#216CF3
Closest named color: Cerulean Blue (#056EEE). oklch(56.9% 0.216 261.2), rgb(33, 108, 243).
Aa
White text reads best on this color (4.66:1).
About this color
#216CF3 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.216 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.012 away. White text reads best on it, at 4.66:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.216) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.50:1 |
| White text | 4.66:1 |
Values
| HEX | #216CF3 |
| RGB | rgb(33, 108, 243) |
| HSL | hsl(219, 90%, 54%) |
| OKLCH | oklch(56.9% 0.216 261.2) |
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 #216CF3 | 4.66:1 | AA | Lc -77.1 | Fine for body text |
| Black text on #216CF3 | 4.50:1 | AA | Lc 32.4 | Non-text elements, placeholder text |
| #216CF3 text on white | 4.66:1 | AA | Lc 71.6 | Content text, not long reading |
| #216CF3 text on black | 4.50:1 | AA | Lc -30.0 | Non-text elements, placeholder text |
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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFD
oklch(93.7% 0.027 260.3)
-
Step 200
200
#C6DAFE
oklch(88.5% 0.054 262.2)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400
#699FFF
oklch(70.8% 0.152 261.1)
-
Step 500
500
#3E82FF
oklch(63% 0.199 261.3)
-
Step 600
600 (this color)
#216CF3
oklch(56.9% 0.216 261.2)
-
Step 700
700
#0F55CF
oklch(49.1% 0.2 261.2)
-
Step 800
800
#1047A8
oklch(42.8% 0.166 261.1)
-
Step 900
900
#153D85
oklch(37.8% 0.129 261.1)
-
Step 950
950
#0D244E
oklch(27% 0.083 261.2)
#216CF3 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) | #007EF8 | 0.043 |
| Deuteranopia (no green cones) | #006BF0 | 0.012 |
| Tritanopia (no blue cones) | #008EA5 | 0.165 |
| Achromatopsia (no color) | #747474 | 0.216 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #216CF3
#216CF3
oklch(56.9% 0.216 261.2)
- #9A6E00
#9A6E00
oklch(56.8% 0.117 80.8)
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 #216CF3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.012
- Bright Blue #0165FC ΔE 0.025
- Neon Blue #4361EE ΔE 0.032
- Royal Blue #4169E1 ΔE 0.034
- Clear Blue #247AFD ΔE 0.037
- Azul #1D5DEC ΔE 0.037
- Electric Blue #0652FF ΔE 0.062
- Warm Blue #4B57DB ΔE 0.063
Use #216CF3 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.