#216AD1
Closest named color: Royal Blue (#4169E1). oklch(53.9% 0.174 258.2), rgb(33, 106, 209).
Aa
White text reads best on this color (5.18:1).
About this color
#216AD1 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.174 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.036 away. White text reads best on it, at 5.18:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.04:1 |
| White text | 5.18:1 |
Values
| HEX | #216AD1 |
| RGB | rgb(33, 106, 209) |
| HSL | hsl(215, 73%, 47%) |
| OKLCH | oklch(53.9% 0.174 258.2) |
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 #216AD1 | 5.18:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #216AD1 | 4.04:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #216AD1 text on white | 5.18:1 | AA | Lc 75.1 | Fine for body text |
| #216AD1 text on black | 4.04:1 | AA large text | Lc -26.6 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C8DBF7
oklch(88.6% 0.044 258)
-
Step 300
300
#A2C3F4
oklch(81% 0.078 258.1)
-
Step 400
400
#6EA2EE
oklch(70.8% 0.125 257.8)
-
Step 500
500
#4788E9
oklch(63.2% 0.161 258.3)
-
Step 600
600 (this color)
#216AD1
oklch(53.9% 0.174 258.2)
-
Step 700
700
#195CBA
oklch(49% 0.162 258.3)
-
Step 800
800
#184C97
oklch(42.7% 0.135 258.4)
-
Step 900
900
#1A4078
oklch(37.7% 0.105 258.3)
-
Step 950
950
#102646
oklch(27% 0.066 257.9)
#216AD1 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) | #2A75D5 | 0.031 |
| Deuteranopia (no green cones) | #0065CF | 0.019 |
| Tritanopia (no blue cones) | #008393 | 0.133 |
| Achromatopsia (no color) | #6D6D6D | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #216AD1
#216AD1
oklch(53.9% 0.174 258.2)
- #916500
#916500
oklch(53.9% 0.112 78.8)
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 #216AD1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.036
- Cerulean Blue #056EEE ΔE 0.045
- Mid Blue #276AB3 ΔE 0.047
- Azul #1D5DEC ΔE 0.053
- Windows Blue #3778BF ΔE 0.054
- Neon Blue #4361EE ΔE 0.056
- Warm Blue #4B57DB ΔE 0.057
- French Blue #436BAD ΔE 0.061
Use #216AD1 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.