch(81% 0.068 264.5)
-
Step 400
400
#7F9FE5
oklch(70.7% 0.109 265)
-
Step 500
500
#5F86DE
oklch(63.2% 0.14 264.7)
-
Step 600
600 (this color)
#436AC8
oklch(54.5% 0.153 264.8)
-
Step 700
700
#385BB0
oklch(49.1% 0.141 264.8)
-
Step 800
800
#2E4B8F
oklch(42.8% 0.118 264.6)
-
Step 900
900
#293F72
oklch(37.7% 0.092 264.8)
-
Step 950
950
#182543
oklch(27% 0.059 265)
#436AC8 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) | #3A75CB | 0.029 |
| Deuteranopia (no green cones) | #1E69C6 | 0.030 |
| Tritanopia (no blue cones) | #00808F | 0.127 |
| Achromatopsia (no color) | #6E6E6E | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436AC8
#436AC8
oklch(54.5% 0.153 264.8)
- #8E6A00
#8E6A00
oklch(54.6% 0.112 85)
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 #436AC8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.039
- Mid Blue #276AB3 ΔE 0.042
- Windows Blue #3778BF ΔE 0.043
- French Blue #436BAD ΔE 0.043
- Dark Periwinkle #665FD1 ΔE 0.052
- Iris #6258C4 ΔE 0.055
- Warm Blue #4B57DB ΔE 0.057
- Flat Blue #3C73A8 ΔE 0.061
Use #436AC8 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.