#436BD1
Closest named color: Royal Blue (#4169E1). oklch(55.3% 0.164 265.3), rgb(67, 107, 209).
Aa
White text reads best on this color (4.92:1).
About this color
#436BD1 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.164 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.026 away. White text reads best on it, at 4.92:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.164) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.26:1 |
| White text | 4.92:1 |
Values
| HEX | #436BD1 |
| RGB | rgb(67, 107, 209) |
| HSL | hsl(223, 61%, 54%) |
| OKLCH | oklch(55.3% 0.164 265.3) |
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 #436BD1 | 4.92:1 | AA | Lc -79.2 | Fine for body text |
| Black text on #436BD1 | 4.26:1 | AA large text | Lc 30.3 | Non-text elements, placeholder text |
| #436BD1 text on white | 4.92:1 | AA | Lc 73.8 | Content text, not long reading |
| #436BD1 text on black | 4.26:1 | AA large text | Lc -27.9 | 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
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F5
oklch(88.4% 0.041 265.7)
-
Step 300
300
#AAC0F1
oklch(80.8% 0.074 265.9)
-
Step 400
400
#7D9EEA
oklch(70.6% 0.118 265.6)
-
Step 500
500
#5D84E4
oklch(63% 0.151 265.6)
-
Step 600
600 (this color)
#436BD1
oklch(55.3% 0.164 265.3)
-
Step 700
700
#3659B6
oklch(49% 0.153 265.5)
-
Step 800
800
#2D4A93
oklch(42.8% 0.125 265.2)
-
Step 900
900
#283E75
oklch(37.6% 0.098 265.5)
-
Step 950
950
#172545
oklch(27% 0.063 264.7)
#436BD1 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) | #3377D5 | 0.031 |
| Deuteranopia (no green cones) | #066ACF | 0.037 |
| Tritanopia (no blue cones) | #008394 | 0.134 |
| Achromatopsia (no color) | #707070 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436BD1
#436BD1
oklch(55.3% 0.164 265.3)
- #906C00
#906C00
oklch(55.2% 0.113 85.4)
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 #436BD1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.026
- Windows Blue #3778BF ΔE 0.049
- Dark Periwinkle #665FD1 ΔE 0.049
- Warm Blue #4B57DB ΔE 0.051
- Neon Blue #4361EE ΔE 0.052
- Cerulean Blue #056EEE ΔE 0.053
- Mid Blue #276AB3 ΔE 0.054
- French Blue #436BAD ΔE 0.057
Use #436BD1 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.