#436AC7
Closest named color: Royal Blue (#4169E1). oklch(54.4% 0.151 264.7), rgb(67, 106, 199).
Aa
White text reads best on this color (5.09:1).
About this color
#436AC7 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.151 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.040 away. White text reads best on it, at 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.12:1 |
| White text | 5.09:1 |
Values
| HEX | #436AC7 |
| RGB | rgb(67, 106, 199) |
| HSL | hsl(222, 54%, 52%) |
| OKLCH | oklch(54.4% 0.151 264.7) |
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 #436AC7 | 5.09:1 | AA | Lc -80.2 | Fine for body text |
| Black text on #436AC7 | 4.12:1 | AA large text | Lc 29.2 | Dividers and decoration only |
| #436AC7 text on white | 5.09:1 | AA | Lc 74.8 | Content text, not long reading |
| #436AC7 text on black | 4.12:1 | AA large text | Lc -26.9 | 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
#5F86DD
oklch(63.1% 0.138 264.5)
-
Step 600
600 (this color)
#436AC7
oklch(54.4% 0.151 264.7)
-
Step 700
700
#385BB0
oklch(49.1% 0.141 264.8)
-
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)
#436AC7 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) | #3B75CA | 0.029 |
| Deuteranopia (no green cones) | #2068C5 | 0.030 |
| Tritanopia (no blue cones) | #00808F | 0.125 |
| Achromatopsia (no color) | #6E6E6E | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436AC7
#436AC7
oklch(54.4% 0.151 264.7)
- #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 #436AC7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.040
- Mid Blue #276AB3 ΔE 0.041
- French Blue #436BAD ΔE 0.042
- Windows Blue #3778BF ΔE 0.042
- Dark Periwinkle #665FD1 ΔE 0.052
- Iris #6258C4 ΔE 0.055
- Warm Blue #4B57DB ΔE 0.058
- Flat Blue #3C73A8 ΔE 0.059
Use #436AC7 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.