#436AE3
Closest named color: Royal Blue (#4169E1). oklch(56.4% 0.189 266.7), rgb(67, 106, 227).
Aa
White text reads best on this color (4.76:1).
About this color
#436AE3 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.189 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.005 away. White text reads best on it, at 4.76:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.189) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.40:1 |
| White text | 4.76:1 |
Values
| HEX | #436AE3 |
| RGB | rgb(67, 106, 227) |
| HSL | hsl(225, 74%, 58%) |
| OKLCH | oklch(56.4% 0.189 266.7) |
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 #436AE3 | 4.76:1 | AA | Lc -78.1 | Fine for body text |
| Black text on #436AE3 | 4.40:1 | AA large text | Lc 31.5 | Non-text elements, placeholder text |
| #436AE3 text on white | 4.76:1 | AA | Lc 72.6 | Content text, not long reading |
| #436AE3 text on black | 4.40:1 | AA large text | Lc -29.1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9F9
oklch(88.5% 0.047 266.7)
-
Step 300
300
#A8C0F9
oklch(81% 0.085 266.8)
-
Step 400
400
#7A9DF5
oklch(70.8% 0.135 266.6)
-
Step 500
500
#5981F2
oklch(63.1% 0.175 266.7)
-
Step 600
600 (this color)
#436AE3
oklch(56.4% 0.189 266.7)
-
Step 700
700
#3355C3
oklch(49.1% 0.176 266.7)
-
Step 800
800
#2B469D
oklch(42.6% 0.145 267)
-
Step 900
900
#263C7D
oklch(37.7% 0.114 266.8)
-
Step 950
950
#162449
oklch(27% 0.071 266.2)
#436AE3 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) | #0A7AE7 | 0.045 |
| Deuteranopia (no green cones) | #006CE1 | 0.036 |
| Tritanopia (no blue cones) | #00879C | 0.152 |
| Achromatopsia (no color) | #737373 | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436AE3
#436AE3
oklch(56.4% 0.189 266.7)
- #937000
#937000
oklch(56.4% 0.115 86.8)
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 #436AE3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.005
- Neon Blue #4361EE ΔE 0.028
- Cerulean Blue #056EEE ΔE 0.036
- Warm Blue #4B57DB ΔE 0.045
- Azul #1D5DEC ΔE 0.049
- Dark Periwinkle #665FD1 ΔE 0.053
- Clear Blue #247AFD ΔE 0.053
- Bright Blue #0165FC ΔE 0.054
Use #436AE3 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.